/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 20:21:34,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 20:21:34,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 20:21:34,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 20:21:34,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 20:21:34,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 20:21:34,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 20:21:34,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 20:21:34,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 20:21:34,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 20:21:34,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 20:21:34,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 20:21:34,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 20:21:34,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 20:21:34,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 20:21:34,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 20:21:34,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 20:21:34,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 20:21:34,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 20:21:34,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 20:21:34,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 20:21:34,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 20:21:34,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 20:21:34,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 20:21:34,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-15 20:21:34,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 20:21:34,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 20:21:34,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 20:21:34,773 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 20:21:34,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 20:21:34,775 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 20:21:34,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 20:21:34,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 20:21:34,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 20:21:34,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 20:21:34,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 20:21:34,779 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-SemanticLbe.epf [2020-10-15 20:21:34,820 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 20:21:34,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 20:21:34,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 20:21:34,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 20:21:34,823 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 20:21:34,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 20:21:34,823 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 20:21:34,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 20:21:34,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 20:21:34,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 20:21:34,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 20:21:34,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 20:21:34,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 20:21:34,826 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 20:21:34,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 20:21:34,827 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 20:21:34,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 20:21:34,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 20:21:34,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 20:21:34,828 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 20:21:34,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 20:21:34,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 20:21:34,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 20:21:34,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 20:21:34,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 20:21:34,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 20:21:34,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 20:21:34,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 20:21:34,829 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 20:21:35,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 20:21:35,125 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 20:21:35,128 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 20:21:35,130 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 20:21:35,130 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 20:21:35,131 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-15 20:21:35,198 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be80c580e/655fa5eb08b94386903ac906c734c6d7/FLAGd16637b5d [2020-10-15 20:21:35,749 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 20:21:35,750 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-15 20:21:35,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be80c580e/655fa5eb08b94386903ac906c734c6d7/FLAGd16637b5d [2020-10-15 20:21:36,161 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be80c580e/655fa5eb08b94386903ac906c734c6d7 [2020-10-15 20:21:36,171 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 20:21:36,173 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 20:21:36,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 20:21:36,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 20:21:36,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 20:21:36,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:21:36" (1/1) ... [2020-10-15 20:21:36,182 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3f833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36, skipping insertion in model container [2020-10-15 20:21:36,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:21:36" (1/1) ... [2020-10-15 20:21:36,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 20:21:36,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 20:21:36,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 20:21:36,763 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 20:21:36,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 20:21:36,883 INFO L208 MainTranslator]: Completed translation [2020-10-15 20:21:36,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36 WrapperNode [2020-10-15 20:21:36,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 20:21:36,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 20:21:36,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 20:21:36,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 20:21:36,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (1/1) ... [2020-10-15 20:21:36,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (1/1) ... [2020-10-15 20:21:36,936 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 20:21:36,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 20:21:36,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 20:21:36,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 20:21:36,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (1/1) ... [2020-10-15 20:21:36,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (1/1) ... [2020-10-15 20:21:36,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (1/1) ... [2020-10-15 20:21:36,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (1/1) ... [2020-10-15 20:21:36,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (1/1) ... [2020-10-15 20:21:36,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (1/1) ... [2020-10-15 20:21:36,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (1/1) ... [2020-10-15 20:21:36,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 20:21:36,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 20:21:36,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 20:21:36,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 20:21:36,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (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 [2020-10-15 20:21:37,044 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-15 20:21:37,045 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-15 20:21:37,045 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-15 20:21:37,045 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-15 20:21:37,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 20:21:37,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-15 20:21:37,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 20:21:37,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 20:21:37,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-15 20:21:37,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 20:21:37,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 20:21:37,054 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 20:21:37,423 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 20:21:37,424 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 20:21:37,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:21:37 BoogieIcfgContainer [2020-10-15 20:21:37,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 20:21:37,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 20:21:37,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 20:21:37,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 20:21:37,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:21:36" (1/3) ... [2020-10-15 20:21:37,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a72fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:21:37, skipping insertion in model container [2020-10-15 20:21:37,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (2/3) ... [2020-10-15 20:21:37,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a72fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:21:37, skipping insertion in model container [2020-10-15 20:21:37,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:21:37" (3/3) ... [2020-10-15 20:21:37,435 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-10-15 20:21:37,446 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 20:21:37,447 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 20:21:37,452 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 20:21:37,453 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 20:21:37,476 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,477 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,477 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,477 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,478 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,478 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,479 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,479 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,479 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,479 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,479 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,480 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,480 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,480 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,481 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,481 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,481 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,481 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,481 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,482 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,482 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,482 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,482 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,483 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,483 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,483 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,483 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,483 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,487 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,487 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,488 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,488 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,488 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,488 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,496 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,496 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,497 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,497 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,497 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,497 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:37,515 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 20:21:37,537 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 20:21:37,538 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 20:21:37,538 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 20:21:37,538 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 20:21:37,538 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 20:21:37,538 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 20:21:37,539 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 20:21:37,539 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 20:21:37,552 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 20:21:37,555 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-15 20:21:37,558 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-15 20:21:37,561 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-15 20:21:37,600 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-15 20:21:37,601 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 20:21:37,607 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-15 20:21:37,609 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-15 20:21:38,882 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-15 20:21:38,883 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-15 20:21:38,890 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-15 20:21:38,902 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-15 20:21:38,904 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-15 20:21:38,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-15 20:21:38,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:38,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-15 20:21:38,913 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:38,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:38,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-15 20:21:38,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:38,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495631043] [2020-10-15 20:21:38,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:39,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495631043] [2020-10-15 20:21:39,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:21:39,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 20:21:39,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969911886] [2020-10-15 20:21:39,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 20:21:39,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:39,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 20:21:39,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 20:21:39,225 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-15 20:21:39,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:39,303 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-15 20:21:39,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 20:21:39,305 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-15 20:21:39,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:39,319 INFO L225 Difference]: With dead ends: 75 [2020-10-15 20:21:39,319 INFO L226 Difference]: Without dead ends: 42 [2020-10-15 20:21:39,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 20:21:39,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-15 20:21:39,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-15 20:21:39,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 20:21:39,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-15 20:21:39,365 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-15 20:21:39,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:39,365 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-15 20:21:39,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 20:21:39,365 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-15 20:21:39,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 20:21:39,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:39,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:39,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 20:21:39,367 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:39,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:39,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-15 20:21:39,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:39,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679136391] [2020-10-15 20:21:39,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:39,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679136391] [2020-10-15 20:21:39,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:21:39,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 20:21:39,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908095336] [2020-10-15 20:21:39,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 20:21:39,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:39,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 20:21:39,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 20:21:39,483 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-15 20:21:39,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:39,515 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-15 20:21:39,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 20:21:39,515 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 20:21:39,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:39,517 INFO L225 Difference]: With dead ends: 56 [2020-10-15 20:21:39,517 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 20:21:39,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-15 20:21:39,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 20:21:39,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-15 20:21:39,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 20:21:39,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-15 20:21:39,526 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-15 20:21:39,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:39,527 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-15 20:21:39,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 20:21:39,527 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-15 20:21:39,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 20:21:39,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:39,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:39,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 20:21:39,529 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:39,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:39,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-15 20:21:39,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:39,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040288493] [2020-10-15 20:21:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:39,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040288493] [2020-10-15 20:21:39,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:21:39,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 20:21:39,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84099852] [2020-10-15 20:21:39,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 20:21:39,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:39,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 20:21:39,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 20:21:39,607 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-15 20:21:39,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:39,684 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-15 20:21:39,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 20:21:39,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 20:21:39,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:39,686 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:21:39,686 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 20:21:39,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:39,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 20:21:39,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-15 20:21:39,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:39,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 20:21:39,696 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-15 20:21:39,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:39,696 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 20:21:39,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 20:21:39,696 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 20:21:39,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 20:21:39,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:39,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:39,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 20:21:39,698 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:39,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:39,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-15 20:21:39,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:39,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073048287] [2020-10-15 20:21:39,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:39,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073048287] [2020-10-15 20:21:39,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:21:39,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 20:21:39,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060309700] [2020-10-15 20:21:39,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 20:21:39,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:39,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 20:21:39,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 20:21:39,780 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-15 20:21:39,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:39,863 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-15 20:21:39,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 20:21:39,864 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 20:21:39,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:39,865 INFO L225 Difference]: With dead ends: 54 [2020-10-15 20:21:39,865 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 20:21:39,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:39,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 20:21:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-15 20:21:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 20:21:39,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-15 20:21:39,872 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-15 20:21:39,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:39,872 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-15 20:21:39,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 20:21:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-15 20:21:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 20:21:39,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:39,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:39,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 20:21:39,886 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:39,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:39,887 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-15 20:21:39,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:39,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461041653] [2020-10-15 20:21:39,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:39,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461041653] [2020-10-15 20:21:39,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:21:39,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 20:21:39,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780380678] [2020-10-15 20:21:39,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 20:21:39,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:39,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 20:21:39,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 20:21:39,942 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-15 20:21:40,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:40,013 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-15 20:21:40,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 20:21:40,013 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 20:21:40,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:40,014 INFO L225 Difference]: With dead ends: 57 [2020-10-15 20:21:40,015 INFO L226 Difference]: Without dead ends: 51 [2020-10-15 20:21:40,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:40,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-15 20:21:40,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-15 20:21:40,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 20:21:40,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-15 20:21:40,021 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-15 20:21:40,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:40,021 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-15 20:21:40,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 20:21:40,022 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-15 20:21:40,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:40,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:40,023 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:40,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 20:21:40,023 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:40,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:40,023 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-15 20:21:40,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:40,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076934520] [2020-10-15 20:21:40,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:40,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076934520] [2020-10-15 20:21:40,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375049282] [2020-10-15 20:21:40,101 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 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 [2020-10-15 20:21:40,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:40,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:40,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:40,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:40,222 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:40,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:40,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 20:21:40,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311536319] [2020-10-15 20:21:40,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:40,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:40,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:40,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:40,237 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-15 20:21:40,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:40,349 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-15 20:21:40,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 20:21:40,349 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 20:21:40,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:40,350 INFO L225 Difference]: With dead ends: 48 [2020-10-15 20:21:40,351 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 20:21:40,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 20:21:40,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-15 20:21:40,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 20:21:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-15 20:21:40,356 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-15 20:21:40,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:40,356 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-15 20:21:40,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:40,357 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-15 20:21:40,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:40,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:40,357 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:40,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-15 20:21:40,571 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:40,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:40,572 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-15 20:21:40,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:40,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020877884] [2020-10-15 20:21:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:40,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020877884] [2020-10-15 20:21:40,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11777883] [2020-10-15 20:21:40,661 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 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 [2020-10-15 20:21:40,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:40,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:40,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:40,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:40,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:40,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-15 20:21:40,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483175542] [2020-10-15 20:21:40,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 20:21:40,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:40,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 20:21:40,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-15 20:21:40,732 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-15 20:21:40,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:40,804 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-15 20:21:40,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 20:21:40,804 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-15 20:21:40,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:40,805 INFO L225 Difference]: With dead ends: 54 [2020-10-15 20:21:40,805 INFO L226 Difference]: Without dead ends: 48 [2020-10-15 20:21:40,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:40,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-15 20:21:40,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-15 20:21:40,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 20:21:40,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-15 20:21:40,811 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-15 20:21:40,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:40,812 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-15 20:21:40,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 20:21:40,812 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-15 20:21:40,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:40,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:40,813 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:41,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:41,025 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:41,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:41,026 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-15 20:21:41,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:41,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130924833] [2020-10-15 20:21:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:41,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130924833] [2020-10-15 20:21:41,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63021924] [2020-10-15 20:21:41,088 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 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 [2020-10-15 20:21:41,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 20:21:41,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:41,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:41,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:41,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:41,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:41,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 20:21:41,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509528498] [2020-10-15 20:21:41,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:41,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:41,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:41,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:41,189 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-15 20:21:41,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:41,294 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-15 20:21:41,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 20:21:41,295 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 20:21:41,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:41,296 INFO L225 Difference]: With dead ends: 58 [2020-10-15 20:21:41,296 INFO L226 Difference]: Without dead ends: 52 [2020-10-15 20:21:41,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:41,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-15 20:21:41,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-15 20:21:41,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 20:21:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-15 20:21:41,301 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-15 20:21:41,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:41,302 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-15 20:21:41,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:41,302 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-15 20:21:41,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:41,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:41,303 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:41,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:41,516 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:41,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:41,516 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-15 20:21:41,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:41,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401142379] [2020-10-15 20:21:41,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:41,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401142379] [2020-10-15 20:21:41,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949997767] [2020-10-15 20:21:41,568 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 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 [2020-10-15 20:21:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:41,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:41,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:41,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:41,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-15 20:21:41,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40346945] [2020-10-15 20:21:41,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 20:21:41,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:41,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 20:21:41,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-15 20:21:41,631 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-15 20:21:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:41,785 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-15 20:21:41,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:41,785 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-15 20:21:41,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:41,786 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:21:41,787 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 20:21:41,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:41,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 20:21:41,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-15 20:21:41,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-15 20:21:41,793 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-15 20:21:41,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:41,793 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-15 20:21:41,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 20:21:41,793 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-15 20:21:41,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:41,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:41,794 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:42,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:42,006 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:42,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:42,006 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-15 20:21:42,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:42,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570195438] [2020-10-15 20:21:42,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:42,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570195438] [2020-10-15 20:21:42,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832411740] [2020-10-15 20:21:42,055 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 [2020-10-15 20:21:42,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:42,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:42,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:42,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:42,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:42,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:42,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 20:21:42,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376003924] [2020-10-15 20:21:42,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:42,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:42,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:42,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:42,151 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-15 20:21:42,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:42,336 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-15 20:21:42,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 20:21:42,336 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 20:21:42,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:42,337 INFO L225 Difference]: With dead ends: 62 [2020-10-15 20:21:42,337 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 20:21:42,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:42,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 20:21:42,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-15 20:21:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-15 20:21:42,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-15 20:21:42,342 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-15 20:21:42,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:42,342 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-15 20:21:42,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:42,343 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-15 20:21:42,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:42,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:42,344 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:42,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-15 20:21:42,555 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:42,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:42,555 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-15 20:21:42,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:42,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236370800] [2020-10-15 20:21:42,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:42,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236370800] [2020-10-15 20:21:42,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415049188] [2020-10-15 20:21:42,617 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 [2020-10-15 20:21:42,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 20:21:42,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:42,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:42,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:42,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:42,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-15 20:21:42,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333315923] [2020-10-15 20:21:42,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:42,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:42,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:42,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:42,690 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-15 20:21:42,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:42,794 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-15 20:21:42,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 20:21:42,794 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-15 20:21:42,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:42,795 INFO L225 Difference]: With dead ends: 64 [2020-10-15 20:21:42,795 INFO L226 Difference]: Without dead ends: 58 [2020-10-15 20:21:42,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:42,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-15 20:21:42,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-15 20:21:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 20:21:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-15 20:21:42,800 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-15 20:21:42,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:42,800 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-15 20:21:42,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:42,801 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-15 20:21:42,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:42,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:42,802 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:43,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:43,013 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:43,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:43,013 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-15 20:21:43,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:43,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887336941] [2020-10-15 20:21:43,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:43,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887336941] [2020-10-15 20:21:43,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762897830] [2020-10-15 20:21:43,073 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 [2020-10-15 20:21:43,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:43,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:43,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:43,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:43,152 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:43,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:43,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 20:21:43,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354252033] [2020-10-15 20:21:43,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:43,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:43,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:43,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:43,166 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-15 20:21:43,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:43,329 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-15 20:21:43,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 20:21:43,333 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 20:21:43,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:43,334 INFO L225 Difference]: With dead ends: 61 [2020-10-15 20:21:43,334 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 20:21:43,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:43,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 20:21:43,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-15 20:21:43,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 20:21:43,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-15 20:21:43,338 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-15 20:21:43,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:43,339 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-15 20:21:43,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:43,339 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-15 20:21:43,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:43,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:43,340 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:43,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:43,548 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:43,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:43,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-15 20:21:43,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:43,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388424773] [2020-10-15 20:21:43,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:43,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388424773] [2020-10-15 20:21:43,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051558723] [2020-10-15 20:21:43,609 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 [2020-10-15 20:21:43,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:43,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:43,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:43,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:43,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:43,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:43,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-15 20:21:43,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16890720] [2020-10-15 20:21:43,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:43,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:43,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:43,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:43,696 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-15 20:21:43,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:43,861 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-15 20:21:43,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:43,862 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-15 20:21:43,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:43,863 INFO L225 Difference]: With dead ends: 77 [2020-10-15 20:21:43,863 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 20:21:43,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:43,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 20:21:43,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-15 20:21:43,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 20:21:43,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-15 20:21:43,869 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-15 20:21:43,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:43,869 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-15 20:21:43,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:43,870 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-15 20:21:43,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:43,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:43,871 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:44,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 20:21:44,084 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:44,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:44,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-15 20:21:44,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:44,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454996054] [2020-10-15 20:21:44,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:44,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454996054] [2020-10-15 20:21:44,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381936973] [2020-10-15 20:21:44,158 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 [2020-10-15 20:21:44,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 20:21:44,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:44,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:44,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:44,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:44,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:44,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 20:21:44,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48321137] [2020-10-15 20:21:44,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:44,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:44,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:44,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:44,236 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-15 20:21:44,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:44,446 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-15 20:21:44,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:21:44,448 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 20:21:44,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:44,449 INFO L225 Difference]: With dead ends: 58 [2020-10-15 20:21:44,449 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 20:21:44,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:21:44,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 20:21:44,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-15 20:21:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-15 20:21:44,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-15 20:21:44,453 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-15 20:21:44,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:44,453 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-15 20:21:44,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:44,453 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-15 20:21:44,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:44,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:44,454 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:44,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:44,664 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:44,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:44,665 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-15 20:21:44,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:44,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873039548] [2020-10-15 20:21:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:44,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873039548] [2020-10-15 20:21:44,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066723825] [2020-10-15 20:21:44,721 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 [2020-10-15 20:21:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:44,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:44,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:44,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:44,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:44,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 20:21:44,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690996041] [2020-10-15 20:21:44,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:44,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:44,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:44,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:44,810 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-15 20:21:44,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:44,990 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-15 20:21:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:44,990 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 20:21:44,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:44,991 INFO L225 Difference]: With dead ends: 60 [2020-10-15 20:21:44,991 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 20:21:44,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:21:44,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 20:21:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-15 20:21:44,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:44,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 20:21:44,995 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-15 20:21:44,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:44,995 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 20:21:44,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:44,996 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 20:21:44,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:44,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:44,996 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:45,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 20:21:45,207 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:45,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:45,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-15 20:21:45,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:45,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078146065] [2020-10-15 20:21:45,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:45,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078146065] [2020-10-15 20:21:45,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282892170] [2020-10-15 20:21:45,267 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 [2020-10-15 20:21:45,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:45,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:45,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:45,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:45,329 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:45,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:45,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 20:21:45,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621360263] [2020-10-15 20:21:45,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:45,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:45,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:45,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:45,341 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-15 20:21:45,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:45,538 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-15 20:21:45,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:45,543 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 20:21:45,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:45,543 INFO L225 Difference]: With dead ends: 54 [2020-10-15 20:21:45,543 INFO L226 Difference]: Without dead ends: 49 [2020-10-15 20:21:45,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:21:45,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-15 20:21:45,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-15 20:21:45,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-15 20:21:45,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-15 20:21:45,547 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-15 20:21:45,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:45,547 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-15 20:21:45,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:45,548 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-15 20:21:45,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:45,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:45,548 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:45,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 20:21:45,757 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:45,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:45,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-15 20:21:45,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:45,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957475287] [2020-10-15 20:21:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:45,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957475287] [2020-10-15 20:21:45,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711717557] [2020-10-15 20:21:45,831 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 [2020-10-15 20:21:45,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:21:45,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:45,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:45,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:45,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:45,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 20:21:45,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499176149] [2020-10-15 20:21:45,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:45,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:45,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:45,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:45,918 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-15 20:21:46,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:46,034 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-15 20:21:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 20:21:46,035 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 20:21:46,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:46,036 INFO L225 Difference]: With dead ends: 60 [2020-10-15 20:21:46,036 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 20:21:46,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:46,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 20:21:46,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-15 20:21:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-15 20:21:46,040 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-15 20:21:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:46,040 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-15 20:21:46,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:46,040 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-15 20:21:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:46,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:46,041 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:46,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 20:21:46,251 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:46,251 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-15 20:21:46,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:46,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328831132] [2020-10-15 20:21:46,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:46,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328831132] [2020-10-15 20:21:46,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658888223] [2020-10-15 20:21:46,335 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 [2020-10-15 20:21:46,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:46,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:46,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:46,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:46,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:46,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:46,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 20:21:46,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978100166] [2020-10-15 20:21:46,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:46,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:46,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:46,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:46,427 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-15 20:21:46,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:46,574 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-15 20:21:46,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 20:21:46,574 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 20:21:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:46,575 INFO L225 Difference]: With dead ends: 66 [2020-10-15 20:21:46,575 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 20:21:46,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:46,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 20:21:46,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-15 20:21:46,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 20:21:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-15 20:21:46,580 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-15 20:21:46,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:46,580 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-15 20:21:46,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:46,581 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-15 20:21:46,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:46,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:46,582 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:46,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 20:21:46,783 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:46,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:46,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-15 20:21:46,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:46,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343306837] [2020-10-15 20:21:46,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:46,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343306837] [2020-10-15 20:21:46,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347134234] [2020-10-15 20:21:46,845 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 [2020-10-15 20:21:46,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:21:46,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:46,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:46,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:46,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:46,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 20:21:46,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055082664] [2020-10-15 20:21:46,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:46,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:46,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:46,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:46,910 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-15 20:21:47,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:47,074 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-15 20:21:47,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:21:47,075 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 20:21:47,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:47,075 INFO L225 Difference]: With dead ends: 67 [2020-10-15 20:21:47,075 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 20:21:47,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:21:47,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 20:21:47,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-15 20:21:47,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-15 20:21:47,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-15 20:21:47,078 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-15 20:21:47,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:47,079 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-15 20:21:47,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:47,079 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-15 20:21:47,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:47,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:47,080 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:47,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:47,288 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:47,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:47,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-15 20:21:47,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:47,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209776977] [2020-10-15 20:21:47,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:47,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209776977] [2020-10-15 20:21:47,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744808772] [2020-10-15 20:21:47,349 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 [2020-10-15 20:21:47,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:21:47,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:47,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:47,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:47,427 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:47,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:47,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 20:21:47,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577976578] [2020-10-15 20:21:47,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:47,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:47,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:47,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:47,440 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-15 20:21:47,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:47,644 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-15 20:21:47,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:21:47,645 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 20:21:47,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:47,646 INFO L225 Difference]: With dead ends: 69 [2020-10-15 20:21:47,646 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 20:21:47,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:21:47,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 20:21:47,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-15 20:21:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:47,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 20:21:47,652 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-15 20:21:47,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:47,652 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 20:21:47,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:47,652 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 20:21:47,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:47,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:47,653 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:47,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:47,854 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:47,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:47,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-15 20:21:47,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:47,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828289986] [2020-10-15 20:21:47,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:47,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828289986] [2020-10-15 20:21:47,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142067042] [2020-10-15 20:21:47,907 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 [2020-10-15 20:21:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:47,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:47,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:47,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:47,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 20:21:47,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798712023] [2020-10-15 20:21:47,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:47,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:47,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:47,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:47,962 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-15 20:21:48,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:48,179 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-15 20:21:48,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:48,183 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 20:21:48,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:48,184 INFO L225 Difference]: With dead ends: 88 [2020-10-15 20:21:48,184 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 20:21:48,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:21:48,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 20:21:48,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-15 20:21:48,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 20:21:48,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-15 20:21:48,188 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-15 20:21:48,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:48,188 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-15 20:21:48,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:48,189 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-15 20:21:48,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:48,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:48,189 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:48,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:48,390 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:48,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:48,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-15 20:21:48,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:48,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206688767] [2020-10-15 20:21:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:48,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206688767] [2020-10-15 20:21:48,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502939748] [2020-10-15 20:21:48,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:21:48,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:48,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:48,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:48,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:48,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:48,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 20:21:48,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378424908] [2020-10-15 20:21:48,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:48,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:48,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:48,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:48,566 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-15 20:21:48,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:48,834 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-15 20:21:48,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:48,835 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 20:21:48,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:48,835 INFO L225 Difference]: With dead ends: 69 [2020-10-15 20:21:48,835 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 20:21:48,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:21:48,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 20:21:48,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-15 20:21:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 20:21:48,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-15 20:21:48,838 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-15 20:21:48,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:48,839 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-15 20:21:48,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-15 20:21:48,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:48,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:48,839 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:49,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-15 20:21:49,049 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:49,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:49,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-15 20:21:49,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:49,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252117521] [2020-10-15 20:21:49,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:49,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252117521] [2020-10-15 20:21:49,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675513977] [2020-10-15 20:21:49,128 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 [2020-10-15 20:21:49,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:21:49,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:49,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:49,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:49,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:49,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 20:21:49,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969909868] [2020-10-15 20:21:49,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:49,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:49,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:49,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:49,218 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-15 20:21:49,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:49,349 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-15 20:21:49,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:49,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 20:21:49,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:49,350 INFO L225 Difference]: With dead ends: 74 [2020-10-15 20:21:49,350 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 20:21:49,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:21:49,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 20:21:49,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-15 20:21:49,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 20:21:49,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 20:21:49,353 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-15 20:21:49,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:49,353 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 20:21:49,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:49,354 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 20:21:49,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:49,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:49,354 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:49,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-15 20:21:49,562 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:49,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:49,562 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-15 20:21:49,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:49,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508976798] [2020-10-15 20:21:49,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:49,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508976798] [2020-10-15 20:21:49,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951872071] [2020-10-15 20:21:49,640 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 [2020-10-15 20:21:49,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:49,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:49,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:49,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:49,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:49,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:49,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 20:21:49,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243871769] [2020-10-15 20:21:49,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:49,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:49,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:49,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:49,722 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-15 20:21:49,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:49,915 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-15 20:21:49,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:21:49,917 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 20:21:49,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:49,918 INFO L225 Difference]: With dead ends: 71 [2020-10-15 20:21:49,919 INFO L226 Difference]: Without dead ends: 65 [2020-10-15 20:21:49,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:21:49,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-15 20:21:49,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-15 20:21:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:49,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 20:21:49,922 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-15 20:21:49,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:49,922 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 20:21:49,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:49,922 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 20:21:49,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:49,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:49,923 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:50,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-15 20:21:50,126 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:50,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-15 20:21:50,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:50,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964102777] [2020-10-15 20:21:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:50,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964102777] [2020-10-15 20:21:50,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877957098] [2020-10-15 20:21:50,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:21:50,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:21:50,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:50,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:50,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:50,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:50,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 20:21:50,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656548020] [2020-10-15 20:21:50,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:50,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:50,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:50,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:50,283 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-15 20:21:50,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:50,473 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-15 20:21:50,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:21:50,473 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 20:21:50,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:50,474 INFO L225 Difference]: With dead ends: 68 [2020-10-15 20:21:50,474 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 20:21:50,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:21:50,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 20:21:50,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-15 20:21:50,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 20:21:50,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 20:21:50,478 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-15 20:21:50,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:50,479 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 20:21:50,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:50,479 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 20:21:50,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:50,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:50,479 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:50,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-15 20:21:50,687 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:50,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:50,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-15 20:21:50,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:50,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796229416] [2020-10-15 20:21:50,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:50,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:50,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796229416] [2020-10-15 20:21:50,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184629509] [2020-10-15 20:21:50,753 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 [2020-10-15 20:21:50,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:21:50,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:50,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:50,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:50,839 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:50,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:50,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 20:21:50,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962694399] [2020-10-15 20:21:50,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:50,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:50,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:50,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:50,859 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-15 20:21:51,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:51,141 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-15 20:21:51,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:51,142 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 20:21:51,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:51,143 INFO L225 Difference]: With dead ends: 67 [2020-10-15 20:21:51,143 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 20:21:51,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:21:51,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 20:21:51,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-15 20:21:51,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:51,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 20:21:51,146 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-15 20:21:51,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:51,147 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 20:21:51,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:51,147 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 20:21:51,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:51,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:51,147 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:51,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 20:21:51,352 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:51,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:51,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-15 20:21:51,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:51,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936584713] [2020-10-15 20:21:51,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:51,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936584713] [2020-10-15 20:21:51,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972197595] [2020-10-15 20:21:51,423 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 [2020-10-15 20:21:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:51,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:51,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:51,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:51,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 20:21:51,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107847439] [2020-10-15 20:21:51,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:51,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:51,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:51,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:51,488 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-15 20:21:51,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:51,701 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-15 20:21:51,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:51,702 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 20:21:51,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:51,703 INFO L225 Difference]: With dead ends: 83 [2020-10-15 20:21:51,704 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 20:21:51,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:21:51,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 20:21:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-15 20:21:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 20:21:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-15 20:21:51,708 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-15 20:21:51,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:51,708 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-15 20:21:51,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:51,709 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-15 20:21:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:51,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:51,709 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:51,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:51,915 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:51,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:51,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-15 20:21:51,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:51,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090267902] [2020-10-15 20:21:51,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:51,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090267902] [2020-10-15 20:21:51,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749624875] [2020-10-15 20:21:51,978 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 [2020-10-15 20:21:52,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:52,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:52,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:52,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:52,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:52,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:52,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 20:21:52,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066276779] [2020-10-15 20:21:52,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:52,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:52,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:52,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:52,072 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-15 20:21:52,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:52,380 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-15 20:21:52,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:21:52,380 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 20:21:52,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:52,381 INFO L225 Difference]: With dead ends: 64 [2020-10-15 20:21:52,381 INFO L226 Difference]: Without dead ends: 56 [2020-10-15 20:21:52,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:21:52,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-15 20:21:52,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-10-15 20:21:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-15 20:21:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-15 20:21:52,384 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-15 20:21:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:52,384 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-15 20:21:52,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:52,385 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-15 20:21:52,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:52,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:52,385 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:52,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 20:21:52,595 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:52,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:52,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-15 20:21:52,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:52,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351639447] [2020-10-15 20:21:52,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:52,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:52,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351639447] [2020-10-15 20:21:52,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596826102] [2020-10-15 20:21:52,658 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 [2020-10-15 20:21:52,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:21:52,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:52,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:52,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:52,723 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:52,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:52,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 20:21:52,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940121941] [2020-10-15 20:21:52,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:52,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:52,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:52,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:52,734 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-15 20:21:53,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:53,011 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-15 20:21:53,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:53,012 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 20:21:53,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:53,012 INFO L225 Difference]: With dead ends: 68 [2020-10-15 20:21:53,012 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 20:21:53,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:21:53,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 20:21:53,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-15 20:21:53,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 20:21:53,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-15 20:21:53,016 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-15 20:21:53,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:53,016 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-15 20:21:53,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:53,016 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-15 20:21:53,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:53,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:53,017 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:53,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-15 20:21:53,227 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:53,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:53,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-15 20:21:53,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:53,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328378701] [2020-10-15 20:21:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:53,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328378701] [2020-10-15 20:21:53,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732710596] [2020-10-15 20:21:53,316 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 [2020-10-15 20:21:53,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:53,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:53,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:53,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:53,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:53,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:53,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:53,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117331490] [2020-10-15 20:21:53,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:53,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:53,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:53,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:53,418 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-15 20:21:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:53,727 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-15 20:21:53,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:53,733 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:53,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:53,733 INFO L225 Difference]: With dead ends: 60 [2020-10-15 20:21:53,733 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 20:21:53,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:21:53,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 20:21:53,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-15 20:21:53,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 20:21:53,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-15 20:21:53,737 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-15 20:21:53,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:53,737 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-15 20:21:53,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:53,738 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-15 20:21:53,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:53,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:53,739 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:53,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:53,945 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:53,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:53,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-15 20:21:53,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:53,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463003175] [2020-10-15 20:21:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:54,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463003175] [2020-10-15 20:21:54,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401610803] [2020-10-15 20:21:54,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:21:54,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:21:54,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:54,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:54,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:54,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:54,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 20:21:54,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339362299] [2020-10-15 20:21:54,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:54,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:54,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:54,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:54,106 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-15 20:21:54,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:54,275 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-15 20:21:54,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:54,276 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 20:21:54,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:54,277 INFO L225 Difference]: With dead ends: 66 [2020-10-15 20:21:54,277 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 20:21:54,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:21:54,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 20:21:54,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-15 20:21:54,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:54,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-15 20:21:54,281 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-15 20:21:54,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:54,281 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-15 20:21:54,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:54,281 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-15 20:21:54,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:54,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:54,282 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:54,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:54,491 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:54,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:54,492 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-15 20:21:54,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:54,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040995786] [2020-10-15 20:21:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:54,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040995786] [2020-10-15 20:21:54,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457021113] [2020-10-15 20:21:54,577 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 [2020-10-15 20:21:54,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:21:54,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:54,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:54,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:54,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:54,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:54,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:54,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580245453] [2020-10-15 20:21:54,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:54,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:54,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:54,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:54,653 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-15 20:21:54,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:54,840 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-15 20:21:54,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:21:54,841 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:54,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:54,841 INFO L225 Difference]: With dead ends: 74 [2020-10-15 20:21:54,842 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 20:21:54,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:21:54,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 20:21:54,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-15 20:21:54,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 20:21:54,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-15 20:21:54,847 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-15 20:21:54,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:54,847 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-15 20:21:54,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:54,847 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-15 20:21:54,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:54,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:54,851 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:55,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-15 20:21:55,060 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:55,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-15 20:21:55,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:55,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792950123] [2020-10-15 20:21:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:55,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792950123] [2020-10-15 20:21:55,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138961651] [2020-10-15 20:21:55,136 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 [2020-10-15 20:21:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:55,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:55,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:55,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:55,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 20:21:55,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800812365] [2020-10-15 20:21:55,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:55,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:55,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:55,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:55,193 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-15 20:21:55,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:55,401 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-15 20:21:55,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:55,402 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 20:21:55,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:55,402 INFO L225 Difference]: With dead ends: 75 [2020-10-15 20:21:55,402 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 20:21:55,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:21:55,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 20:21:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-15 20:21:55,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 20:21:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 20:21:55,406 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-15 20:21:55,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:55,407 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 20:21:55,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:55,407 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 20:21:55,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:55,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:55,408 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:55,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:55,616 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:55,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:55,616 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-15 20:21:55,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:55,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347408614] [2020-10-15 20:21:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:55,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347408614] [2020-10-15 20:21:55,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024287863] [2020-10-15 20:21:55,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:21:55,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:55,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:55,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:55,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:55,767 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:55,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:55,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:55,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712650276] [2020-10-15 20:21:55,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:55,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:55,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:55,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:55,781 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-15 20:21:56,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:56,063 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-15 20:21:56,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:56,064 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:56,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:56,064 INFO L225 Difference]: With dead ends: 79 [2020-10-15 20:21:56,065 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 20:21:56,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:21:56,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 20:21:56,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-15 20:21:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 20:21:56,068 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-15 20:21:56,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:56,069 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 20:21:56,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:56,069 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 20:21:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:56,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:56,069 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:56,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-15 20:21:56,276 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:56,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:56,277 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-15 20:21:56,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:56,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255491498] [2020-10-15 20:21:56,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:56,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255491498] [2020-10-15 20:21:56,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187871838] [2020-10-15 20:21:56,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:21:56,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:21:56,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:56,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:56,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:56,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:56,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 20:21:56,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337482354] [2020-10-15 20:21:56,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:56,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:56,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:56,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:56,503 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-15 20:21:56,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:56,792 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-15 20:21:56,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:21:56,793 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 20:21:56,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:56,794 INFO L225 Difference]: With dead ends: 79 [2020-10-15 20:21:56,794 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 20:21:56,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:21:56,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 20:21:56,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-15 20:21:56,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 20:21:56,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-15 20:21:56,799 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-15 20:21:56,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:56,800 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-15 20:21:56,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:56,800 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-15 20:21:56,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:56,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:56,801 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:57,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:57,011 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:57,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:57,012 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-15 20:21:57,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:57,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092830994] [2020-10-15 20:21:57,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:57,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092830994] [2020-10-15 20:21:57,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627717845] [2020-10-15 20:21:57,121 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 [2020-10-15 20:21:57,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:57,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:57,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:57,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:57,216 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:57,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:57,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:57,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028250059] [2020-10-15 20:21:57,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:57,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:57,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:57,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:57,231 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-15 20:21:57,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:57,619 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-15 20:21:57,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:21:57,620 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:57,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:57,621 INFO L225 Difference]: With dead ends: 76 [2020-10-15 20:21:57,621 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 20:21:57,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:21:57,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 20:21:57,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-15 20:21:57,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 20:21:57,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-15 20:21:57,625 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-15 20:21:57,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:57,626 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-15 20:21:57,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:57,626 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-15 20:21:57,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:57,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:57,627 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:57,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-15 20:21:57,839 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:57,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:57,840 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-15 20:21:57,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:57,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317757095] [2020-10-15 20:21:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:57,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317757095] [2020-10-15 20:21:57,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552449465] [2020-10-15 20:21:57,907 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 [2020-10-15 20:21:57,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:21:57,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:57,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:57,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:57,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:57,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 20:21:57,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234972735] [2020-10-15 20:21:57,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:57,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:57,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:57,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:57,995 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-15 20:21:58,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:58,253 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-15 20:21:58,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:58,257 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 20:21:58,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:58,257 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:21:58,258 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 20:21:58,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:21:58,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 20:21:58,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-15 20:21:58,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:21:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-15 20:21:58,261 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-15 20:21:58,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:58,261 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-15 20:21:58,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-15 20:21:58,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:58,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:58,262 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:58,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-15 20:21:58,472 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:58,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:58,472 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-15 20:21:58,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:58,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380623613] [2020-10-15 20:21:58,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:58,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:58,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380623613] [2020-10-15 20:21:58,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248787802] [2020-10-15 20:21:58,537 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 [2020-10-15 20:21:58,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:21:58,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:58,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:58,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:58,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:58,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:58,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040166576] [2020-10-15 20:21:58,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:58,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:58,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:58,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:58,630 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-15 20:21:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:58,993 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-15 20:21:58,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:21:58,993 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:58,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:58,994 INFO L225 Difference]: With dead ends: 77 [2020-10-15 20:21:58,994 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 20:21:58,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:21:58,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 20:21:58,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-15 20:21:58,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 20:21:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-15 20:21:58,997 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-15 20:21:58,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:58,997 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-15 20:21:58,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:58,998 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-15 20:21:58,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:58,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:58,998 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:59,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-15 20:21:59,206 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:59,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:59,206 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-15 20:21:59,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:59,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990429981] [2020-10-15 20:21:59,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:59,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990429981] [2020-10-15 20:21:59,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303898093] [2020-10-15 20:21:59,299 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 [2020-10-15 20:21:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:59,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:59,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:59,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:59,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 20:21:59,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041240156] [2020-10-15 20:21:59,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:59,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:59,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:59,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:59,385 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-15 20:21:59,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:59,596 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-15 20:21:59,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:21:59,596 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 20:21:59,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:59,597 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:21:59,597 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 20:21:59,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:21:59,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 20:21:59,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-15 20:21:59,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:21:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 20:21:59,600 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 20:21:59,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:59,601 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 20:21:59,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:59,601 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 20:21:59,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:59,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:59,601 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:59,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 20:21:59,810 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:59,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:59,811 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-15 20:21:59,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:59,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308294671] [2020-10-15 20:21:59,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:59,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308294671] [2020-10-15 20:21:59,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387201234] [2020-10-15 20:21:59,907 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 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 [2020-10-15 20:21:59,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:59,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:59,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:59,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:59,964 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:59,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:59,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:21:59,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997574428] [2020-10-15 20:21:59,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:59,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:59,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:59,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:59,977 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 20:22:00,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:00,228 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-15 20:22:00,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:22:00,228 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:22:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:00,229 INFO L225 Difference]: With dead ends: 81 [2020-10-15 20:22:00,229 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 20:22:00,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:22:00,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 20:22:00,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-15 20:22:00,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:22:00,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 20:22:00,233 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 20:22:00,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:00,233 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 20:22:00,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:22:00,233 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 20:22:00,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:22:00,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:00,234 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:00,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 20:22:00,443 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:00,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:00,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-15 20:22:00,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:00,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574916197] [2020-10-15 20:22:00,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:00,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574916197] [2020-10-15 20:22:00,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140597195] [2020-10-15 20:22:00,527 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 [2020-10-15 20:22:00,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:22:00,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:00,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:22:00,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:00,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:00,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:00,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 20:22:00,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694876548] [2020-10-15 20:22:00,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:22:00,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:00,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:22:00,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:22:00,609 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 20:22:00,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:00,843 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-15 20:22:00,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:22:00,845 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 20:22:00,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:00,846 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:22:00,846 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 20:22:00,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:22:00,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 20:22:00,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-15 20:22:00,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:22:00,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 20:22:00,850 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 20:22:00,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:00,850 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 20:22:00,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:22:00,851 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 20:22:00,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:22:00,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:00,851 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:01,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-15 20:22:01,062 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:01,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:01,062 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-15 20:22:01,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:01,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997502794] [2020-10-15 20:22:01,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:01,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997502794] [2020-10-15 20:22:01,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971615130] [2020-10-15 20:22:01,148 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 [2020-10-15 20:22:01,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:01,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:01,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:22:01,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:01,214 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:01,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:01,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:22:01,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665524373] [2020-10-15 20:22:01,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:22:01,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:01,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:22:01,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:22:01,226 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 20:22:01,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:01,570 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-15 20:22:01,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:22:01,576 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:22:01,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:01,577 INFO L225 Difference]: With dead ends: 77 [2020-10-15 20:22:01,577 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 20:22:01,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:22:01,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 20:22:01,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-15 20:22:01,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:22:01,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 20:22:01,580 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 20:22:01,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:01,580 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 20:22:01,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:22:01,581 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 20:22:01,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:22:01,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:01,584 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:01,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-15 20:22:01,785 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:01,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:01,785 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-15 20:22:01,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:01,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805038567] [2020-10-15 20:22:01,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:01,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805038567] [2020-10-15 20:22:01,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839170144] [2020-10-15 20:22:01,869 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 [2020-10-15 20:22:01,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:22:01,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:01,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:22:01,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:01,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:01,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 20:22:01,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203859319] [2020-10-15 20:22:01,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:22:01,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:01,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:22:01,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:22:01,963 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 20:22:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:02,280 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-15 20:22:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:22:02,281 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 20:22:02,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:02,281 INFO L225 Difference]: With dead ends: 74 [2020-10-15 20:22:02,282 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 20:22:02,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:22:02,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 20:22:02,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-15 20:22:02,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:22:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 20:22:02,286 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 20:22:02,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:02,288 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 20:22:02,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:22:02,289 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 20:22:02,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:22:02,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:02,289 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:02,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:02,498 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:02,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:02,499 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-15 20:22:02,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:02,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204787884] [2020-10-15 20:22:02,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:02,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204787884] [2020-10-15 20:22:02,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954716900] [2020-10-15 20:22:02,579 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 [2020-10-15 20:22:02,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:22:02,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:02,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:22:02,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:02,644 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:02,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:02,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:22:02,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597332905] [2020-10-15 20:22:02,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:22:02,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:02,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:22:02,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:22:02,656 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 20:22:03,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:03,034 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-15 20:22:03,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:22:03,038 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:22:03,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:03,039 INFO L225 Difference]: With dead ends: 73 [2020-10-15 20:22:03,039 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 20:22:03,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:22:03,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 20:22:03,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-15 20:22:03,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:22:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 20:22:03,043 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 20:22:03,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:03,043 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 20:22:03,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:22:03,043 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 20:22:03,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:22:03,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:03,044 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:03,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-15 20:22:03,244 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:03,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:03,245 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-15 20:22:03,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:03,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033350549] [2020-10-15 20:22:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:03,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033350549] [2020-10-15 20:22:03,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504841398] [2020-10-15 20:22:03,316 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 [2020-10-15 20:22:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:03,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:22:03,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:03,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:03,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 20:22:03,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385956116] [2020-10-15 20:22:03,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:22:03,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:03,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:22:03,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:22:03,376 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 20:22:03,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:03,679 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-15 20:22:03,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:22:03,680 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 20:22:03,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:03,681 INFO L225 Difference]: With dead ends: 89 [2020-10-15 20:22:03,681 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 20:22:03,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:22:03,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 20:22:03,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-15 20:22:03,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 20:22:03,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-15 20:22:03,686 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-15 20:22:03,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:03,687 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-15 20:22:03,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:22:03,687 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-15 20:22:03,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:22:03,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:03,687 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:03,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:03,898 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:03,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:03,899 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-15 20:22:03,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:03,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319429916] [2020-10-15 20:22:03,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:03,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319429916] [2020-10-15 20:22:03,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315368500] [2020-10-15 20:22:03,977 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 [2020-10-15 20:22:04,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:04,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:04,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:04,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:04,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:04,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:22:04,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585997515] [2020-10-15 20:22:04,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:22:04,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:04,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:22:04,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:22:04,070 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-15 20:22:04,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:04,436 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-10-15 20:22:04,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:22:04,437 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:22:04,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:04,437 INFO L225 Difference]: With dead ends: 68 [2020-10-15 20:22:04,438 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 20:22:04,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:22:04,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 20:22:04,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-10-15 20:22:04,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 20:22:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-15 20:22:04,443 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-15 20:22:04,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:04,443 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-15 20:22:04,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:22:04,443 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-15 20:22:04,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:22:04,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:04,443 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:04,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-15 20:22:04,649 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:04,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:04,650 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-15 20:22:04,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:04,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401037917] [2020-10-15 20:22:04,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:04,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401037917] [2020-10-15 20:22:04,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293007810] [2020-10-15 20:22:04,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:22:04,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:22:04,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:04,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:22:04,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:04,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:22:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:04,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:04,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:22:04,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784541768] [2020-10-15 20:22:04,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:22:04,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:04,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:22:04,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:22:04,796 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-15 20:22:05,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:05,187 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-15 20:22:05,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:22:05,188 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:22:05,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:05,188 INFO L225 Difference]: With dead ends: 76 [2020-10-15 20:22:05,188 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 20:22:05,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:22:05,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 20:22:05,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-15 20:22:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:22:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-15 20:22:05,192 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-15 20:22:05,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:05,192 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-15 20:22:05,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:22:05,192 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-15 20:22:05,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:05,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:05,193 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:05,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:05,400 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:05,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:05,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-15 20:22:05,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:05,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047810030] [2020-10-15 20:22:05,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:05,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047810030] [2020-10-15 20:22:05,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127031713] [2020-10-15 20:22:05,481 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 [2020-10-15 20:22:05,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:05,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:05,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:05,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:05,562 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:22:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:05,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:05,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:22:05,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320596636] [2020-10-15 20:22:05,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:05,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:05,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:05,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:05,578 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-15 20:22:05,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:05,987 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-15 20:22:05,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:22:05,988 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:22:05,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:05,989 INFO L225 Difference]: With dead ends: 66 [2020-10-15 20:22:05,989 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 20:22:05,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:22:05,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 20:22:05,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-15 20:22:05,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:22:05,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-15 20:22:05,991 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-15 20:22:05,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:05,992 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-15 20:22:05,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:05,992 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-15 20:22:05,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:05,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:05,992 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:06,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-15 20:22:06,201 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:06,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:06,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-15 20:22:06,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:06,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607900438] [2020-10-15 20:22:06,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:06,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607900438] [2020-10-15 20:22:06,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362185549] [2020-10-15 20:22:06,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:22:06,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 20:22:06,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:06,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:06,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:06,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:06,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:22:06,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545405984] [2020-10-15 20:22:06,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:22:06,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:06,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:22:06,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:22:06,386 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-15 20:22:06,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:06,565 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-15 20:22:06,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:22:06,566 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:22:06,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:06,566 INFO L225 Difference]: With dead ends: 72 [2020-10-15 20:22:06,567 INFO L226 Difference]: Without dead ends: 66 [2020-10-15 20:22:06,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:22:06,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-15 20:22:06,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-15 20:22:06,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 20:22:06,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-15 20:22:06,570 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-15 20:22:06,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:06,570 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-15 20:22:06,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:22:06,570 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-15 20:22:06,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:06,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:06,571 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:06,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-15 20:22:06,774 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:06,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:06,774 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-15 20:22:06,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:06,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608671750] [2020-10-15 20:22:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:06,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608671750] [2020-10-15 20:22:06,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146554271] [2020-10-15 20:22:06,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:06,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 20:22:06,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:06,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:06,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:06,950 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:06,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:06,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:22:06,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040985828] [2020-10-15 20:22:06,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:06,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:06,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:06,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:06,962 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-15 20:22:07,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:07,192 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-15 20:22:07,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:22:07,193 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:22:07,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:07,194 INFO L225 Difference]: With dead ends: 82 [2020-10-15 20:22:07,194 INFO L226 Difference]: Without dead ends: 76 [2020-10-15 20:22:07,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:22:07,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-15 20:22:07,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-15 20:22:07,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 20:22:07,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-15 20:22:07,198 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-15 20:22:07,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:07,198 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-15 20:22:07,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:07,198 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-15 20:22:07,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:07,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:07,199 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:07,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-15 20:22:07,408 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:07,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:07,408 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-15 20:22:07,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:07,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314882135] [2020-10-15 20:22:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:07,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314882135] [2020-10-15 20:22:07,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448291296] [2020-10-15 20:22:07,515 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 [2020-10-15 20:22:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:07,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:07,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:07,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:07,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:22:07,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248136008] [2020-10-15 20:22:07,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:22:07,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:07,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:22:07,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:22:07,571 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-15 20:22:07,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:07,832 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-15 20:22:07,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:22:07,833 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:22:07,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:07,834 INFO L225 Difference]: With dead ends: 83 [2020-10-15 20:22:07,835 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 20:22:07,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:22:07,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 20:22:07,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-15 20:22:07,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 20:22:07,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-15 20:22:07,837 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-15 20:22:07,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:07,838 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-15 20:22:07,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:22:07,838 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-15 20:22:07,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:07,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:07,838 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:08,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-15 20:22:08,048 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:08,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:08,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-15 20:22:08,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:08,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980758865] [2020-10-15 20:22:08,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:08,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980758865] [2020-10-15 20:22:08,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461953063] [2020-10-15 20:22:08,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:22:08,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:08,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:08,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:08,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:08,244 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:08,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:08,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:22:08,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076906757] [2020-10-15 20:22:08,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:08,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:08,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:08,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:08,256 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-15 20:22:08,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:08,643 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-15 20:22:08,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:22:08,646 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:22:08,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:08,647 INFO L225 Difference]: With dead ends: 89 [2020-10-15 20:22:08,647 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 20:22:08,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:22:08,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 20:22:08,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-15 20:22:08,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 20:22:08,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-15 20:22:08,653 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-15 20:22:08,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:08,653 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-15 20:22:08,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:08,654 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-15 20:22:08,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:08,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:08,655 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:08,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:08,865 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:08,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:08,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-15 20:22:08,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:08,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687602878] [2020-10-15 20:22:08,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:08,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687602878] [2020-10-15 20:22:08,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12769584] [2020-10-15 20:22:08,976 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 [2020-10-15 20:22:09,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 20:22:09,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:09,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:09,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:09,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:09,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:22:09,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468129977] [2020-10-15 20:22:09,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:22:09,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:09,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:22:09,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:22:09,038 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-15 20:22:09,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:09,336 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-15 20:22:09,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:22:09,336 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:22:09,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:09,337 INFO L225 Difference]: With dead ends: 89 [2020-10-15 20:22:09,337 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 20:22:09,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:22:09,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 20:22:09,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-15 20:22:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:22:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 20:22:09,340 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-15 20:22:09,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:09,341 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 20:22:09,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:22:09,341 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 20:22:09,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:09,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:09,342 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:09,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:09,543 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:09,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:09,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-15 20:22:09,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:09,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205693861] [2020-10-15 20:22:09,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:09,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205693861] [2020-10-15 20:22:09,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232283988] [2020-10-15 20:22:09,652 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 [2020-10-15 20:22:09,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:09,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:09,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:09,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:09,732 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:09,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:09,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:22:09,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284912851] [2020-10-15 20:22:09,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:09,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:09,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:09,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:09,744 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-15 20:22:10,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:10,108 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-15 20:22:10,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:22:10,108 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:22:10,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:10,109 INFO L225 Difference]: With dead ends: 86 [2020-10-15 20:22:10,109 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 20:22:10,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:22:10,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 20:22:10,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-15 20:22:10,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:22:10,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 20:22:10,112 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-15 20:22:10,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:10,113 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 20:22:10,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:10,113 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 20:22:10,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:10,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:10,113 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:10,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-15 20:22:10,318 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:10,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:10,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-15 20:22:10,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:10,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251259304] [2020-10-15 20:22:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:10,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251259304] [2020-10-15 20:22:10,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659243100] [2020-10-15 20:22:10,416 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 [2020-10-15 20:22:10,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 20:22:10,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:10,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:10,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:10,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:10,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:22:10,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530070952] [2020-10-15 20:22:10,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:22:10,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:10,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:22:10,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:22:10,508 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-15 20:22:10,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:10,864 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-15 20:22:10,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:22:10,864 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:22:10,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:10,865 INFO L225 Difference]: With dead ends: 87 [2020-10-15 20:22:10,865 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 20:22:10,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:22:10,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 20:22:10,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-15 20:22:10,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 20:22:10,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-15 20:22:10,868 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-15 20:22:10,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:10,868 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-15 20:22:10,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:22:10,869 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-15 20:22:10,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:10,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:10,869 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:11,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:11,078 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:11,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:11,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-15 20:22:11,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:11,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123569498] [2020-10-15 20:22:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:11,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123569498] [2020-10-15 20:22:11,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89648933] [2020-10-15 20:22:11,164 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 [2020-10-15 20:22:11,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 20:22:11,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:11,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:11,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:11,229 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:11,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:11,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:11,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:22:11,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479277711] [2020-10-15 20:22:11,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:11,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:11,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:11,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:11,243 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-15 20:22:11,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:11,682 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-15 20:22:11,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:22:11,682 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:22:11,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:11,684 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:22:11,684 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 20:22:11,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:22:11,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 20:22:11,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-15 20:22:11,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:22:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-15 20:22:11,688 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-15 20:22:11,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:11,688 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-15 20:22:11,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:11,688 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-15 20:22:11,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:11,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:11,689 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:11,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-15 20:22:11,899 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:11,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:11,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-15 20:22:11,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:11,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770681002] [2020-10-15 20:22:11,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:11,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770681002] [2020-10-15 20:22:11,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402306367] [2020-10-15 20:22:11,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:22:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:12,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:12,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:12,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:12,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:22:12,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457796993] [2020-10-15 20:22:12,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:22:12,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:12,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:22:12,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:22:12,051 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-15 20:22:12,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:12,443 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-15 20:22:12,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:12,444 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:22:12,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:12,445 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:22:12,445 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:22:12,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:22:12,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:22:12,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-15 20:22:12,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:22:12,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-15 20:22:12,449 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-15 20:22:12,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:12,449 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-15 20:22:12,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:22:12,449 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-15 20:22:12,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:22:12,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:12,450 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:12,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-15 20:22:12,660 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:12,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:12,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-15 20:22:12,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:12,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444069890] [2020-10-15 20:22:12,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:12,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444069890] [2020-10-15 20:22:12,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948525923] [2020-10-15 20:22:12,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:22:12,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:12,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:12,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:22:12,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:12,816 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:12,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:12,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:22:12,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495869084] [2020-10-15 20:22:12,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:12,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:12,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:12,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:12,827 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-15 20:22:13,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:13,296 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-15 20:22:13,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:22:13,296 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:22:13,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:13,297 INFO L225 Difference]: With dead ends: 85 [2020-10-15 20:22:13,297 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 20:22:13,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:22:13,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 20:22:13,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-15 20:22:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 20:22:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-15 20:22:13,301 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-15 20:22:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:13,302 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-15 20:22:13,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-15 20:22:13,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:13,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:13,303 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:13,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-15 20:22:13,512 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:13,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-15 20:22:13,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:13,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011659209] [2020-10-15 20:22:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:13,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011659209] [2020-10-15 20:22:13,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600591279] [2020-10-15 20:22:13,649 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 [2020-10-15 20:22:13,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 20:22:13,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:13,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:13,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:13,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:13,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:22:13,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635311380] [2020-10-15 20:22:13,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:13,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:13,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:13,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:13,710 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-15 20:22:13,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:13,911 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-15 20:22:13,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:22:13,911 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:22:13,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:13,912 INFO L225 Difference]: With dead ends: 94 [2020-10-15 20:22:13,912 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 20:22:13,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:22:13,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 20:22:13,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-15 20:22:13,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:22:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:22:13,918 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 20:22:13,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:13,918 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:22:13,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:13,919 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:22:13,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:13,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:13,919 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:14,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-15 20:22:14,121 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:14,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:14,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-15 20:22:14,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:14,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323328806] [2020-10-15 20:22:14,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:14,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323328806] [2020-10-15 20:22:14,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700612895] [2020-10-15 20:22:14,246 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 [2020-10-15 20:22:14,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:14,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:14,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:14,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:14,306 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:14,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:14,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:22:14,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952363463] [2020-10-15 20:22:14,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:14,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:14,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:14,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:14,317 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 20:22:14,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:14,610 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-15 20:22:14,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:22:14,610 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:22:14,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:14,611 INFO L225 Difference]: With dead ends: 91 [2020-10-15 20:22:14,611 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:22:14,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:22:14,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:22:14,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-15 20:22:14,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:22:14,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:22:14,615 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 20:22:14,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:14,615 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:22:14,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:14,615 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:22:14,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:14,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:14,616 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:14,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-15 20:22:14,823 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:14,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:14,823 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-15 20:22:14,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:14,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859987692] [2020-10-15 20:22:14,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:14,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:14,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859987692] [2020-10-15 20:22:14,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47762365] [2020-10-15 20:22:14,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:22:14,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 20:22:14,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:14,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:14,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:14,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:14,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:22:14,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719002163] [2020-10-15 20:22:14,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:14,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:14,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:14,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:14,999 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 20:22:15,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:15,282 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-15 20:22:15,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:22:15,282 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:22:15,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:15,283 INFO L225 Difference]: With dead ends: 88 [2020-10-15 20:22:15,283 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 20:22:15,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:22:15,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 20:22:15,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-15 20:22:15,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:22:15,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:22:15,286 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 20:22:15,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:15,286 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:22:15,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:15,286 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:22:15,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:15,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:15,287 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:15,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:15,488 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:15,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:15,488 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-15 20:22:15,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:15,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804989257] [2020-10-15 20:22:15,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:15,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804989257] [2020-10-15 20:22:15,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531329137] [2020-10-15 20:22:15,603 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 [2020-10-15 20:22:15,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 20:22:15,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:15,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:15,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:15,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:15,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:15,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:22:15,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496736572] [2020-10-15 20:22:15,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:15,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:15,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:15,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:15,677 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 20:22:16,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:16,119 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-15 20:22:16,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:22:16,120 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:22:16,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:16,121 INFO L225 Difference]: With dead ends: 87 [2020-10-15 20:22:16,121 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 20:22:16,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:22:16,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 20:22:16,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-15 20:22:16,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:22:16,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:22:16,128 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 20:22:16,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:16,128 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:22:16,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:16,129 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:22:16,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:16,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:16,129 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:16,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:16,330 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:16,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:16,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-15 20:22:16,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:16,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280816162] [2020-10-15 20:22:16,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:16,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280816162] [2020-10-15 20:22:16,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224593814] [2020-10-15 20:22:16,424 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 [2020-10-15 20:22:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:16,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:16,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:16,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:16,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:22:16,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428710483] [2020-10-15 20:22:16,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:16,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:16,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:16,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:16,492 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 20:22:16,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:16,805 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-15 20:22:16,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:22:16,806 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:22:16,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:16,807 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:22:16,807 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 20:22:16,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:22:16,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 20:22:16,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-15 20:22:16,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:22:16,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:22:16,810 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 20:22:16,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:16,810 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:22:16,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:22:16,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:16,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:16,810 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:17,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-15 20:22:17,011 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:17,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:17,012 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-15 20:22:17,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:17,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146412904] [2020-10-15 20:22:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:17,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146412904] [2020-10-15 20:22:17,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912737170] [2020-10-15 20:22:17,108 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 [2020-10-15 20:22:17,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:17,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:17,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:17,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:17,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:17,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:17,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:22:17,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632529110] [2020-10-15 20:22:17,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:17,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:17,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:17,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:17,194 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 20:22:17,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:17,641 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-15 20:22:17,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:22:17,641 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:22:17,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:17,642 INFO L225 Difference]: With dead ends: 83 [2020-10-15 20:22:17,642 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 20:22:17,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:22:17,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 20:22:17,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-15 20:22:17,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:22:17,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:22:17,646 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 20:22:17,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:17,646 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:22:17,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:17,646 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:22:17,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:17,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:17,647 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:17,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:17,855 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:17,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:17,855 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-15 20:22:17,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:17,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220284289] [2020-10-15 20:22:17,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:17,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220284289] [2020-10-15 20:22:17,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436686170] [2020-10-15 20:22:17,954 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 [2020-10-15 20:22:18,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 20:22:18,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:18,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:18,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:18,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:18,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:22:18,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853915720] [2020-10-15 20:22:18,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:18,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:18,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:18,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:18,028 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 20:22:18,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:18,398 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-15 20:22:18,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:22:18,399 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:22:18,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:18,400 INFO L225 Difference]: With dead ends: 80 [2020-10-15 20:22:18,400 INFO L226 Difference]: Without dead ends: 74 [2020-10-15 20:22:18,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:22:18,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-15 20:22:18,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-15 20:22:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:22:18,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:22:18,403 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 20:22:18,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:18,404 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:22:18,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:18,404 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:22:18,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:18,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:18,404 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:18,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-15 20:22:18,613 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:18,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:18,613 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-15 20:22:18,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:18,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848116738] [2020-10-15 20:22:18,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:18,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848116738] [2020-10-15 20:22:18,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356514684] [2020-10-15 20:22:18,709 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 [2020-10-15 20:22:18,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:18,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:18,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:18,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:18,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:18,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:18,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:22:18,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902261362] [2020-10-15 20:22:18,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:18,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:18,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:18,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:18,787 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 20:22:19,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:19,304 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-15 20:22:19,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:22:19,305 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:22:19,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:19,306 INFO L225 Difference]: With dead ends: 79 [2020-10-15 20:22:19,306 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 20:22:19,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:22:19,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 20:22:19,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-15 20:22:19,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:22:19,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:22:19,309 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 20:22:19,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:19,309 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:22:19,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:19,310 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:22:19,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:19,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:19,310 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:19,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:19,512 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:19,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:19,513 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-15 20:22:19,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:19,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595345309] [2020-10-15 20:22:19,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:19,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595345309] [2020-10-15 20:22:19,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687959944] [2020-10-15 20:22:19,597 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 [2020-10-15 20:22:19,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 20:22:19,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:19,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:19,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:19,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:19,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:22:19,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63240957] [2020-10-15 20:22:19,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:22:19,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:19,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:22:19,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:22:19,677 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 20:22:20,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:20,102 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-15 20:22:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:20,103 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:22:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:20,104 INFO L225 Difference]: With dead ends: 95 [2020-10-15 20:22:20,104 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 20:22:20,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:22:20,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 20:22:20,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-15 20:22:20,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:22:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-15 20:22:20,108 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-15 20:22:20,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:20,108 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-15 20:22:20,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:22:20,109 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-15 20:22:20,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:20,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:20,109 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:20,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-15 20:22:20,315 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:20,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:20,315 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-15 20:22:20,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:20,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131743972] [2020-10-15 20:22:20,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:20,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131743972] [2020-10-15 20:22:20,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188953122] [2020-10-15 20:22:20,413 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 [2020-10-15 20:22:20,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 20:22:20,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:20,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:20,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:20,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:20,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:20,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:22:20,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005535503] [2020-10-15 20:22:20,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:20,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:20,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:20,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:20,492 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-15 20:22:21,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:21,053 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-10-15 20:22:21,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:22:21,054 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:22:21,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:21,055 INFO L225 Difference]: With dead ends: 76 [2020-10-15 20:22:21,055 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 20:22:21,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:22:21,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 20:22:21,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-15 20:22:21,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 20:22:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-15 20:22:21,057 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-15 20:22:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:21,057 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-15 20:22:21,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:21,058 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-15 20:22:21,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:22:21,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:21,058 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:21,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:21,259 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:21,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:21,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-15 20:22:21,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:21,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010503145] [2020-10-15 20:22:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:21,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:21,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010503145] [2020-10-15 20:22:21,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272007563] [2020-10-15 20:22:21,349 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 [2020-10-15 20:22:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:21,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:22:21,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:21,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:22:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:21,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:21,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:22:21,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567925922] [2020-10-15 20:22:21,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:21,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:21,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:21,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:21,449 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-15 20:22:21,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:21,963 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-15 20:22:21,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:21,963 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:22:21,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:21,964 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:22:21,964 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 20:22:21,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:22:21,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 20:22:21,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-15 20:22:21,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:22:21,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-15 20:22:21,968 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-15 20:22:21,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:21,968 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-15 20:22:21,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:21,968 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-15 20:22:21,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:21,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:21,968 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:22,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-15 20:22:22,170 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:22,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:22,170 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-15 20:22:22,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:22,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965401831] [2020-10-15 20:22:22,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:22,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965401831] [2020-10-15 20:22:22,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001813472] [2020-10-15 20:22:22,276 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 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 [2020-10-15 20:22:22,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:22,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:22,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:22,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:22,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:22:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:22,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:22,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:22:22,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966207450] [2020-10-15 20:22:22,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:22,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:22,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:22,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:22,352 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-15 20:22:22,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:22,907 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-15 20:22:22,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:22,908 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:22:22,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:22,909 INFO L225 Difference]: With dead ends: 72 [2020-10-15 20:22:22,909 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 20:22:22,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:22:22,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 20:22:22,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-15 20:22:22,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:22:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-15 20:22:22,911 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-15 20:22:22,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:22,912 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-15 20:22:22,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:22,912 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-15 20:22:22,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:22,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:22,912 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:23,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-15 20:22:23,113 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:23,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:23,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-15 20:22:23,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:23,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635155342] [2020-10-15 20:22:23,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:23,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635155342] [2020-10-15 20:22:23,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616041799] [2020-10-15 20:22:23,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:22:23,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:22:23,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:23,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:23,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:23,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:23,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:22:23,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505346404] [2020-10-15 20:22:23,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:23,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:23,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:23,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:23,339 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-15 20:22:23,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:23,572 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-15 20:22:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:22:23,572 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:22:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:23,573 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:22:23,573 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 20:22:23,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:22:23,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 20:22:23,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-15 20:22:23,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:22:23,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-15 20:22:23,580 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-15 20:22:23,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:23,580 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-15 20:22:23,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:23,580 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-15 20:22:23,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:23,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:23,581 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:23,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:23,790 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:23,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:23,790 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-15 20:22:23,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:23,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443345678] [2020-10-15 20:22:23,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:23,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443345678] [2020-10-15 20:22:23,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24744647] [2020-10-15 20:22:23,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:22:23,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:23,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:23,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:23,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:24,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:24,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:24,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:22:24,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976897987] [2020-10-15 20:22:24,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:24,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:24,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:24,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:24,018 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-15 20:22:24,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:24,303 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-15 20:22:24,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:22:24,303 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:22:24,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:24,305 INFO L225 Difference]: With dead ends: 90 [2020-10-15 20:22:24,305 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 20:22:24,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:22:24,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 20:22:24,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-15 20:22:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:22:24,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-15 20:22:24,307 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-15 20:22:24,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:24,307 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-15 20:22:24,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:24,308 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-15 20:22:24,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:24,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:24,308 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:24,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:24,517 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:24,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:24,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-15 20:22:24,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:24,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095468444] [2020-10-15 20:22:24,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:24,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095468444] [2020-10-15 20:22:24,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356189542] [2020-10-15 20:22:24,643 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 [2020-10-15 20:22:24,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 20:22:24,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:24,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:24,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:24,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:24,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:22:24,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412268007] [2020-10-15 20:22:24,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:24,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:24,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:24,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:24,704 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-15 20:22:25,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:25,024 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-15 20:22:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:22:25,025 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:22:25,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:25,026 INFO L225 Difference]: With dead ends: 91 [2020-10-15 20:22:25,026 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:22:25,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:22:25,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:22:25,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-15 20:22:25,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 20:22:25,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-15 20:22:25,028 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-15 20:22:25,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:25,028 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-15 20:22:25,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:25,028 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-15 20:22:25,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:25,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:25,028 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:25,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:25,229 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:25,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:25,230 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-15 20:22:25,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:25,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596958950] [2020-10-15 20:22:25,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:25,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596958950] [2020-10-15 20:22:25,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749801277] [2020-10-15 20:22:25,367 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 [2020-10-15 20:22:25,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 20:22:25,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:25,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:25,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:25,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:25,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:25,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:22:25,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279689561] [2020-10-15 20:22:25,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:25,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:25,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:25,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:25,495 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-15 20:22:25,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:25,970 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-15 20:22:25,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:22:25,971 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:22:25,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:25,972 INFO L225 Difference]: With dead ends: 99 [2020-10-15 20:22:25,973 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 20:22:25,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:22:25,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 20:22:25,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-15 20:22:25,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:22:25,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-15 20:22:25,977 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-15 20:22:25,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:25,977 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-15 20:22:25,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:25,977 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-15 20:22:25,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:25,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:25,978 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:26,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:26,188 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:26,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:26,190 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-15 20:22:26,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:26,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216692269] [2020-10-15 20:22:26,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:26,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:26,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216692269] [2020-10-15 20:22:26,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653528142] [2020-10-15 20:22:26,373 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 [2020-10-15 20:22:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:26,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:26,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:26,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:26,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:22:26,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164839991] [2020-10-15 20:22:26,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:26,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:26,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:26,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:26,470 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-15 20:22:26,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:26,989 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-15 20:22:26,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:22:26,990 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:22:26,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:26,991 INFO L225 Difference]: With dead ends: 99 [2020-10-15 20:22:26,991 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 20:22:26,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:22:26,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 20:22:26,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-15 20:22:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 20:22:26,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-15 20:22:26,995 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-15 20:22:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:26,996 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-15 20:22:26,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:26,996 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-15 20:22:26,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:26,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:26,997 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:27,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-15 20:22:27,206 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:27,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:27,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-15 20:22:27,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:27,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116317864] [2020-10-15 20:22:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:27,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116317864] [2020-10-15 20:22:27,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973284134] [2020-10-15 20:22:27,332 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 [2020-10-15 20:22:27,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:27,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:27,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:27,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:27,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:27,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:27,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:22:27,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083814563] [2020-10-15 20:22:27,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:27,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:27,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:27,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:27,416 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-15 20:22:27,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:27,841 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-15 20:22:27,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:22:27,842 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:22:27,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:27,842 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:22:27,843 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 20:22:27,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:22:27,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 20:22:27,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-15 20:22:27,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 20:22:27,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-15 20:22:27,845 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-15 20:22:27,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:27,845 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-15 20:22:27,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:27,845 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-15 20:22:27,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:27,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:27,845 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:28,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:28,046 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:28,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:28,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-15 20:22:28,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:28,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76446437] [2020-10-15 20:22:28,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:28,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76446437] [2020-10-15 20:22:28,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885455250] [2020-10-15 20:22:28,151 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 [2020-10-15 20:22:28,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:22:28,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:28,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:28,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:28,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:28,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:22:28,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422405585] [2020-10-15 20:22:28,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:28,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:28,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:28,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:28,230 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-15 20:22:28,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:28,614 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-15 20:22:28,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:28,615 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:22:28,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:28,616 INFO L225 Difference]: With dead ends: 97 [2020-10-15 20:22:28,616 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 20:22:28,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:22:28,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 20:22:28,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-15 20:22:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:22:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:22:28,620 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-15 20:22:28,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:28,620 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:22:28,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:28,620 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:22:28,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:28,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:28,621 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:28,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-15 20:22:28,830 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:28,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:28,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-15 20:22:28,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:28,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190535247] [2020-10-15 20:22:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:28,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190535247] [2020-10-15 20:22:28,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853175330] [2020-10-15 20:22:28,939 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 [2020-10-15 20:22:29,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:29,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:29,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:29,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:29,040 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:29,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:29,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:22:29,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586445271] [2020-10-15 20:22:29,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:29,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:29,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:29,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:29,057 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-15 20:22:29,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:29,563 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-15 20:22:29,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:22:29,564 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:22:29,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:29,565 INFO L225 Difference]: With dead ends: 94 [2020-10-15 20:22:29,565 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 20:22:29,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 20:22:29,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 20:22:29,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-15 20:22:29,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:22:29,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:22:29,569 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-15 20:22:29,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:29,569 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:22:29,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:29,569 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:22:29,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:29,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:29,569 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:29,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:29,770 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:29,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:29,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-15 20:22:29,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:29,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52851941] [2020-10-15 20:22:29,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:29,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52851941] [2020-10-15 20:22:29,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880891485] [2020-10-15 20:22:29,882 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 [2020-10-15 20:22:29,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 20:22:29,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:29,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:29,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:29,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:29,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:22:29,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955712851] [2020-10-15 20:22:29,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:29,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:29,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:29,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:29,952 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-15 20:22:30,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:30,400 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-15 20:22:30,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:22:30,400 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:22:30,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:30,401 INFO L225 Difference]: With dead ends: 95 [2020-10-15 20:22:30,401 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 20:22:30,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:22:30,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 20:22:30,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-15 20:22:30,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 20:22:30,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-15 20:22:30,404 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-15 20:22:30,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:30,404 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-15 20:22:30,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:30,405 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-15 20:22:30,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:30,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:30,405 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:30,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-15 20:22:30,606 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:30,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:30,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-15 20:22:30,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:30,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082714869] [2020-10-15 20:22:30,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:30,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082714869] [2020-10-15 20:22:30,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277552140] [2020-10-15 20:22:30,721 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 [2020-10-15 20:22:30,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 20:22:30,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:30,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:30,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:30,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:30,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:30,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:22:30,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348391564] [2020-10-15 20:22:30,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:30,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:30,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:30,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:30,803 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-15 20:22:31,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:31,361 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-15 20:22:31,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:22:31,361 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:22:31,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:31,362 INFO L225 Difference]: With dead ends: 92 [2020-10-15 20:22:31,362 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 20:22:31,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:22:31,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 20:22:31,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-15 20:22:31,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:22:31,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-15 20:22:31,366 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-15 20:22:31,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:31,366 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-15 20:22:31,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-15 20:22:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:31,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:31,367 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:31,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:31,568 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:31,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:31,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-15 20:22:31,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:31,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115287632] [2020-10-15 20:22:31,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:31,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115287632] [2020-10-15 20:22:31,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375488549] [2020-10-15 20:22:31,669 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 [2020-10-15 20:22:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:31,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:31,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:31,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:31,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:22:31,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468867310] [2020-10-15 20:22:31,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:22:31,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:31,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:22:31,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:22:31,770 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-15 20:22:32,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:32,280 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-15 20:22:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:32,282 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:22:32,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:32,283 INFO L225 Difference]: With dead ends: 112 [2020-10-15 20:22:32,283 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 20:22:32,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:22:32,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 20:22:32,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-15 20:22:32,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:22:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-15 20:22:32,286 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-15 20:22:32,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:32,286 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-15 20:22:32,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:22:32,287 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-15 20:22:32,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:22:32,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:32,287 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:32,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:32,495 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:32,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:32,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-15 20:22:32,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:32,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859132380] [2020-10-15 20:22:32,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:32,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859132380] [2020-10-15 20:22:32,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683944339] [2020-10-15 20:22:32,604 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 [2020-10-15 20:22:32,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:32,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:32,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:22:32,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:32,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:32,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:32,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:22:32,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698305569] [2020-10-15 20:22:32,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:32,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:32,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:32,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:32,688 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-15 20:22:33,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:33,230 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-15 20:22:33,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:22:33,230 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:22:33,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:33,231 INFO L225 Difference]: With dead ends: 93 [2020-10-15 20:22:33,231 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:22:33,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 20:22:33,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:22:33,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-15 20:22:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 20:22:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-15 20:22:33,234 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-15 20:22:33,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:33,234 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-15 20:22:33,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:33,234 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-15 20:22:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:33,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:33,235 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:33,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:33,436 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:33,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:33,436 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-15 20:22:33,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:33,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151287124] [2020-10-15 20:22:33,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:33,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151287124] [2020-10-15 20:22:33,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506585422] [2020-10-15 20:22:33,593 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 [2020-10-15 20:22:33,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:22:33,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:33,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:33,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:33,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:33,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:22:33,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859490852] [2020-10-15 20:22:33,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:33,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:33,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:33,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:33,653 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-15 20:22:33,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:33,951 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-15 20:22:33,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:22:33,952 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:22:33,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:33,953 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:22:33,953 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:22:33,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:22:33,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:22:33,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-15 20:22:33,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:33,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:22:33,956 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 20:22:33,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:33,956 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:22:33,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:33,956 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:22:33,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:33,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:33,957 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:34,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:34,167 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:34,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:34,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-15 20:22:34,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:34,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418469563] [2020-10-15 20:22:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:34,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418469563] [2020-10-15 20:22:34,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698267772] [2020-10-15 20:22:34,334 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 [2020-10-15 20:22:34,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:34,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:34,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:34,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:34,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:34,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:34,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:34,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778437065] [2020-10-15 20:22:34,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:34,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:34,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:34,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:34,414 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 20:22:34,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:34,794 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-15 20:22:34,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:22:34,794 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:34,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:34,795 INFO L225 Difference]: With dead ends: 101 [2020-10-15 20:22:34,796 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 20:22:34,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:22:34,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 20:22:34,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-15 20:22:34,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:22:34,798 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 20:22:34,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:34,799 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:22:34,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:34,799 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:22:34,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:34,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:34,799 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:35,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:35,000 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:35,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:35,001 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-15 20:22:35,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:35,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683566786] [2020-10-15 20:22:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:35,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683566786] [2020-10-15 20:22:35,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564829249] [2020-10-15 20:22:35,148 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 [2020-10-15 20:22:35,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 20:22:35,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:35,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:35,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:35,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:35,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:22:35,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250556527] [2020-10-15 20:22:35,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:35,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:35,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:35,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:35,209 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 20:22:35,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:35,545 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-15 20:22:35,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:22:35,546 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:22:35,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:35,547 INFO L225 Difference]: With dead ends: 98 [2020-10-15 20:22:35,547 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 20:22:35,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:22:35,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 20:22:35,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-15 20:22:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:22:35,550 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 20:22:35,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:35,550 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:22:35,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:35,550 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:22:35,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:35,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:35,551 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:35,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:35,760 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:35,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:35,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-15 20:22:35,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:35,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380164178] [2020-10-15 20:22:35,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:35,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380164178] [2020-10-15 20:22:35,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291933884] [2020-10-15 20:22:35,913 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 [2020-10-15 20:22:35,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 20:22:35,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:35,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:35,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:35,978 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:35,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:35,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:35,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047025287] [2020-10-15 20:22:35,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:35,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:35,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:35,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:35,990 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 20:22:36,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:36,434 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-15 20:22:36,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:22:36,435 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:36,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:36,435 INFO L225 Difference]: With dead ends: 97 [2020-10-15 20:22:36,436 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 20:22:36,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:22:36,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 20:22:36,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-15 20:22:36,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:22:36,439 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 20:22:36,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:36,439 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:22:36,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:36,439 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:22:36,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:36,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:36,440 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:36,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:36,650 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:36,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:36,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-15 20:22:36,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:36,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621649926] [2020-10-15 20:22:36,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:36,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621649926] [2020-10-15 20:22:36,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608661167] [2020-10-15 20:22:36,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:22:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:36,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:36,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:36,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:36,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:22:36,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198750964] [2020-10-15 20:22:36,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:36,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:36,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:36,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:36,843 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 20:22:37,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:37,251 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-15 20:22:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:22:37,252 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:22:37,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:37,253 INFO L225 Difference]: With dead ends: 94 [2020-10-15 20:22:37,253 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 20:22:37,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:22:37,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 20:22:37,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-15 20:22:37,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:37,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:22:37,256 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 20:22:37,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:37,256 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:22:37,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:22:37,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:37,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:37,257 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:37,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-15 20:22:37,466 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:37,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:37,466 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-15 20:22:37,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:37,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700344114] [2020-10-15 20:22:37,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:37,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700344114] [2020-10-15 20:22:37,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280776139] [2020-10-15 20:22:37,607 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 [2020-10-15 20:22:37,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:37,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:37,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:37,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:37,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:37,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:37,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:37,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746429771] [2020-10-15 20:22:37,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:37,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:37,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:37,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:37,687 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 20:22:38,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:38,201 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-15 20:22:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:22:38,202 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:38,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:38,203 INFO L225 Difference]: With dead ends: 93 [2020-10-15 20:22:38,203 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 20:22:38,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:22:38,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 20:22:38,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-15 20:22:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:38,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:22:38,206 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 20:22:38,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:38,206 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:22:38,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:38,206 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:22:38,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:38,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:38,207 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:38,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:38,408 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:38,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:38,408 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-15 20:22:38,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:38,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712902847] [2020-10-15 20:22:38,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:38,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712902847] [2020-10-15 20:22:38,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116695388] [2020-10-15 20:22:38,535 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 [2020-10-15 20:22:38,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:22:38,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:38,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:38,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:38,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:38,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:22:38,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035717475] [2020-10-15 20:22:38,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:38,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:38,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:38,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:38,602 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 20:22:39,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:39,037 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-15 20:22:39,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:39,038 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:22:39,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:39,038 INFO L225 Difference]: With dead ends: 90 [2020-10-15 20:22:39,039 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 20:22:39,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 20:22:39,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 20:22:39,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-15 20:22:39,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:39,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:22:39,041 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 20:22:39,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:39,041 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:22:39,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:39,041 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:22:39,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:39,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:39,042 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:39,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-15 20:22:39,243 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:39,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:39,243 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-15 20:22:39,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:39,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669163436] [2020-10-15 20:22:39,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:39,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669163436] [2020-10-15 20:22:39,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956532932] [2020-10-15 20:22:39,387 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 [2020-10-15 20:22:39,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:39,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:39,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:39,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:39,450 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:39,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:39,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:39,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727715150] [2020-10-15 20:22:39,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:39,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:39,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:39,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:39,462 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 20:22:40,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:40,044 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-15 20:22:40,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:22:40,045 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:40,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:40,046 INFO L225 Difference]: With dead ends: 89 [2020-10-15 20:22:40,046 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 20:22:40,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:22:40,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 20:22:40,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-15 20:22:40,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:40,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:22:40,049 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 20:22:40,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:40,049 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:22:40,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:40,049 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:22:40,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:40,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:40,049 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:40,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:40,250 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:40,251 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-15 20:22:40,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:40,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916747997] [2020-10-15 20:22:40,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:40,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916747997] [2020-10-15 20:22:40,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796639008] [2020-10-15 20:22:40,366 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 [2020-10-15 20:22:40,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 20:22:40,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:40,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:40,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:40,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:40,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:22:40,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281154622] [2020-10-15 20:22:40,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:40,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:40,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:40,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:40,429 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 20:22:40,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:40,923 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-15 20:22:40,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:22:40,924 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:22:40,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:40,925 INFO L225 Difference]: With dead ends: 86 [2020-10-15 20:22:40,925 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 20:22:40,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:22:40,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 20:22:40,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-15 20:22:40,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:40,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:22:40,928 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 20:22:40,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:40,928 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:22:40,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:40,928 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:22:40,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:40,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:40,929 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:41,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:41,138 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:41,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:41,138 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-15 20:22:41,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:41,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157930518] [2020-10-15 20:22:41,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:41,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:41,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157930518] [2020-10-15 20:22:41,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101197975] [2020-10-15 20:22:41,268 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 [2020-10-15 20:22:41,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 20:22:41,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:41,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:41,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:41,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:41,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:41,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:41,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564164882] [2020-10-15 20:22:41,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:41,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:41,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:41,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:41,347 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 20:22:42,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:42,013 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-15 20:22:42,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:22:42,014 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:42,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:42,015 INFO L225 Difference]: With dead ends: 85 [2020-10-15 20:22:42,015 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 20:22:42,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:22:42,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 20:22:42,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-15 20:22:42,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:42,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:22:42,018 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 20:22:42,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:42,018 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:22:42,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:42,018 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:22:42,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:42,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:42,019 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:42,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:42,228 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:42,229 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-15 20:22:42,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:42,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296217515] [2020-10-15 20:22:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:42,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:42,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296217515] [2020-10-15 20:22:42,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156523096] [2020-10-15 20:22:42,355 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 [2020-10-15 20:22:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:42,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:42,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:42,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:42,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:22:42,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388008546] [2020-10-15 20:22:42,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:42,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:42,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:42,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:42,425 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 20:22:42,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:42,957 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-15 20:22:42,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:42,958 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:22:42,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:42,959 INFO L225 Difference]: With dead ends: 101 [2020-10-15 20:22:42,959 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 20:22:42,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 20:22:42,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 20:22:42,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-15 20:22:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 20:22:42,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-15 20:22:42,961 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-15 20:22:42,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:42,962 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-15 20:22:42,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:42,962 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-15 20:22:42,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:42,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:42,962 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:43,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:43,171 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:43,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:43,171 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-15 20:22:43,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:43,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745105960] [2020-10-15 20:22:43,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:43,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745105960] [2020-10-15 20:22:43,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451664303] [2020-10-15 20:22:43,292 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 [2020-10-15 20:22:43,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:43,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:43,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:43,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:43,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:43,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:43,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767901281] [2020-10-15 20:22:43,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:43,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:43,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:43,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:43,370 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-15 20:22:44,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:44,002 INFO L93 Difference]: Finished difference Result 80 states and 197 transitions. [2020-10-15 20:22:44,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:22:44,002 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:44,003 INFO L225 Difference]: With dead ends: 80 [2020-10-15 20:22:44,003 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 20:22:44,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:22:44,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 20:22:44,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-15 20:22:44,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 20:22:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-15 20:22:44,006 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-15 20:22:44,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:44,006 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-15 20:22:44,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:44,007 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-15 20:22:44,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:44,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:44,007 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:44,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:44,214 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:44,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:44,215 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-15 20:22:44,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:44,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905682021] [2020-10-15 20:22:44,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:44,330 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:44,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905682021] [2020-10-15 20:22:44,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256431139] [2020-10-15 20:22:44,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:22:44,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:22:44,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:44,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:44,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:44,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:22:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:44,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:44,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:44,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340279666] [2020-10-15 20:22:44,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:44,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:44,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:44,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:44,413 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-15 20:22:45,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:45,077 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-15 20:22:45,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:45,078 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:45,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:45,079 INFO L225 Difference]: With dead ends: 92 [2020-10-15 20:22:45,079 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 20:22:45,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:22:45,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 20:22:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-15 20:22:45,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:22:45,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-15 20:22:45,082 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-15 20:22:45,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:45,083 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-15 20:22:45,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:45,083 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-15 20:22:45,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:45,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:45,084 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:45,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:45,293 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:45,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:45,293 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-15 20:22:45,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:45,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293422752] [2020-10-15 20:22:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:45,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293422752] [2020-10-15 20:22:45,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482568099] [2020-10-15 20:22:45,444 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 [2020-10-15 20:22:45,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:45,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:45,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:45,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:45,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:22:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:45,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:45,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:45,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269672443] [2020-10-15 20:22:45,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:45,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:45,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:45,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:45,528 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-15 20:22:46,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:46,225 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-15 20:22:46,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:46,226 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:46,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:46,227 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:22:46,227 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 20:22:46,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:22:46,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 20:22:46,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-15 20:22:46,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 20:22:46,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-15 20:22:46,230 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-15 20:22:46,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:46,230 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-15 20:22:46,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:46,230 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-15 20:22:46,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:46,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:46,231 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:46,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-15 20:22:46,435 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:46,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:46,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-15 20:22:46,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:46,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599927845] [2020-10-15 20:22:46,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:46,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599927845] [2020-10-15 20:22:46,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724738498] [2020-10-15 20:22:46,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:22:46,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 20:22:46,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:46,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:46,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:46,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:46,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:46,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744557915] [2020-10-15 20:22:46,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:46,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:46,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:46,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:46,670 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-15 20:22:46,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:46,953 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-15 20:22:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:22:46,953 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:46,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:46,954 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:22:46,954 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 20:22:46,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:22:46,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 20:22:46,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-15 20:22:46,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:22:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-15 20:22:46,957 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-15 20:22:46,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:46,957 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-15 20:22:46,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:46,957 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-15 20:22:46,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:46,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:46,958 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:47,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:47,159 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:47,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:47,159 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-15 20:22:47,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:47,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133876615] [2020-10-15 20:22:47,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:47,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133876615] [2020-10-15 20:22:47,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331709117] [2020-10-15 20:22:47,345 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 [2020-10-15 20:22:47,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 20:22:47,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:47,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:47,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:47,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:47,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:47,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:47,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170021316] [2020-10-15 20:22:47,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:47,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:47,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:47,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:47,420 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-15 20:22:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:47,754 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-15 20:22:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:22:47,755 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:47,756 INFO L225 Difference]: With dead ends: 98 [2020-10-15 20:22:47,756 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 20:22:47,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:22:47,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 20:22:47,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-15 20:22:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 20:22:47,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-15 20:22:47,759 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-15 20:22:47,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:47,759 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-15 20:22:47,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:47,759 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-15 20:22:47,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:47,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:47,759 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:47,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-15 20:22:47,960 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:47,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:47,961 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-15 20:22:47,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:47,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245192107] [2020-10-15 20:22:47,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:48,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245192107] [2020-10-15 20:22:48,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847716318] [2020-10-15 20:22:48,139 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 [2020-10-15 20:22:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:48,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:48,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:48,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:48,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:48,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177809681] [2020-10-15 20:22:48,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:48,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:48,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:48,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:48,197 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-15 20:22:48,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:48,577 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-15 20:22:48,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:22:48,577 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:48,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:48,578 INFO L225 Difference]: With dead ends: 99 [2020-10-15 20:22:48,579 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 20:22:48,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:22:48,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 20:22:48,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-15 20:22:48,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:22:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-15 20:22:48,582 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-15 20:22:48,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:48,582 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-15 20:22:48,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:48,582 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-15 20:22:48,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:48,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:48,583 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:48,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:48,789 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:48,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-15 20:22:48,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:48,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927170840] [2020-10-15 20:22:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:48,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927170840] [2020-10-15 20:22:48,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914290093] [2020-10-15 20:22:48,961 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 [2020-10-15 20:22:49,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:49,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:49,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:49,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:49,023 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:49,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:49,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:49,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799875777] [2020-10-15 20:22:49,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:49,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:49,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:49,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:49,036 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-15 20:22:49,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:49,467 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-15 20:22:49,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:22:49,468 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:49,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:49,469 INFO L225 Difference]: With dead ends: 109 [2020-10-15 20:22:49,469 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:22:49,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 20:22:49,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:22:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-15 20:22:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:22:49,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-15 20:22:49,472 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-15 20:22:49,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:49,472 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-15 20:22:49,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-15 20:22:49,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:49,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:49,473 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:49,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:49,681 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:49,681 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-15 20:22:49,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:49,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121470351] [2020-10-15 20:22:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:49,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121470351] [2020-10-15 20:22:49,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500892016] [2020-10-15 20:22:49,844 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 [2020-10-15 20:22:49,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 20:22:49,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:49,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:49,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:49,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:49,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:49,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386085535] [2020-10-15 20:22:49,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:49,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:49,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:49,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:49,909 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-15 20:22:50,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:50,343 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-15 20:22:50,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:50,344 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:50,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:50,345 INFO L225 Difference]: With dead ends: 109 [2020-10-15 20:22:50,345 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:22:50,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:22:50,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:22:50,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-15 20:22:50,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 20:22:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-15 20:22:50,348 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-15 20:22:50,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:50,348 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-15 20:22:50,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-15 20:22:50,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:50,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:50,349 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:50,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-15 20:22:50,554 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:50,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:50,554 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-15 20:22:50,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:50,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836442998] [2020-10-15 20:22:50,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:50,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836442998] [2020-10-15 20:22:50,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606867975] [2020-10-15 20:22:50,724 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 [2020-10-15 20:22:50,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:50,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:50,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:50,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:50,794 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:50,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:50,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:50,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527390719] [2020-10-15 20:22:50,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:50,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:50,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:50,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:50,808 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-15 20:22:51,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:51,338 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-15 20:22:51,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:22:51,338 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:51,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:51,340 INFO L225 Difference]: With dead ends: 106 [2020-10-15 20:22:51,340 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 20:22:51,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:22:51,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 20:22:51,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-15 20:22:51,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:22:51,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-15 20:22:51,343 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-15 20:22:51,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:51,343 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-15 20:22:51,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:51,343 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-15 20:22:51,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:51,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:51,344 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:51,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-15 20:22:51,552 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:51,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:51,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-15 20:22:51,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:51,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117669515] [2020-10-15 20:22:51,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:51,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117669515] [2020-10-15 20:22:51,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273303422] [2020-10-15 20:22:51,715 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 [2020-10-15 20:22:51,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 20:22:51,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:51,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:51,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:51,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:51,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:51,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358718339] [2020-10-15 20:22:51,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:51,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:51,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:51,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:51,786 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-15 20:22:52,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:52,268 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-15 20:22:52,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:22:52,268 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:52,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:52,269 INFO L225 Difference]: With dead ends: 107 [2020-10-15 20:22:52,269 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:22:52,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:22:52,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:22:52,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-15 20:22:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 20:22:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-15 20:22:52,273 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-15 20:22:52,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:52,274 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-15 20:22:52,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:52,274 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-15 20:22:52,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:52,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:52,274 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:52,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:52,481 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:52,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:52,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-15 20:22:52,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:52,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425544307] [2020-10-15 20:22:52,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:52,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425544307] [2020-10-15 20:22:52,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290475258] [2020-10-15 20:22:52,634 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 [2020-10-15 20:22:52,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 20:22:52,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:52,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:52,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:52,699 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:52,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:52,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:52,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788924384] [2020-10-15 20:22:52,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:52,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:52,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:52,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:52,713 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-15 20:22:53,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:53,270 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-15 20:22:53,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:22:53,271 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:53,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:53,271 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:22:53,271 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:22:53,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 20:22:53,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:22:53,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-15 20:22:53,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:22:53,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-15 20:22:53,274 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-15 20:22:53,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:53,274 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-15 20:22:53,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:53,274 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-15 20:22:53,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:53,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:53,275 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:53,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-15 20:22:53,479 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:53,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:53,479 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-15 20:22:53,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:53,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140101797] [2020-10-15 20:22:53,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:53,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140101797] [2020-10-15 20:22:53,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131233169] [2020-10-15 20:22:53,625 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 [2020-10-15 20:22:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:53,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:53,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:53,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:53,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:53,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472776038] [2020-10-15 20:22:53,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:53,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:53,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:53,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:53,685 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-15 20:22:54,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:54,223 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-15 20:22:54,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:54,224 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:54,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:54,225 INFO L225 Difference]: With dead ends: 105 [2020-10-15 20:22:54,225 INFO L226 Difference]: Without dead ends: 99 [2020-10-15 20:22:54,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:22:54,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-15 20:22:54,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-15 20:22:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:54,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:22:54,228 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-15 20:22:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:54,229 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:22:54,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:22:54,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:54,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:54,229 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:54,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:54,439 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:54,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:54,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-15 20:22:54,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:54,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379685401] [2020-10-15 20:22:54,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:54,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379685401] [2020-10-15 20:22:54,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987961361] [2020-10-15 20:22:54,593 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 [2020-10-15 20:22:54,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:54,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:54,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:54,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:54,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:54,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:54,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:54,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752865873] [2020-10-15 20:22:54,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:54,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:54,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:54,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:54,675 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-15 20:22:55,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:55,345 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-15 20:22:55,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:22:55,345 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:55,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:55,346 INFO L225 Difference]: With dead ends: 102 [2020-10-15 20:22:55,346 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 20:22:55,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:22:55,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 20:22:55,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-15 20:22:55,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:55,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:22:55,348 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-15 20:22:55,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:55,348 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:22:55,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:55,349 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:22:55,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:55,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:55,349 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:55,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-15 20:22:55,550 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:55,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:55,550 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-15 20:22:55,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:55,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520138269] [2020-10-15 20:22:55,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:55,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520138269] [2020-10-15 20:22:55,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719000928] [2020-10-15 20:22:55,695 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 [2020-10-15 20:22:55,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 20:22:55,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:55,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:55,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:55,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:55,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:55,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301609690] [2020-10-15 20:22:55,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:55,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:55,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:55,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:55,761 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-15 20:22:56,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:56,331 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-15 20:22:56,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:22:56,332 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:56,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:56,333 INFO L225 Difference]: With dead ends: 103 [2020-10-15 20:22:56,333 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 20:22:56,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:22:56,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 20:22:56,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-15 20:22:56,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 20:22:56,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-15 20:22:56,336 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-15 20:22:56,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:56,336 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-15 20:22:56,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:56,336 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-15 20:22:56,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:56,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:56,336 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:56,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:56,537 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:56,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:56,538 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-15 20:22:56,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:56,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712273602] [2020-10-15 20:22:56,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:56,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712273602] [2020-10-15 20:22:56,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057477102] [2020-10-15 20:22:56,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:22:56,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:56,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:56,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:56,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:56,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:56,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:56,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:56,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684025103] [2020-10-15 20:22:56,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:56,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:56,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:56,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:56,767 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-15 20:22:57,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:57,512 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-15 20:22:57,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:22:57,512 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:57,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:57,513 INFO L225 Difference]: With dead ends: 100 [2020-10-15 20:22:57,513 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 20:22:57,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:22:57,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 20:22:57,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-15 20:22:57,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:22:57,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-15 20:22:57,516 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-15 20:22:57,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:57,517 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-15 20:22:57,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:57,517 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-15 20:22:57,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:57,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:57,517 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:57,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-15 20:22:57,725 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:57,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:57,725 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-15 20:22:57,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:57,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773005231] [2020-10-15 20:22:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:57,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773005231] [2020-10-15 20:22:57,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638894915] [2020-10-15 20:22:57,868 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 [2020-10-15 20:22:57,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 20:22:57,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:57,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:57,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:57,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:57,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:57,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10764999] [2020-10-15 20:22:57,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:57,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:57,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:57,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:57,959 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-15 20:22:58,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:58,666 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-15 20:22:58,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:22:58,667 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:58,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:58,667 INFO L225 Difference]: With dead ends: 120 [2020-10-15 20:22:58,667 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 20:22:58,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:22:58,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 20:22:58,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-15 20:22:58,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:22:58,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-15 20:22:58,670 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-15 20:22:58,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:58,670 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-15 20:22:58,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:58,671 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-15 20:22:58,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:58,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:58,671 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:58,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-15 20:22:58,879 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:58,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:58,880 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-15 20:22:58,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:58,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623679228] [2020-10-15 20:22:58,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:59,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623679228] [2020-10-15 20:22:59,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355498306] [2020-10-15 20:22:59,074 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 [2020-10-15 20:22:59,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 20:22:59,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:59,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:59,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:59,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:59,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:59,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618657102] [2020-10-15 20:22:59,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:59,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:59,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:59,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:59,204 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-15 20:23:00,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:00,002 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-15 20:23:00,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:23:00,003 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:23:00,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:00,003 INFO L225 Difference]: With dead ends: 101 [2020-10-15 20:23:00,003 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 20:23:00,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:23:00,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 20:23:00,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-15 20:23:00,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 20:23:00,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-15 20:23:00,006 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-15 20:23:00,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:00,007 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-15 20:23:00,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:23:00,007 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-15 20:23:00,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:00,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:00,007 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:00,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:00,208 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:00,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:00,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-15 20:23:00,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:00,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009313803] [2020-10-15 20:23:00,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:00,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009313803] [2020-10-15 20:23:00,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874022629] [2020-10-15 20:23:00,416 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 [2020-10-15 20:23:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:00,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:00,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:00,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:00,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:23:00,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668864241] [2020-10-15 20:23:00,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:23:00,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:00,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:23:00,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:23:00,473 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-15 20:23:00,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:00,835 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-15 20:23:00,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:23:00,835 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:23:00,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:00,836 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:23:00,836 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:23:00,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:23:00,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:23:00,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-15 20:23:00,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:23:00,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:23:00,839 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:23:00,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:00,839 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:23:00,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:23:00,839 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:23:00,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:00,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:00,840 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:01,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:01,043 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:01,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:01,044 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-15 20:23:01,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:01,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151395337] [2020-10-15 20:23:01,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:01,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151395337] [2020-10-15 20:23:01,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729705620] [2020-10-15 20:23:01,263 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 [2020-10-15 20:23:01,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:01,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:01,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:01,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:01,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:01,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:01,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:23:01,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588184367] [2020-10-15 20:23:01,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:01,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:01,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:01,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:01,350 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:23:01,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:01,801 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-15 20:23:01,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:23:01,802 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:23:01,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:01,802 INFO L225 Difference]: With dead ends: 111 [2020-10-15 20:23:01,802 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 20:23:01,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:23:01,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 20:23:01,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-15 20:23:01,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:23:01,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:23:01,805 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:23:01,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:01,805 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:23:01,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:01,805 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:23:01,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:01,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:01,806 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:02,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-15 20:23:02,011 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:02,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:02,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-15 20:23:02,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:02,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723059660] [2020-10-15 20:23:02,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:02,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723059660] [2020-10-15 20:23:02,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781482577] [2020-10-15 20:23:02,203 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 [2020-10-15 20:23:02,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 20:23:02,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:02,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:02,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:02,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:02,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:23:02,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398845225] [2020-10-15 20:23:02,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:23:02,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:02,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:23:02,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:23:02,264 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:23:02,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:02,681 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-15 20:23:02,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:23:02,682 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:23:02,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:02,683 INFO L225 Difference]: With dead ends: 108 [2020-10-15 20:23:02,683 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 20:23:02,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 20:23:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 20:23:02,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-15 20:23:02,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:23:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:23:02,685 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:23:02,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:02,685 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:23:02,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:23:02,685 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:23:02,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:02,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:02,686 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:02,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:02,895 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:02,895 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-15 20:23:02,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:02,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402847780] [2020-10-15 20:23:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:03,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402847780] [2020-10-15 20:23:03,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382999034] [2020-10-15 20:23:03,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:23:03,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:03,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:03,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:03,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:03,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:03,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:03,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:23:03,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173368547] [2020-10-15 20:23:03,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:03,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:03,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:03,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:03,176 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:23:03,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:03,680 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-15 20:23:03,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:23:03,680 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:23:03,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:03,681 INFO L225 Difference]: With dead ends: 107 [2020-10-15 20:23:03,682 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:23:03,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:23:03,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:23:03,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-15 20:23:03,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:23:03,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:23:03,685 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:23:03,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:03,685 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:23:03,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:03,685 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:23:03,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:03,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:03,686 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:03,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-15 20:23:03,894 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:03,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:03,894 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-15 20:23:03,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:03,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724123830] [2020-10-15 20:23:03,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:04,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724123830] [2020-10-15 20:23:04,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595652237] [2020-10-15 20:23:04,064 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 [2020-10-15 20:23:04,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 20:23:04,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:04,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:04,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:04,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:04,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:23:04,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601298700] [2020-10-15 20:23:04,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:23:04,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:04,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:23:04,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:23:04,129 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:23:04,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:04,614 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-15 20:23:04,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:23:04,614 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:23:04,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:04,615 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:23:04,615 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:23:04,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:23:04,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:23:04,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-15 20:23:04,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:23:04,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:23:04,618 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:23:04,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:04,618 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:23:04,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:23:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:23:04,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:04,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:04,619 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:04,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-15 20:23:04,821 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:04,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:04,821 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-15 20:23:04,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:04,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700925491] [2020-10-15 20:23:04,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:05,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700925491] [2020-10-15 20:23:05,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768568266] [2020-10-15 20:23:05,007 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 [2020-10-15 20:23:05,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 20:23:05,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:05,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:05,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:05,081 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:05,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:05,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:23:05,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678049039] [2020-10-15 20:23:05,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:05,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:05,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:05,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:05,097 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:23:05,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:05,725 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-15 20:23:05,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:23:05,725 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:23:05,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:05,726 INFO L225 Difference]: With dead ends: 103 [2020-10-15 20:23:05,726 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 20:23:05,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:23:05,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 20:23:05,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-15 20:23:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:23:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:23:05,729 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:23:05,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:05,729 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:23:05,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:05,729 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:23:05,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:05,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:05,730 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:05,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-15 20:23:05,936 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:05,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:05,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-15 20:23:05,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:05,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179780700] [2020-10-15 20:23:05,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:06,116 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:06,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179780700] [2020-10-15 20:23:06,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244618901] [2020-10-15 20:23:06,117 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 [2020-10-15 20:23:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:06,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:06,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:06,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:06,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:23:06,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921311852] [2020-10-15 20:23:06,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:23:06,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:06,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:23:06,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:23:06,179 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:23:06,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:06,718 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-15 20:23:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:23:06,719 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:23:06,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:06,719 INFO L225 Difference]: With dead ends: 100 [2020-10-15 20:23:06,720 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 20:23:06,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 20:23:06,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 20:23:06,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-15 20:23:06,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:23:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:23:06,722 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:23:06,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:06,722 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:23:06,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:23:06,723 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:23:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:06,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:06,723 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:06,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:06,929 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:06,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:06,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-15 20:23:06,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:06,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769181384] [2020-10-15 20:23:06,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:07,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769181384] [2020-10-15 20:23:07,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120849670] [2020-10-15 20:23:07,109 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 [2020-10-15 20:23:07,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:07,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:07,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:07,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:07,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:07,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:07,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:23:07,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83686961] [2020-10-15 20:23:07,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:07,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:07,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:07,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:07,189 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:23:07,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:07,885 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-15 20:23:07,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:23:07,886 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:23:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:07,886 INFO L225 Difference]: With dead ends: 99 [2020-10-15 20:23:07,886 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 20:23:07,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:23:07,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 20:23:07,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-15 20:23:07,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:23:07,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:23:07,890 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:23:07,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:07,890 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:23:07,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:07,890 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:23:07,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:07,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:07,891 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:08,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-15 20:23:08,100 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:08,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:08,100 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-15 20:23:08,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:08,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811961545] [2020-10-15 20:23:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:08,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811961545] [2020-10-15 20:23:08,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622264500] [2020-10-15 20:23:08,248 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 [2020-10-15 20:23:08,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 20:23:08,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:08,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:08,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:08,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:08,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:23:08,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003694429] [2020-10-15 20:23:08,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:23:08,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:08,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:23:08,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:23:08,319 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:23:08,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:08,900 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-15 20:23:08,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:23:08,901 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:23:08,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:08,901 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:23:08,901 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 20:23:08,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:23:08,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 20:23:08,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-15 20:23:08,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:23:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:23:08,905 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:23:08,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:08,905 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:23:08,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:23:08,905 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:23:08,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:08,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:08,906 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:09,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:09,116 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:09,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:09,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-15 20:23:09,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:09,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426909923] [2020-10-15 20:23:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:09,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426909923] [2020-10-15 20:23:09,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850924156] [2020-10-15 20:23:09,278 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 [2020-10-15 20:23:09,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:09,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:09,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:09,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:09,349 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:09,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:09,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:23:09,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288799512] [2020-10-15 20:23:09,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:09,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:09,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:09,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:09,363 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:23:10,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:10,139 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-15 20:23:10,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:23:10,140 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:23:10,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:10,141 INFO L225 Difference]: With dead ends: 95 [2020-10-15 20:23:10,141 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 20:23:10,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:23:10,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 20:23:10,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-15 20:23:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:23:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:23:10,143 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:23:10,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:10,144 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:23:10,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:10,144 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:23:10,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:10,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:10,144 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:10,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:10,345 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:10,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:10,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-15 20:23:10,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:10,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265065563] [2020-10-15 20:23:10,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:10,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265065563] [2020-10-15 20:23:10,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776718142] [2020-10-15 20:23:10,507 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 [2020-10-15 20:23:10,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 20:23:10,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:10,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:10,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:10,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:10,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:23:10,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399987753] [2020-10-15 20:23:10,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:23:10,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:10,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:23:10,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:23:10,573 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:23:11,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:11,222 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-15 20:23:11,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:23:11,223 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:23:11,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:11,224 INFO L225 Difference]: With dead ends: 92 [2020-10-15 20:23:11,224 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 20:23:11,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:23:11,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 20:23:11,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-15 20:23:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:23:11,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:23:11,227 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:23:11,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:11,227 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:23:11,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:23:11,227 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:23:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:11,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:11,228 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:11,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:11,436 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:11,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:11,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-15 20:23:11,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:11,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332070482] [2020-10-15 20:23:11,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:11,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332070482] [2020-10-15 20:23:11,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420166373] [2020-10-15 20:23:11,590 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 [2020-10-15 20:23:11,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 20:23:11,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:11,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:11,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:11,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:11,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:11,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:23:11,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597681676] [2020-10-15 20:23:11,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:11,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:11,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:11,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:11,698 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:23:12,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:12,683 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-15 20:23:12,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:23:12,683 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:23:12,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:12,684 INFO L225 Difference]: With dead ends: 91 [2020-10-15 20:23:12,684 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:23:12,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 20:23:12,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:23:12,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-15 20:23:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:23:12,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:23:12,686 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:23:12,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:12,687 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:23:12,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:23:12,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:12,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:12,687 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:12,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:12,888 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:12,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:12,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-15 20:23:12,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:12,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297632618] [2020-10-15 20:23:12,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:13,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297632618] [2020-10-15 20:23:13,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869864023] [2020-10-15 20:23:13,101 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 [2020-10-15 20:23:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:13,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:13,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:13,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:13,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:23:13,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149538952] [2020-10-15 20:23:13,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:23:13,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:13,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:23:13,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:23:13,189 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:23:13,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:13,874 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-15 20:23:13,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:23:13,875 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:23:13,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:13,875 INFO L225 Difference]: With dead ends: 107 [2020-10-15 20:23:13,875 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:23:13,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:23:13,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:23:13,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-15 20:23:13,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 20:23:13,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-15 20:23:13,878 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-15 20:23:13,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:13,878 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-15 20:23:13,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:23:13,878 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-15 20:23:13,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:13,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:13,879 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:14,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-15 20:23:14,080 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:14,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:14,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-15 20:23:14,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:14,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215502559] [2020-10-15 20:23:14,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:14,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215502559] [2020-10-15 20:23:14,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967027839] [2020-10-15 20:23:14,243 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 [2020-10-15 20:23:14,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:14,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:14,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:14,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:14,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:14,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:14,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:23:14,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116772967] [2020-10-15 20:23:14,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:14,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:14,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:14,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:14,351 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-15 20:23:15,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:15,229 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-15 20:23:15,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:23:15,230 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:23:15,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:15,231 INFO L225 Difference]: With dead ends: 88 [2020-10-15 20:23:15,231 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 20:23:15,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:23:15,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 20:23:15,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-15 20:23:15,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:23:15,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-15 20:23:15,233 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-15 20:23:15,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:15,233 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-15 20:23:15,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:15,233 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-15 20:23:15,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:23:15,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:15,233 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:15,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-15 20:23:15,434 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:15,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:15,435 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-15 20:23:15,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:15,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034784718] [2020-10-15 20:23:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:15,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034784718] [2020-10-15 20:23:15,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733248984] [2020-10-15 20:23:15,593 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 [2020-10-15 20:23:15,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 20:23:15,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:15,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:23:15,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:15,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:23:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:15,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:15,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:23:15,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067849351] [2020-10-15 20:23:15,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:15,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:15,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:15,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:15,688 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-15 20:23:16,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:16,516 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-15 20:23:16,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:23:16,517 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:23:16,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:16,517 INFO L225 Difference]: With dead ends: 100 [2020-10-15 20:23:16,517 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 20:23:16,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:23:16,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 20:23:16,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-15 20:23:16,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:23:16,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-15 20:23:16,520 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-15 20:23:16,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:16,520 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-15 20:23:16,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:16,520 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-15 20:23:16,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:16,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:16,521 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:16,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-15 20:23:16,722 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:16,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:16,722 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-15 20:23:16,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:16,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860434934] [2020-10-15 20:23:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:16,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860434934] [2020-10-15 20:23:16,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63741544] [2020-10-15 20:23:16,898 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 [2020-10-15 20:23:16,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:16,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:16,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:16,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:16,978 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:23:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:16,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:16,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:23:16,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167290101] [2020-10-15 20:23:16,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:16,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:16,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:16,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:16,994 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-15 20:23:17,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:17,888 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-15 20:23:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:23:17,888 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:23:17,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:17,889 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:23:17,889 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 20:23:17,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:23:17,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 20:23:17,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-15 20:23:17,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:23:17,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-15 20:23:17,892 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-15 20:23:17,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:17,892 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-15 20:23:17,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:17,892 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-15 20:23:17,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:17,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:17,892 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:18,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-15 20:23:18,093 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:18,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:18,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-15 20:23:18,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:18,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300114568] [2020-10-15 20:23:18,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:18,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300114568] [2020-10-15 20:23:18,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671138060] [2020-10-15 20:23:18,288 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 [2020-10-15 20:23:18,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:23:18,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:18,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:18,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:18,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:18,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:23:18,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008481922] [2020-10-15 20:23:18,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:18,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:18,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:18,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:18,350 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-15 20:23:18,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:18,722 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-15 20:23:18,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:23:18,722 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:23:18,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:18,723 INFO L225 Difference]: With dead ends: 90 [2020-10-15 20:23:18,723 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 20:23:18,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:23:18,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 20:23:18,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-15 20:23:18,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:23:18,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-15 20:23:18,725 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-15 20:23:18,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:18,726 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-15 20:23:18,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:18,726 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-15 20:23:18,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:18,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:18,726 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:18,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:18,932 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:18,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:18,932 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-15 20:23:18,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:18,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466995430] [2020-10-15 20:23:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:19,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466995430] [2020-10-15 20:23:19,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259852833] [2020-10-15 20:23:19,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:23:19,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:23:19,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:19,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:19,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:19,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:19,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:19,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:23:19,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691023169] [2020-10-15 20:23:19,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:19,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:19,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:19,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:19,254 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-15 20:23:19,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:19,688 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-15 20:23:19,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:23:19,688 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:23:19,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:19,689 INFO L225 Difference]: With dead ends: 106 [2020-10-15 20:23:19,689 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 20:23:19,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:23:19,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 20:23:19,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-15 20:23:19,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:23:19,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-15 20:23:19,692 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-15 20:23:19,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:19,692 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-15 20:23:19,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:19,693 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-15 20:23:19,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:19,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:19,693 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:19,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-15 20:23:19,895 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:19,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:19,895 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-15 20:23:19,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:19,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374537047] [2020-10-15 20:23:19,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:20,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374537047] [2020-10-15 20:23:20,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126158601] [2020-10-15 20:23:20,121 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 [2020-10-15 20:23:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:20,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:20,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:20,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:20,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:23:20,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594801493] [2020-10-15 20:23:20,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:20,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:20,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:20,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:20,180 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-15 20:23:20,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:20,662 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-15 20:23:20,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:23:20,663 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:23:20,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:20,663 INFO L225 Difference]: With dead ends: 107 [2020-10-15 20:23:20,664 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:23:20,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:23:20,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:23:20,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-15 20:23:20,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 20:23:20,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-15 20:23:20,667 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-15 20:23:20,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:20,667 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-15 20:23:20,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:20,667 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-15 20:23:20,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:20,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:20,668 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:20,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-15 20:23:20,876 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:20,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:20,876 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-15 20:23:20,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:20,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312460242] [2020-10-15 20:23:20,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:21,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312460242] [2020-10-15 20:23:21,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924627015] [2020-10-15 20:23:21,110 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 [2020-10-15 20:23:21,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:21,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:21,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:21,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:21,179 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:21,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:21,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:23:21,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813511906] [2020-10-15 20:23:21,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:21,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:21,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:21,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:21,191 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-15 20:23:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:21,700 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-15 20:23:21,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:23:21,701 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:23:21,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:21,701 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:23:21,701 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:23:21,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 20:23:21,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:23:21,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-15 20:23:21,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:23:21,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-15 20:23:21,704 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-15 20:23:21,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:21,705 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-15 20:23:21,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:21,705 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-15 20:23:21,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:21,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:21,706 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:21,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-15 20:23:21,914 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:21,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:21,914 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-15 20:23:21,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:21,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128581636] [2020-10-15 20:23:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:22,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128581636] [2020-10-15 20:23:22,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433625854] [2020-10-15 20:23:22,127 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 [2020-10-15 20:23:22,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 20:23:22,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:22,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:22,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:22,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:22,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:23:22,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40788961] [2020-10-15 20:23:22,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:22,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:22,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:22,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:22,197 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-15 20:23:22,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:22,730 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-15 20:23:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:23:22,731 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:23:22,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:22,731 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:23:22,731 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:23:22,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:23:22,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:23:22,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-15 20:23:22,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:23:22,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-15 20:23:22,734 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-15 20:23:22,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:22,734 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-15 20:23:22,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:22,734 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-15 20:23:22,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:22,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:22,735 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:22,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:22,941 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:22,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:22,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-15 20:23:22,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:22,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974229374] [2020-10-15 20:23:22,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:23,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974229374] [2020-10-15 20:23:23,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530169388] [2020-10-15 20:23:23,164 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 [2020-10-15 20:23:23,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:23,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:23,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:23,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:23,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:23,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:23,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:23:23,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404877012] [2020-10-15 20:23:23,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:23,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:23,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:23,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:23,251 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-15 20:23:23,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:23,987 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-15 20:23:23,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:23:23,988 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:23:23,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:23,989 INFO L225 Difference]: With dead ends: 116 [2020-10-15 20:23:23,989 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 20:23:23,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:23:23,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 20:23:23,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-15 20:23:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:23:23,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-15 20:23:23,993 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-15 20:23:23,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:23,993 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-15 20:23:23,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:23,994 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-15 20:23:23,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:23,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:23,994 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:24,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:24,204 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:24,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:24,205 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-15 20:23:24,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:24,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449102519] [2020-10-15 20:23:24,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:24,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:24,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449102519] [2020-10-15 20:23:24,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454268278] [2020-10-15 20:23:24,393 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 [2020-10-15 20:23:24,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:23:24,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:24,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:24,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:24,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:24,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:23:24,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290643631] [2020-10-15 20:23:24,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:24,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:24,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:24,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:24,469 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-15 20:23:25,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:25,036 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-15 20:23:25,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:23:25,036 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:23:25,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:25,037 INFO L225 Difference]: With dead ends: 117 [2020-10-15 20:23:25,037 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 20:23:25,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:23:25,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 20:23:25,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-15 20:23:25,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 20:23:25,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-15 20:23:25,039 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-15 20:23:25,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:25,039 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-15 20:23:25,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:25,039 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-15 20:23:25,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:25,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:25,039 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:25,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:25,240 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:25,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:25,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-15 20:23:25,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:25,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512623063] [2020-10-15 20:23:25,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:25,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512623063] [2020-10-15 20:23:25,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675266665] [2020-10-15 20:23:25,445 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 [2020-10-15 20:23:25,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:23:25,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:25,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:25,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:25,571 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:25,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:25,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:23:25,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367791565] [2020-10-15 20:23:25,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:25,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:25,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:25,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:25,590 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-15 20:23:26,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:26,238 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-15 20:23:26,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:23:26,239 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:23:26,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:26,240 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:23:26,240 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:23:26,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:23:26,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:23:26,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-15 20:23:26,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:23:26,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-15 20:23:26,242 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-15 20:23:26,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:26,243 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-15 20:23:26,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:26,243 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-15 20:23:26,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:26,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:26,243 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:26,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-15 20:23:26,452 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:26,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:26,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-15 20:23:26,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:26,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609426884] [2020-10-15 20:23:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:26,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609426884] [2020-10-15 20:23:26,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341177726] [2020-10-15 20:23:26,632 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 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 [2020-10-15 20:23:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:26,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:26,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:26,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:26,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:23:26,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001846567] [2020-10-15 20:23:26,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:26,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:26,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:26,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:26,692 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-15 20:23:27,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:27,334 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-15 20:23:27,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:23:27,335 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:23:27,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:27,336 INFO L225 Difference]: With dead ends: 115 [2020-10-15 20:23:27,336 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 20:23:27,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:23:27,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 20:23:27,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-15 20:23:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 20:23:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-15 20:23:27,338 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-15 20:23:27,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:27,339 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-15 20:23:27,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:27,339 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-15 20:23:27,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:27,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:27,339 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:27,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:27,540 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:27,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:27,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-15 20:23:27,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:27,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116830360] [2020-10-15 20:23:27,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:27,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116830360] [2020-10-15 20:23:27,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924409445] [2020-10-15 20:23:27,749 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 [2020-10-15 20:23:27,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:27,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:27,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:27,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:27,823 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:27,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:27,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:23:27,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888032087] [2020-10-15 20:23:27,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:27,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:27,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:27,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:27,838 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-15 20:23:28,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:28,610 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-15 20:23:28,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:23:28,611 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:23:28,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:28,612 INFO L225 Difference]: With dead ends: 112 [2020-10-15 20:23:28,612 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 20:23:28,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:23:28,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 20:23:28,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-15 20:23:28,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 20:23:28,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-15 20:23:28,614 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-15 20:23:28,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:28,614 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-15 20:23:28,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:28,615 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-15 20:23:28,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:28,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:28,615 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:28,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-15 20:23:28,816 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:28,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:28,816 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-15 20:23:28,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:28,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623445939] [2020-10-15 20:23:28,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:29,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623445939] [2020-10-15 20:23:29,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602867229] [2020-10-15 20:23:29,008 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 [2020-10-15 20:23:29,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 20:23:29,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:29,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:29,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:29,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:29,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:23:29,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002047065] [2020-10-15 20:23:29,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:29,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:29,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:29,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:29,074 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-15 20:23:29,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:29,753 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-15 20:23:29,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:23:29,753 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:23:29,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:29,754 INFO L225 Difference]: With dead ends: 113 [2020-10-15 20:23:29,754 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 20:23:29,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 20:23:29,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 20:23:29,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-15 20:23:29,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:23:29,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:23:29,757 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-15 20:23:29,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:29,757 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:23:29,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:29,758 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:23:29,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:29,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:29,758 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:29,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-15 20:23:29,959 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:29,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:29,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-15 20:23:29,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:29,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016922401] [2020-10-15 20:23:29,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:30,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016922401] [2020-10-15 20:23:30,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538623851] [2020-10-15 20:23:30,155 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 [2020-10-15 20:23:30,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:30,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:30,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:30,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:30,224 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:30,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:30,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:23:30,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100724337] [2020-10-15 20:23:30,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:30,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:30,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:30,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:30,239 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-15 20:23:31,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:31,087 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-15 20:23:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:23:31,088 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:23:31,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:31,089 INFO L225 Difference]: With dead ends: 110 [2020-10-15 20:23:31,089 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 20:23:31,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:23:31,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 20:23:31,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-15 20:23:31,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:23:31,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:23:31,091 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-15 20:23:31,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:31,091 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:23:31,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:31,092 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:23:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:31,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:31,092 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:31,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-15 20:23:31,293 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:31,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:31,293 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-15 20:23:31,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:31,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292995786] [2020-10-15 20:23:31,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:31,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292995786] [2020-10-15 20:23:31,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442103246] [2020-10-15 20:23:31,472 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 [2020-10-15 20:23:31,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:23:31,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:31,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:31,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:31,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:31,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:23:31,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102240233] [2020-10-15 20:23:31,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:31,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:31,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:31,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:31,547 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-15 20:23:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:32,390 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-15 20:23:32,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:23:32,391 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:23:32,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:32,392 INFO L225 Difference]: With dead ends: 111 [2020-10-15 20:23:32,392 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 20:23:32,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:23:32,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 20:23:32,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-15 20:23:32,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 20:23:32,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-15 20:23:32,394 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-15 20:23:32,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:32,395 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-15 20:23:32,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:32,395 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-15 20:23:32,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:32,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:32,396 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:32,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:32,596 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:32,597 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-15 20:23:32,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:32,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426364401] [2020-10-15 20:23:32,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:32,779 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:32,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426364401] [2020-10-15 20:23:32,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370025658] [2020-10-15 20:23:32,779 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 [2020-10-15 20:23:32,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:23:32,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:32,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:32,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:32,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:32,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:32,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:23:32,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865749797] [2020-10-15 20:23:32,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:32,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:32,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:32,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:32,867 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-15 20:23:33,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:33,746 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-15 20:23:33,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:23:33,747 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:23:33,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:33,747 INFO L225 Difference]: With dead ends: 108 [2020-10-15 20:23:33,748 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 20:23:33,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:23:33,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 20:23:33,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-15 20:23:33,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:23:33,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-15 20:23:33,750 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-15 20:23:33,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:33,751 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-15 20:23:33,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:33,751 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-15 20:23:33,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:33,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:33,751 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:33,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-15 20:23:33,960 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:33,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:33,961 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-15 20:23:33,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:33,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136852229] [2020-10-15 20:23:33,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:34,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136852229] [2020-10-15 20:23:34,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209832872] [2020-10-15 20:23:34,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:23:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:34,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:23:34,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:34,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:34,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:23:34,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711192302] [2020-10-15 20:23:34,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:23:34,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:34,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:23:34,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:23:34,200 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-15 20:23:34,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:34,965 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-15 20:23:34,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:23:34,966 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:23:34,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:34,966 INFO L225 Difference]: With dead ends: 128 [2020-10-15 20:23:34,966 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 20:23:34,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:23:34,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 20:23:34,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-15 20:23:34,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:23:34,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-15 20:23:34,969 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-15 20:23:34,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:34,970 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-15 20:23:34,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:23:34,970 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-15 20:23:34,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:23:34,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:34,970 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:35,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:35,171 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:35,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:35,171 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-15 20:23:35,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:35,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377930199] [2020-10-15 20:23:35,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:35,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377930199] [2020-10-15 20:23:35,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728021718] [2020-10-15 20:23:35,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:23:35,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:35,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:35,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:35,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:35,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:35,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:23:35,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850890801] [2020-10-15 20:23:35,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:35,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:35,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:35,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:35,431 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-15 20:23:36,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:36,368 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-15 20:23:36,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:23:36,369 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:23:36,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:36,369 INFO L225 Difference]: With dead ends: 109 [2020-10-15 20:23:36,369 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:23:36,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=733, Invalid=1817, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:23:36,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:23:36,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-15 20:23:36,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 20:23:36,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-15 20:23:36,372 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-15 20:23:36,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:36,372 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-15 20:23:36,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:36,372 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-15 20:23:36,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:36,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:36,372 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:36,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:36,573 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:36,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:36,574 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-15 20:23:36,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:36,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325060668] [2020-10-15 20:23:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:36,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325060668] [2020-10-15 20:23:36,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397235795] [2020-10-15 20:23:36,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:23:36,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 20:23:36,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:36,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:36,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:36,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:36,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:36,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268654945] [2020-10-15 20:23:36,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:36,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:36,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:36,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:36,902 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-15 20:23:37,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:37,352 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-15 20:23:37,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:23:37,353 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:37,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:37,354 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:23:37,354 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 20:23:37,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:23:37,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 20:23:37,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-15 20:23:37,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:37,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:37,356 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:37,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:37,357 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:37,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:37,357 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:37,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:37,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:37,357 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:37,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:37,558 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:37,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:37,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-15 20:23:37,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:37,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893896556] [2020-10-15 20:23:37,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:37,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893896556] [2020-10-15 20:23:37,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888658022] [2020-10-15 20:23:37,829 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 [2020-10-15 20:23:37,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:37,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:37,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:37,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:37,897 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:37,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:37,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:37,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537841676] [2020-10-15 20:23:37,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:37,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:37,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:37,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:37,910 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:38,457 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-15 20:23:38,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:23:38,458 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:38,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:38,459 INFO L225 Difference]: With dead ends: 121 [2020-10-15 20:23:38,459 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 20:23:38,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:23:38,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 20:23:38,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-15 20:23:38,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:38,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:38,461 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:38,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:38,462 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:38,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:38,462 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:38,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:38,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:38,462 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:38,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:38,663 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:38,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:38,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-15 20:23:38,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:38,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994132852] [2020-10-15 20:23:38,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:38,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994132852] [2020-10-15 20:23:38,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261446690] [2020-10-15 20:23:38,915 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 [2020-10-15 20:23:38,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:23:38,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:38,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:38,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:38,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:38,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:38,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71354591] [2020-10-15 20:23:38,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:38,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:38,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:38,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:38,981 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:39,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:39,493 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-15 20:23:39,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:23:39,494 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:39,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:39,494 INFO L225 Difference]: With dead ends: 118 [2020-10-15 20:23:39,495 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 20:23:39,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 20:23:39,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 20:23:39,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-15 20:23:39,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:39,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:39,498 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:39,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:39,498 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:39,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:39,499 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:39,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:39,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:39,499 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:39,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:39,705 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:39,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:39,705 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-15 20:23:39,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:39,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900951521] [2020-10-15 20:23:39,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:39,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900951521] [2020-10-15 20:23:39,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590920590] [2020-10-15 20:23:39,947 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 [2020-10-15 20:23:39,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:23:39,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:39,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:40,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:40,022 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:40,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:40,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:40,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917411370] [2020-10-15 20:23:40,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:40,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:40,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:40,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:40,036 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:40,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:40,646 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-15 20:23:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:23:40,646 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:40,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:40,647 INFO L225 Difference]: With dead ends: 117 [2020-10-15 20:23:40,647 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 20:23:40,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:23:40,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 20:23:40,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-15 20:23:40,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:40,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:40,650 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:40,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:40,650 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:40,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:40,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:40,651 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:40,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-15 20:23:40,852 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:40,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:40,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-15 20:23:40,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:40,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995226451] [2020-10-15 20:23:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:41,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995226451] [2020-10-15 20:23:41,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222100387] [2020-10-15 20:23:41,081 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 [2020-10-15 20:23:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:41,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:41,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:41,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:41,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:41,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562283656] [2020-10-15 20:23:41,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:41,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:41,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:41,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:41,140 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:41,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:41,687 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-15 20:23:41,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:23:41,687 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:41,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:41,688 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:23:41,688 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:23:41,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:23:41,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:23:41,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-15 20:23:41,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:41,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:41,691 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:41,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:41,691 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:41,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:41,691 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:41,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:41,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:41,691 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:41,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-15 20:23:41,895 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:41,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:41,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-15 20:23:41,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:41,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454427939] [2020-10-15 20:23:41,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:42,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454427939] [2020-10-15 20:23:42,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966892494] [2020-10-15 20:23:42,127 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 [2020-10-15 20:23:42,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:42,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:42,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:42,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:42,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:42,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:42,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:42,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757795669] [2020-10-15 20:23:42,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:42,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:42,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:42,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:42,210 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:42,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:42,948 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-15 20:23:42,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:23:42,949 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:42,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:42,950 INFO L225 Difference]: With dead ends: 113 [2020-10-15 20:23:42,950 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 20:23:42,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:23:42,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 20:23:42,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-15 20:23:42,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:42,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:42,952 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:42,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:42,953 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:42,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:42,953 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:42,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:42,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:42,953 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:43,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-15 20:23:43,162 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:43,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:43,162 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-15 20:23:43,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:43,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425262552] [2020-10-15 20:23:43,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:43,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425262552] [2020-10-15 20:23:43,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762373577] [2020-10-15 20:23:43,380 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 [2020-10-15 20:23:43,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 20:23:43,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:43,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:43,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:43,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:43,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:43,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578556069] [2020-10-15 20:23:43,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:43,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:43,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:43,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:43,452 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:44,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:44,092 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-15 20:23:44,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:23:44,093 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:44,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:44,094 INFO L225 Difference]: With dead ends: 110 [2020-10-15 20:23:44,094 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 20:23:44,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:23:44,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 20:23:44,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-15 20:23:44,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:44,097 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:44,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:44,097 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:44,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:44,097 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:44,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:44,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:44,098 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:44,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-15 20:23:44,298 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:44,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:44,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-15 20:23:44,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:44,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377578264] [2020-10-15 20:23:44,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:44,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377578264] [2020-10-15 20:23:44,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076451921] [2020-10-15 20:23:44,531 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 [2020-10-15 20:23:44,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:44,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:44,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:44,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:44,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:44,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:44,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:44,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046356396] [2020-10-15 20:23:44,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:44,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:44,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:44,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:44,619 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:45,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:45,435 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-15 20:23:45,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:23:45,436 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:45,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:45,436 INFO L225 Difference]: With dead ends: 109 [2020-10-15 20:23:45,436 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:23:45,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 20:23:45,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:23:45,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-15 20:23:45,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:45,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:45,438 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:45,439 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:45,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:45,439 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:45,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:45,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:45,439 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:45,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:45,640 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:45,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:45,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-15 20:23:45,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:45,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986471358] [2020-10-15 20:23:45,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:45,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986471358] [2020-10-15 20:23:45,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244552482] [2020-10-15 20:23:45,855 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 [2020-10-15 20:23:45,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:23:45,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:45,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:45,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:45,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:45,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:45,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716371466] [2020-10-15 20:23:45,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:45,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:45,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:45,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:45,928 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:46,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:46,621 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-15 20:23:46,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:23:46,622 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:46,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:46,622 INFO L225 Difference]: With dead ends: 106 [2020-10-15 20:23:46,623 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 20:23:46,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:23:46,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 20:23:46,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-15 20:23:46,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:46,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:46,625 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:46,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:46,625 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:46,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:46,625 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:46,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:46,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:46,626 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:46,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-15 20:23:46,826 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:46,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:46,827 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-15 20:23:46,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:46,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552170447] [2020-10-15 20:23:46,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:47,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552170447] [2020-10-15 20:23:47,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920015271] [2020-10-15 20:23:47,035 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 [2020-10-15 20:23:47,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:23:47,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:47,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:47,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:47,109 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:47,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:47,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:47,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208528371] [2020-10-15 20:23:47,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:47,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:47,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:47,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:47,126 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:48,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:48,037 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-15 20:23:48,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:23:48,038 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:48,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:48,039 INFO L225 Difference]: With dead ends: 105 [2020-10-15 20:23:48,039 INFO L226 Difference]: Without dead ends: 99 [2020-10-15 20:23:48,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:23:48,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-15 20:23:48,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-15 20:23:48,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:48,041 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:48,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:48,041 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:48,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:48,041 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:48,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:48,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:48,041 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:48,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:48,242 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:48,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:48,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-15 20:23:48,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:48,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473348423] [2020-10-15 20:23:48,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:48,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473348423] [2020-10-15 20:23:48,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97779257] [2020-10-15 20:23:48,449 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 [2020-10-15 20:23:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:48,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:48,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:48,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:48,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:48,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430518524] [2020-10-15 20:23:48,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:48,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:48,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:48,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:48,525 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:49,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:49,265 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-15 20:23:49,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:23:49,266 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:49,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:49,267 INFO L225 Difference]: With dead ends: 102 [2020-10-15 20:23:49,267 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 20:23:49,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:23:49,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 20:23:49,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-15 20:23:49,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:49,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:49,269 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:49,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:49,269 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:49,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:49,270 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:49,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:49,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:49,270 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:49,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:49,471 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:49,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:49,471 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-15 20:23:49,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:49,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801833558] [2020-10-15 20:23:49,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:49,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801833558] [2020-10-15 20:23:49,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285087023] [2020-10-15 20:23:49,671 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 [2020-10-15 20:23:49,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:49,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:49,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:49,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:49,739 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:49,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:49,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:49,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940685551] [2020-10-15 20:23:49,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:49,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:49,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:49,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:49,755 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:50,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:50,723 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-15 20:23:50,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:23:50,724 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:50,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:50,725 INFO L225 Difference]: With dead ends: 101 [2020-10-15 20:23:50,725 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 20:23:50,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:23:50,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 20:23:50,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-15 20:23:50,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:50,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:50,727 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:50,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:50,728 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:50,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:50,728 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:50,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:50,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:50,728 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:50,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-15 20:23:50,933 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:50,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:50,933 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-15 20:23:50,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:50,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307788535] [2020-10-15 20:23:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:51,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307788535] [2020-10-15 20:23:51,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226947578] [2020-10-15 20:23:51,124 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 [2020-10-15 20:23:51,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 20:23:51,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:51,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:51,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:51,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:51,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:51,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696049721] [2020-10-15 20:23:51,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:51,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:51,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:51,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:51,204 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:52,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:52,039 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-15 20:23:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:23:52,040 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:52,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:52,041 INFO L225 Difference]: With dead ends: 98 [2020-10-15 20:23:52,041 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 20:23:52,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:23:52,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 20:23:52,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-15 20:23:52,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:52,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:52,044 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:52,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:52,044 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:52,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:52,044 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:52,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:52,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:52,045 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:52,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:52,245 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:52,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:52,246 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-15 20:23:52,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:52,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271733071] [2020-10-15 20:23:52,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:52,447 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:52,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271733071] [2020-10-15 20:23:52,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819037281] [2020-10-15 20:23:52,448 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 [2020-10-15 20:23:52,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:52,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:52,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:52,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:52,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:52,535 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:52,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:52,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:52,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516772741] [2020-10-15 20:23:52,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:52,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:52,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:52,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:52,537 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:53,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:53,637 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-15 20:23:53,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:23:53,638 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:53,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:53,638 INFO L225 Difference]: With dead ends: 97 [2020-10-15 20:23:53,638 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 20:23:53,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:23:53,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 20:23:53,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-15 20:23:53,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:53,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:53,641 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:53,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:53,641 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:53,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:53,641 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:53,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:53,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:53,642 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:53,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-15 20:23:53,842 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:53,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:53,843 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-15 20:23:53,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:53,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623570662] [2020-10-15 20:23:53,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:54,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623570662] [2020-10-15 20:23:54,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335805829] [2020-10-15 20:23:54,046 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 [2020-10-15 20:23:54,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:23:54,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:54,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:54,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:54,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:54,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:54,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051977366] [2020-10-15 20:23:54,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:54,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:54,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:54,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:54,120 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:55,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:55,005 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-15 20:23:55,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:23:55,006 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:55,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:55,007 INFO L225 Difference]: With dead ends: 113 [2020-10-15 20:23:55,007 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 20:23:55,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:23:55,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 20:23:55,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-15 20:23:55,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 20:23:55,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-15 20:23:55,009 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-15 20:23:55,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:55,010 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-15 20:23:55,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:55,010 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-15 20:23:55,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:55,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:55,010 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:55,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-15 20:23:55,211 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:55,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:55,211 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-15 20:23:55,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:55,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23045626] [2020-10-15 20:23:55,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:55,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23045626] [2020-10-15 20:23:55,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406546275] [2020-10-15 20:23:55,418 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 [2020-10-15 20:23:55,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:23:55,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:55,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:55,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:55,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:55,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:55,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:55,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136528013] [2020-10-15 20:23:55,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:55,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:55,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:55,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:55,518 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-15 20:23:56,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:56,605 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-10-15 20:23:56,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:23:56,606 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:56,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:56,606 INFO L225 Difference]: With dead ends: 94 [2020-10-15 20:23:56,606 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 20:23:56,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:23:56,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 20:23:56,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-10-15 20:23:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 20:23:56,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-15 20:23:56,609 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-15 20:23:56,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:56,609 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-15 20:23:56,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:56,609 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-15 20:23:56,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:56,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:56,610 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:56,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-15 20:23:56,811 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:56,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:56,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-15 20:23:56,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:56,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224009258] [2020-10-15 20:23:56,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:57,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224009258] [2020-10-15 20:23:57,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073417150] [2020-10-15 20:23:57,018 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 [2020-10-15 20:23:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:57,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:57,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:57,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:23:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:57,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:57,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:57,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606768700] [2020-10-15 20:23:57,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:57,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:57,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:57,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:57,111 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-15 20:23:58,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:58,142 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-15 20:23:58,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:23:58,143 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:58,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:58,143 INFO L225 Difference]: With dead ends: 108 [2020-10-15 20:23:58,143 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:23:58,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:23:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:23:58,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-15 20:23:58,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:23:58,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-15 20:23:58,146 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-15 20:23:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:58,146 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-15 20:23:58,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:58,146 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-15 20:23:58,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:58,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:58,146 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:58,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-15 20:23:58,347 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:58,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:58,347 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-15 20:23:58,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:58,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538384534] [2020-10-15 20:23:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:58,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538384534] [2020-10-15 20:23:58,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919038528] [2020-10-15 20:23:58,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:23:58,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:58,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:58,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:58,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:58,644 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:23:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:58,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:58,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:58,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913012659] [2020-10-15 20:23:58,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:58,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:58,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:58,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:58,671 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-15 20:23:59,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:59,792 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-15 20:23:59,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:23:59,792 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:59,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:59,793 INFO L225 Difference]: With dead ends: 90 [2020-10-15 20:23:59,793 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:23:59,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:23:59,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:23:59,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-15 20:23:59,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:23:59,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-15 20:23:59,796 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-15 20:23:59,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:59,796 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-15 20:23:59,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:59,796 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-15 20:23:59,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:59,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:59,797 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:59,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:59,998 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:59,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:59,998 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-15 20:23:59,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:59,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595287313] [2020-10-15 20:23:59,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:00,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595287313] [2020-10-15 20:24:00,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666376945] [2020-10-15 20:24:00,295 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 [2020-10-15 20:24:00,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:24:00,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:00,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:00,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:00,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:00,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:24:00,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547512228] [2020-10-15 20:24:00,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:24:00,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:00,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:24:00,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:24:00,357 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-15 20:24:00,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:00,833 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-15 20:24:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:24:00,834 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:24:00,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:00,835 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:24:00,835 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 20:24:00,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:24:00,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 20:24:00,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-15 20:24:00,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:24:00,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-15 20:24:00,837 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-15 20:24:00,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:00,837 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-15 20:24:00,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:24:00,837 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-15 20:24:00,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:00,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:00,838 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:01,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:01,038 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:01,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:01,039 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-15 20:24:01,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:01,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047616345] [2020-10-15 20:24:01,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:01,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047616345] [2020-10-15 20:24:01,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294883286] [2020-10-15 20:24:01,328 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 [2020-10-15 20:24:01,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:01,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:01,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:01,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:01,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:01,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:01,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:24:01,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022525038] [2020-10-15 20:24:01,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:01,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:01,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:01,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:01,413 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-15 20:24:01,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:01,960 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-15 20:24:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:24:01,960 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:24:01,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:01,961 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:24:01,961 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:24:01,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:24:01,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:24:01,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-15 20:24:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:24:01,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-15 20:24:01,963 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-15 20:24:01,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:01,964 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-15 20:24:01,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-15 20:24:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:01,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:01,964 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:02,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:02,165 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:02,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:02,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-15 20:24:02,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:02,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092746877] [2020-10-15 20:24:02,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:02,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092746877] [2020-10-15 20:24:02,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942072048] [2020-10-15 20:24:02,460 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 [2020-10-15 20:24:02,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:24:02,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:02,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:02,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:02,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:02,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:24:02,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734372897] [2020-10-15 20:24:02,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:24:02,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:02,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:24:02,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:24:02,524 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-15 20:24:03,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:03,112 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-15 20:24:03,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:24:03,112 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:24:03,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:03,113 INFO L225 Difference]: With dead ends: 115 [2020-10-15 20:24:03,113 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 20:24:03,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:24:03,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 20:24:03,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-15 20:24:03,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 20:24:03,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-15 20:24:03,115 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-15 20:24:03,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:03,115 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-15 20:24:03,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:24:03,116 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-15 20:24:03,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:03,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:03,116 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:03,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:03,317 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:03,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:03,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-15 20:24:03,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:03,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777715831] [2020-10-15 20:24:03,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:03,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777715831] [2020-10-15 20:24:03,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385610714] [2020-10-15 20:24:03,611 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 [2020-10-15 20:24:03,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:24:03,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:03,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:03,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:03,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:03,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:03,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:24:03,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438969049] [2020-10-15 20:24:03,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:03,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:03,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:03,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:03,701 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-15 20:24:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:04,315 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-15 20:24:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:24:04,315 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:24:04,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:04,316 INFO L225 Difference]: With dead ends: 129 [2020-10-15 20:24:04,316 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 20:24:04,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:24:04,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 20:24:04,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-15 20:24:04,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:24:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-15 20:24:04,319 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-15 20:24:04,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:04,319 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-15 20:24:04,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:04,320 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-15 20:24:04,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:04,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:04,320 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:04,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:04,529 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:04,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:04,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-15 20:24:04,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:04,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454749595] [2020-10-15 20:24:04,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:04,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454749595] [2020-10-15 20:24:04,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400287157] [2020-10-15 20:24:04,802 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 [2020-10-15 20:24:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:04,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:04,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:04,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:04,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:24:04,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807790536] [2020-10-15 20:24:04,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:24:04,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:04,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:24:04,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:24:04,865 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-15 20:24:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:05,489 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-15 20:24:05,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:24:05,489 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:24:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:05,490 INFO L225 Difference]: With dead ends: 129 [2020-10-15 20:24:05,490 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 20:24:05,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:24:05,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 20:24:05,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-15 20:24:05,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 20:24:05,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-15 20:24:05,492 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-15 20:24:05,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:05,493 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-15 20:24:05,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:24:05,493 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-15 20:24:05,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:05,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:05,493 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:05,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:05,694 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:05,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:05,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-15 20:24:05,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:05,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678577057] [2020-10-15 20:24:05,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:05,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678577057] [2020-10-15 20:24:05,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117207128] [2020-10-15 20:24:05,972 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 [2020-10-15 20:24:06,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:06,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:06,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:06,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:06,045 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:06,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:06,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:24:06,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108345079] [2020-10-15 20:24:06,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:06,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:06,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:06,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:06,058 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-15 20:24:06,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:06,782 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-15 20:24:06,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:24:06,783 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:24:06,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:06,783 INFO L225 Difference]: With dead ends: 126 [2020-10-15 20:24:06,783 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 20:24:06,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:24:06,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 20:24:06,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-15 20:24:06,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 20:24:06,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-15 20:24:06,786 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-15 20:24:06,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:06,786 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-15 20:24:06,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:06,786 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-15 20:24:06,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:06,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:06,787 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:06,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:06,987 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:06,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:06,988 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-15 20:24:06,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:06,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418301725] [2020-10-15 20:24:06,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:06,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:07,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418301725] [2020-10-15 20:24:07,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469524687] [2020-10-15 20:24:07,253 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 [2020-10-15 20:24:07,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:24:07,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:07,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:07,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:07,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:07,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:24:07,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604127820] [2020-10-15 20:24:07,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:24:07,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:07,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:24:07,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:24:07,322 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-15 20:24:08,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:08,017 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-15 20:24:08,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:24:08,017 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:24:08,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:08,018 INFO L225 Difference]: With dead ends: 127 [2020-10-15 20:24:08,018 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 20:24:08,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 20:24:08,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 20:24:08,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-15 20:24:08,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:24:08,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-15 20:24:08,020 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-15 20:24:08,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:08,020 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-15 20:24:08,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:24:08,020 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-15 20:24:08,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:08,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:08,021 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:08,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-15 20:24:08,221 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:08,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:08,222 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-15 20:24:08,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:08,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908893448] [2020-10-15 20:24:08,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:08,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908893448] [2020-10-15 20:24:08,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912852539] [2020-10-15 20:24:08,476 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 [2020-10-15 20:24:08,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:08,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:08,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:08,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:08,544 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:08,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:08,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:24:08,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909821866] [2020-10-15 20:24:08,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:08,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:08,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:08,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:08,560 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-15 20:24:09,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:09,360 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-15 20:24:09,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:24:09,361 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:24:09,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:09,361 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:24:09,362 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 20:24:09,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:24:09,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 20:24:09,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-15 20:24:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:24:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-15 20:24:09,364 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-15 20:24:09,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:09,365 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-15 20:24:09,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-15 20:24:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:09,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:09,365 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:09,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-15 20:24:09,566 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:09,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:09,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-15 20:24:09,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:09,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530530580] [2020-10-15 20:24:09,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:09,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:09,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530530580] [2020-10-15 20:24:09,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521824563] [2020-10-15 20:24:09,817 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 [2020-10-15 20:24:09,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:24:09,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:09,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:09,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:09,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:09,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:24:09,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100855673] [2020-10-15 20:24:09,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:24:09,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:09,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:24:09,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:24:09,887 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-15 20:24:10,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:10,613 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-15 20:24:10,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:24:10,614 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:24:10,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:10,614 INFO L225 Difference]: With dead ends: 125 [2020-10-15 20:24:10,614 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 20:24:10,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:24:10,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 20:24:10,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-15 20:24:10,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 20:24:10,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-15 20:24:10,616 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-15 20:24:10,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:10,617 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-15 20:24:10,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:24:10,617 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-15 20:24:10,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:10,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:10,617 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:10,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-15 20:24:10,818 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:10,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:10,819 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-15 20:24:10,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:10,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371278188] [2020-10-15 20:24:10,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:11,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371278188] [2020-10-15 20:24:11,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236151842] [2020-10-15 20:24:11,074 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 [2020-10-15 20:24:11,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:24:11,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:11,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:11,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:11,153 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:11,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:11,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:24:11,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937356343] [2020-10-15 20:24:11,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:11,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:11,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:11,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:11,170 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-15 20:24:12,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:12,069 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-15 20:24:12,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:24:12,070 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:24:12,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:12,070 INFO L225 Difference]: With dead ends: 122 [2020-10-15 20:24:12,070 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 20:24:12,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:24:12,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 20:24:12,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-15 20:24:12,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:24:12,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-15 20:24:12,073 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-15 20:24:12,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:12,073 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-15 20:24:12,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:12,073 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-15 20:24:12,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:12,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:12,074 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:12,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-15 20:24:12,275 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:12,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:12,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-15 20:24:12,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:12,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255005538] [2020-10-15 20:24:12,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:12,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255005538] [2020-10-15 20:24:12,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158511688] [2020-10-15 20:24:12,515 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 [2020-10-15 20:24:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:12,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:12,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:12,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:12,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:24:12,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387291390] [2020-10-15 20:24:12,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:24:12,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:12,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:24:12,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:24:12,582 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-15 20:24:13,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:13,412 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-15 20:24:13,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:24:13,413 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:24:13,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:13,413 INFO L225 Difference]: With dead ends: 123 [2020-10-15 20:24:13,413 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 20:24:13,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:24:13,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 20:24:13,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-15 20:24:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 20:24:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-15 20:24:13,416 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-15 20:24:13,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:13,416 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-15 20:24:13,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:24:13,416 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-15 20:24:13,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:13,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:13,417 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:13,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:13,617 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:13,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:13,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-15 20:24:13,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:13,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132353483] [2020-10-15 20:24:13,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:13,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132353483] [2020-10-15 20:24:13,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191183227] [2020-10-15 20:24:13,853 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 [2020-10-15 20:24:13,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:13,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:13,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:13,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:13,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:13,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:13,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:24:13,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924020333] [2020-10-15 20:24:13,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:13,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:13,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:13,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:13,946 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-15 20:24:14,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:14,935 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-15 20:24:14,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:24:14,937 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:24:14,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:14,937 INFO L225 Difference]: With dead ends: 120 [2020-10-15 20:24:14,937 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 20:24:14,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:24:14,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 20:24:14,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-15 20:24:14,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 20:24:14,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-15 20:24:14,939 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-15 20:24:14,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:14,939 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-15 20:24:14,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:14,939 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-15 20:24:14,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:14,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:14,940 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:15,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:15,140 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:15,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:15,141 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-15 20:24:15,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:15,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512148670] [2020-10-15 20:24:15,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:15,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512148670] [2020-10-15 20:24:15,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047585230] [2020-10-15 20:24:15,377 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 [2020-10-15 20:24:15,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:24:15,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:15,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:15,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:15,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:15,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:24:15,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763396037] [2020-10-15 20:24:15,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:24:15,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:15,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:24:15,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:24:15,452 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-15 20:24:16,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:16,347 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-15 20:24:16,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:24:16,348 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:24:16,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:16,348 INFO L225 Difference]: With dead ends: 121 [2020-10-15 20:24:16,348 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 20:24:16,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:24:16,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 20:24:16,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-15 20:24:16,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:24:16,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:24:16,350 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-15 20:24:16,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:16,350 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:24:16,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:24:16,350 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:24:16,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:16,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:16,351 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:16,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-15 20:24:16,551 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:16,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:16,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-15 20:24:16,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:16,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907107227] [2020-10-15 20:24:16,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:16,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907107227] [2020-10-15 20:24:16,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931488504] [2020-10-15 20:24:16,790 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 [2020-10-15 20:24:16,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:16,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:16,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:16,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:16,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:16,894 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:16,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:16,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:24:16,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919528109] [2020-10-15 20:24:16,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:16,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:16,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:16,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:16,895 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-15 20:24:18,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:18,036 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-15 20:24:18,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:24:18,037 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:24:18,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:18,037 INFO L225 Difference]: With dead ends: 118 [2020-10-15 20:24:18,038 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 20:24:18,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:24:18,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 20:24:18,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-15 20:24:18,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:24:18,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:24:18,042 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-15 20:24:18,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:18,042 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:24:18,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:18,042 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:24:18,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:18,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:18,042 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:18,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:18,243 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:18,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:18,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-15 20:24:18,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:18,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218764757] [2020-10-15 20:24:18,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:18,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218764757] [2020-10-15 20:24:18,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552189317] [2020-10-15 20:24:18,470 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 [2020-10-15 20:24:18,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:24:18,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:18,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:18,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:18,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:18,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:24:18,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509333217] [2020-10-15 20:24:18,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:24:18,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:18,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:24:18,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:24:18,544 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-15 20:24:19,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:19,491 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-15 20:24:19,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:24:19,492 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:24:19,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:19,492 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:24:19,493 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:24:19,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:24:19,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:24:19,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-15 20:24:19,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 20:24:19,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-15 20:24:19,496 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-15 20:24:19,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:19,496 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-15 20:24:19,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:24:19,496 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-15 20:24:19,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:19,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:19,497 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:19,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:19,706 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:19,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:19,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-15 20:24:19,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:19,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052964174] [2020-10-15 20:24:19,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:19,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052964174] [2020-10-15 20:24:19,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402319420] [2020-10-15 20:24:19,935 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 [2020-10-15 20:24:19,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:24:19,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:19,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:19,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:20,020 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:20,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:20,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:24:20,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589224734] [2020-10-15 20:24:20,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:20,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:20,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:20,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:20,036 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-15 20:24:21,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:21,205 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-15 20:24:21,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:24:21,206 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:24:21,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:21,206 INFO L225 Difference]: With dead ends: 116 [2020-10-15 20:24:21,206 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 20:24:21,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:24:21,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 20:24:21,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-15 20:24:21,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:24:21,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-15 20:24:21,208 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-15 20:24:21,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:21,208 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-15 20:24:21,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:21,208 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-15 20:24:21,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:21,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:21,209 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:21,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:21,410 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:21,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:21,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-15 20:24:21,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:21,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569747440] [2020-10-15 20:24:21,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:21,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569747440] [2020-10-15 20:24:21,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605813486] [2020-10-15 20:24:21,641 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 [2020-10-15 20:24:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:21,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:21,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:21,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:21,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:24:21,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464280384] [2020-10-15 20:24:21,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:24:21,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:21,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:24:21,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:24:21,711 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-15 20:24:22,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:22,719 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-15 20:24:22,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:24:22,720 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:24:22,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:22,721 INFO L225 Difference]: With dead ends: 136 [2020-10-15 20:24:22,721 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 20:24:22,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:24:22,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 20:24:22,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-15 20:24:22,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 20:24:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-15 20:24:22,725 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-15 20:24:22,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:22,725 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-15 20:24:22,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:24:22,725 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-15 20:24:22,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:24:22,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:22,726 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:22,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:22,935 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:22,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:22,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-15 20:24:22,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:22,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391802388] [2020-10-15 20:24:22,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:23,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391802388] [2020-10-15 20:24:23,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676183278] [2020-10-15 20:24:23,168 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 [2020-10-15 20:24:23,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:23,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:23,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:24:23,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:23,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:23,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:23,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:24:23,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404394451] [2020-10-15 20:24:23,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:23,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:23,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:23,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:23,259 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-15 20:24:24,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:24,490 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-15 20:24:24,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:24:24,491 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:24:24,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:24,491 INFO L225 Difference]: With dead ends: 117 [2020-10-15 20:24:24,491 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 20:24:24,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:24:24,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 20:24:24,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-15 20:24:24,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 20:24:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-15 20:24:24,494 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-15 20:24:24,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:24,495 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-15 20:24:24,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:24,495 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-15 20:24:24,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:24,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:24,495 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:24,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:24,696 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:24,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:24,696 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-15 20:24:24,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:24,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325581830] [2020-10-15 20:24:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:25,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325581830] [2020-10-15 20:24:25,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428550403] [2020-10-15 20:24:25,030 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 [2020-10-15 20:24:25,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:24:25,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:25,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:25,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:25,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:25,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:25,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754408625] [2020-10-15 20:24:25,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:25,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:25,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:25,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:25,095 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-15 20:24:25,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:25,656 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-15 20:24:25,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:24:25,657 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:25,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:25,657 INFO L225 Difference]: With dead ends: 134 [2020-10-15 20:24:25,658 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 20:24:25,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:24:25,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 20:24:25,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-15 20:24:25,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:25,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:25,660 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:25,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:25,661 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:25,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:25,661 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:25,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:25,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:25,661 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:25,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-15 20:24:25,862 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:25,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:25,862 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-15 20:24:25,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:25,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957494321] [2020-10-15 20:24:25,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:26,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957494321] [2020-10-15 20:24:26,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116233991] [2020-10-15 20:24:26,200 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 [2020-10-15 20:24:26,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:26,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:26,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:26,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:26,271 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:26,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:26,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:26,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726286537] [2020-10-15 20:24:26,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:26,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:26,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:26,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:26,285 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:26,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:26,948 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-15 20:24:26,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:24:26,948 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:26,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:26,949 INFO L225 Difference]: With dead ends: 131 [2020-10-15 20:24:26,949 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 20:24:26,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:24:26,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 20:24:26,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-15 20:24:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:26,951 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:26,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:26,951 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:26,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:26,952 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:26,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:26,952 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:27,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-15 20:24:27,153 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:27,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:27,153 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-15 20:24:27,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:27,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920393640] [2020-10-15 20:24:27,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:27,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920393640] [2020-10-15 20:24:27,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187904599] [2020-10-15 20:24:27,464 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 [2020-10-15 20:24:27,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:24:27,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:27,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:27,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:27,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:27,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:27,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622497623] [2020-10-15 20:24:27,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:27,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:27,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:27,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:27,531 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:28,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:28,181 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-15 20:24:28,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:24:28,182 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:28,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:28,182 INFO L225 Difference]: With dead ends: 128 [2020-10-15 20:24:28,182 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 20:24:28,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:24:28,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 20:24:28,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-15 20:24:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:28,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:28,185 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:28,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:28,185 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:28,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:28,185 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:28,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:28,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:28,185 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:28,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:28,386 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:28,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:28,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-15 20:24:28,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:28,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041213833] [2020-10-15 20:24:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:28,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041213833] [2020-10-15 20:24:28,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662528336] [2020-10-15 20:24:28,708 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 [2020-10-15 20:24:28,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:24:28,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:28,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:28,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:28,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:28,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:28,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:28,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720629750] [2020-10-15 20:24:28,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:28,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:28,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:28,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:28,803 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:29,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:29,562 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-15 20:24:29,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:24:29,562 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:29,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:29,563 INFO L225 Difference]: With dead ends: 127 [2020-10-15 20:24:29,563 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 20:24:29,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 20:24:29,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 20:24:29,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-15 20:24:29,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:29,565 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:29,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:29,566 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:29,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:29,566 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:29,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:29,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:29,566 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:29,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-15 20:24:29,767 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:29,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:29,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-15 20:24:29,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:29,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010193888] [2020-10-15 20:24:29,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:30,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010193888] [2020-10-15 20:24:30,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212771333] [2020-10-15 20:24:30,054 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 [2020-10-15 20:24:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:30,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:30,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:30,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:30,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:30,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54214379] [2020-10-15 20:24:30,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:30,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:30,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:30,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:30,118 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:30,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:30,808 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-15 20:24:30,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:24:30,808 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:30,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:30,809 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:24:30,809 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 20:24:30,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:24:30,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 20:24:30,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-15 20:24:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:30,811 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:30,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:30,811 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:30,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:30,812 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:30,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:30,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:30,812 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:31,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:31,013 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:31,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:31,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-15 20:24:31,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:31,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438893265] [2020-10-15 20:24:31,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:31,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438893265] [2020-10-15 20:24:31,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793070896] [2020-10-15 20:24:31,314 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 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 [2020-10-15 20:24:31,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:31,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:31,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:31,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:31,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:31,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:31,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:31,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034695337] [2020-10-15 20:24:31,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:31,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:31,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:31,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:31,403 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:32,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:32,271 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-15 20:24:32,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:24:32,272 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:32,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:32,272 INFO L225 Difference]: With dead ends: 123 [2020-10-15 20:24:32,272 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 20:24:32,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:24:32,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 20:24:32,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-15 20:24:32,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:32,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:32,275 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:32,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:32,275 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:32,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:32,276 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:32,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:32,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:32,276 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:32,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:32,477 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:32,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:32,477 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-15 20:24:32,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:32,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120827868] [2020-10-15 20:24:32,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:32,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120827868] [2020-10-15 20:24:32,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376651516] [2020-10-15 20:24:32,764 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 [2020-10-15 20:24:32,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:24:32,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:32,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:32,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:32,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:32,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:32,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315471839] [2020-10-15 20:24:32,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:32,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:32,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:32,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:32,841 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:33,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:33,600 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-15 20:24:33,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:24:33,601 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:33,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:33,602 INFO L225 Difference]: With dead ends: 120 [2020-10-15 20:24:33,602 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 20:24:33,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:24:33,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 20:24:33,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-15 20:24:33,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:33,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:33,604 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:33,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:33,605 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:33,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:33,605 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:33,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:33,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:33,605 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:33,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:33,806 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:33,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:33,806 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-15 20:24:33,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:33,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174366734] [2020-10-15 20:24:33,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:34,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174366734] [2020-10-15 20:24:34,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769485578] [2020-10-15 20:24:34,096 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 [2020-10-15 20:24:34,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:34,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:34,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:34,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:34,170 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:34,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:34,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:34,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47863477] [2020-10-15 20:24:34,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:34,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:34,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:34,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:34,187 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:35,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:35,157 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-15 20:24:35,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:24:35,157 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:35,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:35,158 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:24:35,158 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:24:35,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:24:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:24:35,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-15 20:24:35,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:35,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:35,161 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:35,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:35,161 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:35,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:35,161 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:35,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:35,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:35,162 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:35,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:35,364 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:35,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:35,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-15 20:24:35,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:35,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326841607] [2020-10-15 20:24:35,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:35,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326841607] [2020-10-15 20:24:35,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729909859] [2020-10-15 20:24:35,641 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 [2020-10-15 20:24:35,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:24:35,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:35,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:35,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:35,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:35,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:35,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685916057] [2020-10-15 20:24:35,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:35,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:35,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:35,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:35,711 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:36,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:36,555 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-15 20:24:36,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:24:36,556 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:36,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:36,556 INFO L225 Difference]: With dead ends: 116 [2020-10-15 20:24:36,557 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 20:24:36,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:24:36,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 20:24:36,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-15 20:24:36,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:36,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:36,559 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:36,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:36,559 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:36,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:36,559 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:36,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:36,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:36,559 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:36,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-15 20:24:36,760 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:36,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:36,761 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-15 20:24:36,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:36,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228105530] [2020-10-15 20:24:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:37,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228105530] [2020-10-15 20:24:37,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521367488] [2020-10-15 20:24:37,044 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 [2020-10-15 20:24:37,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:24:37,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:37,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:37,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:37,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:37,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:37,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:37,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249322275] [2020-10-15 20:24:37,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:37,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:37,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:37,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:37,140 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:38,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:38,194 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-15 20:24:38,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:24:38,195 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:38,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:38,196 INFO L225 Difference]: With dead ends: 115 [2020-10-15 20:24:38,196 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 20:24:38,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:24:38,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 20:24:38,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-15 20:24:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:38,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:38,200 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:38,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:38,200 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:38,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:38,200 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:38,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:38,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:38,201 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:38,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:38,408 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:38,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:38,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-15 20:24:38,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:38,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780080563] [2020-10-15 20:24:38,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:38,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780080563] [2020-10-15 20:24:38,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884747027] [2020-10-15 20:24:38,681 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 [2020-10-15 20:24:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:38,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:38,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:38,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:38,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:38,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327960365] [2020-10-15 20:24:38,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:38,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:38,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:38,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:38,748 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:39,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:39,657 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-15 20:24:39,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:24:39,658 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:39,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:39,659 INFO L225 Difference]: With dead ends: 112 [2020-10-15 20:24:39,659 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 20:24:39,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:24:39,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 20:24:39,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-15 20:24:39,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:39,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:39,662 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:39,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:39,662 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:39,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:39,662 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:39,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:39,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:39,663 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:39,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-15 20:24:39,863 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:39,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:39,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-15 20:24:39,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:39,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084995038] [2020-10-15 20:24:39,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:40,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084995038] [2020-10-15 20:24:40,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266539206] [2020-10-15 20:24:40,144 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 [2020-10-15 20:24:40,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:40,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:40,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:40,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:40,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:40,238 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:40,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:40,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:40,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486986371] [2020-10-15 20:24:40,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:40,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:40,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:40,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:40,240 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:41,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:41,406 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-15 20:24:41,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:24:41,407 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:41,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:41,408 INFO L225 Difference]: With dead ends: 111 [2020-10-15 20:24:41,408 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 20:24:41,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:24:41,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 20:24:41,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-15 20:24:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:41,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:41,410 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:41,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:41,411 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:41,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:41,411 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:41,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:41,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:41,411 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:41,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-15 20:24:41,615 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:41,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:41,615 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-15 20:24:41,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:41,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391782845] [2020-10-15 20:24:41,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:41,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391782845] [2020-10-15 20:24:41,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022725913] [2020-10-15 20:24:41,875 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 [2020-10-15 20:24:41,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:24:41,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:41,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:41,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:41,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:41,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:41,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147229937] [2020-10-15 20:24:41,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:41,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:41,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:41,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:41,960 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:42,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:42,931 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-15 20:24:42,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:24:42,932 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:42,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:42,932 INFO L225 Difference]: With dead ends: 108 [2020-10-15 20:24:42,933 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 20:24:42,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:24:42,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 20:24:42,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-15 20:24:42,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:42,935 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:42,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:42,935 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:42,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:42,936 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:42,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:42,936 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:43,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:43,137 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:43,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:43,138 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-15 20:24:43,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:43,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783471554] [2020-10-15 20:24:43,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:43,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783471554] [2020-10-15 20:24:43,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683052366] [2020-10-15 20:24:43,403 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 [2020-10-15 20:24:43,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:43,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:43,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:43,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:43,482 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:43,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:43,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:43,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319746533] [2020-10-15 20:24:43,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:43,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:43,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:43,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:43,500 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:44,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:44,782 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-15 20:24:44,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:24:44,783 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:44,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:44,784 INFO L225 Difference]: With dead ends: 107 [2020-10-15 20:24:44,784 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:24:44,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:24:44,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:24:44,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-15 20:24:44,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:44,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:44,787 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:44,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:44,787 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:44,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:44,787 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:44,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:44,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:44,788 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:44,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:44,992 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:44,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:44,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-15 20:24:44,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:44,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744847024] [2020-10-15 20:24:44,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:45,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744847024] [2020-10-15 20:24:45,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075811134] [2020-10-15 20:24:45,254 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 [2020-10-15 20:24:45,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:24:45,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:45,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:45,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:45,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:45,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:45,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026388772] [2020-10-15 20:24:45,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:45,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:45,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:45,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:45,331 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:46,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:46,409 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-15 20:24:46,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:24:46,410 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:46,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:46,410 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:24:46,410 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:24:46,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:24:46,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:24:46,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-15 20:24:46,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:46,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:46,413 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:46,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:46,413 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:46,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:46,413 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:46,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:46,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:46,413 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:46,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:46,614 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:46,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:46,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-15 20:24:46,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:46,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937008491] [2020-10-15 20:24:46,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:46,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937008491] [2020-10-15 20:24:46,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751417183] [2020-10-15 20:24:46,883 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 [2020-10-15 20:24:46,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:24:46,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:46,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:46,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:46,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:46,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:46,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:46,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792445325] [2020-10-15 20:24:46,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:46,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:46,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:46,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:46,989 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:48,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:48,368 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-15 20:24:48,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:24:48,369 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:48,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:48,369 INFO L225 Difference]: With dead ends: 103 [2020-10-15 20:24:48,369 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 20:24:48,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:24:48,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 20:24:48,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-15 20:24:48,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:48,372 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:48,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:48,372 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:48,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:48,372 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:48,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:48,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:48,373 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:48,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-15 20:24:48,580 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:48,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:48,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-15 20:24:48,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:48,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346378200] [2020-10-15 20:24:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:48,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346378200] [2020-10-15 20:24:48,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788616107] [2020-10-15 20:24:48,842 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 [2020-10-15 20:24:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:48,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:48,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:48,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:48,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:48,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676524438] [2020-10-15 20:24:48,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:48,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:48,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:48,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:48,918 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:50,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:50,046 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-15 20:24:50,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:24:50,047 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:50,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:50,047 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:24:50,048 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:24:50,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:24:50,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:24:50,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-15 20:24:50,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 20:24:50,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-15 20:24:50,050 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-15 20:24:50,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:50,051 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-15 20:24:50,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:50,051 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-15 20:24:50,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:50,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:50,052 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:50,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:50,252 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:50,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:50,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-15 20:24:50,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:50,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557432864] [2020-10-15 20:24:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:50,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557432864] [2020-10-15 20:24:50,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109866183] [2020-10-15 20:24:50,512 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 [2020-10-15 20:24:50,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:50,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:50,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:50,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:50,587 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:50,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:50,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:50,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614244864] [2020-10-15 20:24:50,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:50,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:50,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:50,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:50,608 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-15 20:24:52,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:52,051 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-15 20:24:52,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:24:52,051 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:52,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:52,052 INFO L225 Difference]: With dead ends: 100 [2020-10-15 20:24:52,052 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 20:24:52,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:24:52,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 20:24:52,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-15 20:24:52,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 20:24:52,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-15 20:24:52,054 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-15 20:24:52,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:52,054 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-15 20:24:52,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:52,054 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-15 20:24:52,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:52,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:52,055 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:52,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:52,255 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:52,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:52,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-15 20:24:52,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:52,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332480118] [2020-10-15 20:24:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:52,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332480118] [2020-10-15 20:24:52,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230322310] [2020-10-15 20:24:52,515 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 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 [2020-10-15 20:24:52,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:24:52,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:52,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:52,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:52,599 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:24:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:52,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:52,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:52,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463820248] [2020-10-15 20:24:52,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:52,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:52,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:52,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:52,624 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-15 20:24:53,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:53,954 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-15 20:24:53,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:24:53,955 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:53,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:53,956 INFO L225 Difference]: With dead ends: 116 [2020-10-15 20:24:53,956 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 20:24:53,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:24:53,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 20:24:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-15 20:24:53,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 20:24:53,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-15 20:24:53,958 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-15 20:24:53,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:53,958 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-15 20:24:53,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:53,958 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-15 20:24:53,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:53,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:53,959 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:54,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:54,159 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:54,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:54,160 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-15 20:24:54,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:54,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288096936] [2020-10-15 20:24:54,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:54,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288096936] [2020-10-15 20:24:54,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947382418] [2020-10-15 20:24:54,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:24:54,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:54,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:54,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:54,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:54,521 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:24:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:54,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:54,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:54,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838910458] [2020-10-15 20:24:54,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:54,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:54,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:54,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:54,547 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-15 20:24:56,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:56,010 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-15 20:24:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:24:56,011 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:56,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:56,012 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:24:56,012 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 20:24:56,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:24:56,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 20:24:56,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-15 20:24:56,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:24:56,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-15 20:24:56,014 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-15 20:24:56,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:56,015 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-15 20:24:56,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:56,015 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-15 20:24:56,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:56,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:56,015 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:56,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:56,222 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:56,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:56,223 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-15 20:24:56,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:56,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346163774] [2020-10-15 20:24:56,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:56,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346163774] [2020-10-15 20:24:56,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489013140] [2020-10-15 20:24:56,593 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 [2020-10-15 20:24:56,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:24:56,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:56,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:56,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:56,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:56,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:56,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356534979] [2020-10-15 20:24:56,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:56,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:56,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:56,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:56,658 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-15 20:24:57,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:57,229 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-15 20:24:57,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:24:57,230 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:57,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:57,231 INFO L225 Difference]: With dead ends: 102 [2020-10-15 20:24:57,231 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 20:24:57,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:24:57,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 20:24:57,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-15 20:24:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:24:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-15 20:24:57,233 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-15 20:24:57,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:57,234 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-15 20:24:57,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:57,234 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-15 20:24:57,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:57,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:57,234 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:57,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-15 20:24:57,435 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:57,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:57,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-15 20:24:57,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:57,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114023689] [2020-10-15 20:24:57,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:57,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114023689] [2020-10-15 20:24:57,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700578503] [2020-10-15 20:24:57,811 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 [2020-10-15 20:24:57,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:24:57,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:57,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:57,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:57,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:57,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:57,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:57,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173093468] [2020-10-15 20:24:57,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:57,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:57,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:57,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:57,906 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-15 20:24:58,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:58,542 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-15 20:24:58,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:24:58,543 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:58,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:58,543 INFO L225 Difference]: With dead ends: 122 [2020-10-15 20:24:58,543 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 20:24:58,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:24:58,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 20:24:58,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-15 20:24:58,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 20:24:58,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-15 20:24:58,546 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-15 20:24:58,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:58,546 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-15 20:24:58,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:58,546 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-15 20:24:58,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:58,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:58,546 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:58,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-15 20:24:58,747 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:58,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:58,748 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-15 20:24:58,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:58,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342228174] [2020-10-15 20:24:58,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:59,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342228174] [2020-10-15 20:24:59,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130394331] [2020-10-15 20:24:59,110 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 [2020-10-15 20:24:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:59,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:59,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:59,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:59,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:59,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710446556] [2020-10-15 20:24:59,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:59,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:59,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:59,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:59,172 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-15 20:24:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:59,886 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-15 20:24:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:24:59,887 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:59,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:59,888 INFO L225 Difference]: With dead ends: 123 [2020-10-15 20:24:59,888 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 20:24:59,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:24:59,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 20:24:59,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-15 20:24:59,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:24:59,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-15 20:24:59,891 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-15 20:24:59,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:59,891 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-15 20:24:59,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:59,892 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-15 20:24:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:59,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:59,892 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:00,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-15 20:25:00,093 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:00,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:00,093 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-15 20:25:00,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:00,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818053064] [2020-10-15 20:25:00,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:00,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818053064] [2020-10-15 20:25:00,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033714755] [2020-10-15 20:25:00,466 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 [2020-10-15 20:25:00,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:25:00,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:00,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:00,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:00,549 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:00,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:00,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:25:00,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610457190] [2020-10-15 20:25:00,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:00,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:00,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:00,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:00,563 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-15 20:25:01,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:01,275 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-15 20:25:01,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:25:01,276 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:25:01,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:01,276 INFO L225 Difference]: With dead ends: 139 [2020-10-15 20:25:01,276 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 20:25:01,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:25:01,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 20:25:01,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-15 20:25:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:25:01,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-15 20:25:01,279 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-15 20:25:01,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:01,279 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-15 20:25:01,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:01,279 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-15 20:25:01,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:01,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:01,280 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:01,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-15 20:25:01,485 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:01,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:01,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-15 20:25:01,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:01,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423136532] [2020-10-15 20:25:01,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:01,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423136532] [2020-10-15 20:25:01,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621150281] [2020-10-15 20:25:01,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:25:01,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:25:01,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:01,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:01,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:01,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:01,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:25:01,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297298608] [2020-10-15 20:25:01,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:25:01,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:01,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:25:01,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:25:01,910 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-15 20:25:02,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:02,710 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-15 20:25:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:25:02,711 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:25:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:02,711 INFO L225 Difference]: With dead ends: 139 [2020-10-15 20:25:02,711 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 20:25:02,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:25:02,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 20:25:02,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-15 20:25:02,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 20:25:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-15 20:25:02,713 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-15 20:25:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:02,713 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-15 20:25:02,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:25:02,714 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-15 20:25:02,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:02,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:02,714 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:02,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:02,915 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:02,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:02,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-15 20:25:02,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:02,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634446034] [2020-10-15 20:25:02,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:03,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634446034] [2020-10-15 20:25:03,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389492546] [2020-10-15 20:25:03,267 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 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 [2020-10-15 20:25:03,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:25:03,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:03,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:03,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:03,344 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:03,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:03,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:25:03,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104168470] [2020-10-15 20:25:03,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:03,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:03,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:03,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:03,359 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-15 20:25:04,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:04,219 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-15 20:25:04,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:25:04,220 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:25:04,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:04,220 INFO L225 Difference]: With dead ends: 136 [2020-10-15 20:25:04,220 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 20:25:04,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:25:04,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 20:25:04,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-15 20:25:04,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:25:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-15 20:25:04,222 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-15 20:25:04,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:04,222 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-15 20:25:04,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:04,222 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-15 20:25:04,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:04,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:04,223 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:04,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-15 20:25:04,424 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:04,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-15 20:25:04,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:04,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208402357] [2020-10-15 20:25:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:04,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208402357] [2020-10-15 20:25:04,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525620991] [2020-10-15 20:25:04,755 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 [2020-10-15 20:25:04,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:25:04,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:04,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:04,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:04,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:04,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:25:04,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114472812] [2020-10-15 20:25:04,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:25:04,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:04,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:25:04,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:25:04,825 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-15 20:25:05,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:05,682 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-15 20:25:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:25:05,683 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:25:05,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:05,683 INFO L225 Difference]: With dead ends: 137 [2020-10-15 20:25:05,683 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 20:25:05,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:25:05,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 20:25:05,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-15 20:25:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 20:25:05,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-15 20:25:05,687 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-15 20:25:05,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:05,687 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-15 20:25:05,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:25:05,687 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-15 20:25:05,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:05,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:05,687 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:05,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:05,888 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:05,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:05,888 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-15 20:25:05,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:05,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372218778] [2020-10-15 20:25:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:05,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:06,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372218778] [2020-10-15 20:25:06,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460624346] [2020-10-15 20:25:06,220 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 [2020-10-15 20:25:06,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:25:06,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:06,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:06,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:06,302 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:06,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:06,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:25:06,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379219719] [2020-10-15 20:25:06,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:06,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:06,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:06,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:06,319 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-15 20:25:07,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:07,283 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-15 20:25:07,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:25:07,284 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:25:07,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:07,284 INFO L225 Difference]: With dead ends: 134 [2020-10-15 20:25:07,285 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 20:25:07,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:25:07,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 20:25:07,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-15 20:25:07,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 20:25:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-15 20:25:07,287 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-15 20:25:07,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:07,287 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-15 20:25:07,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:07,287 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-15 20:25:07,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:07,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:07,288 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:07,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-15 20:25:07,491 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:07,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:07,492 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-15 20:25:07,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:07,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037655635] [2020-10-15 20:25:07,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:07,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037655635] [2020-10-15 20:25:07,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144468953] [2020-10-15 20:25:07,807 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 [2020-10-15 20:25:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:07,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:07,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:07,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:07,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:25:07,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074237639] [2020-10-15 20:25:07,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:25:07,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:07,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:25:07,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:25:07,882 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-15 20:25:08,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:08,797 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-15 20:25:08,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:25:08,798 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:25:08,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:08,798 INFO L225 Difference]: With dead ends: 135 [2020-10-15 20:25:08,798 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 20:25:08,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:25:08,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 20:25:08,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-15 20:25:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:25:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-15 20:25:08,800 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-15 20:25:08,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:08,801 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-15 20:25:08,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:25:08,801 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-15 20:25:08,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:08,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:08,801 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:09,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:09,002 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:09,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:09,003 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-15 20:25:09,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:09,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652571171] [2020-10-15 20:25:09,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:09,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652571171] [2020-10-15 20:25:09,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042358660] [2020-10-15 20:25:09,327 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 [2020-10-15 20:25:09,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:25:09,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:09,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:09,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:09,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:09,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:09,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:25:09,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827533011] [2020-10-15 20:25:09,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:09,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:09,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:09,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:09,429 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-15 20:25:10,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:10,492 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-15 20:25:10,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:25:10,493 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:25:10,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:10,493 INFO L225 Difference]: With dead ends: 132 [2020-10-15 20:25:10,493 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 20:25:10,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:25:10,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 20:25:10,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-15 20:25:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:25:10,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-15 20:25:10,495 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-15 20:25:10,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:10,495 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-15 20:25:10,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-15 20:25:10,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:10,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:10,495 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:10,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:10,696 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:10,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:10,697 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-15 20:25:10,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:10,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341828882] [2020-10-15 20:25:10,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:11,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341828882] [2020-10-15 20:25:11,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878368261] [2020-10-15 20:25:11,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:25:11,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:25:11,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:11,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:11,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:11,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:11,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:25:11,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286870672] [2020-10-15 20:25:11,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:25:11,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:11,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:25:11,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:25:11,089 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-15 20:25:12,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:12,070 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-15 20:25:12,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:25:12,071 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:25:12,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:12,071 INFO L225 Difference]: With dead ends: 133 [2020-10-15 20:25:12,071 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 20:25:12,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:25:12,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 20:25:12,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-15 20:25:12,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 20:25:12,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-15 20:25:12,074 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-15 20:25:12,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:12,074 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-15 20:25:12,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:25:12,074 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-15 20:25:12,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:12,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:12,074 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:12,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:12,275 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:12,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:12,276 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-15 20:25:12,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:12,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028825868] [2020-10-15 20:25:12,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:12,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028825868] [2020-10-15 20:25:12,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919478583] [2020-10-15 20:25:12,597 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 [2020-10-15 20:25:12,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:25:12,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:12,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:12,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:12,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:12,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:12,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:25:12,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394947230] [2020-10-15 20:25:12,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:12,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:12,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:12,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:12,694 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-15 20:25:13,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:13,863 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-15 20:25:13,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:25:13,864 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:25:13,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:13,864 INFO L225 Difference]: With dead ends: 130 [2020-10-15 20:25:13,864 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 20:25:13,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:25:13,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 20:25:13,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-15 20:25:13,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:25:13,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-15 20:25:13,866 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-15 20:25:13,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:13,866 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-15 20:25:13,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:13,866 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-15 20:25:13,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:13,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:13,867 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:14,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:14,068 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:14,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:14,068 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-15 20:25:14,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:14,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215260827] [2020-10-15 20:25:14,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:14,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215260827] [2020-10-15 20:25:14,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908395608] [2020-10-15 20:25:14,365 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 [2020-10-15 20:25:14,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:25:14,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:14,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:14,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:14,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:14,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:25:14,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127438528] [2020-10-15 20:25:14,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:25:14,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:14,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:25:14,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:25:14,449 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-15 20:25:15,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:15,521 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-15 20:25:15,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:25:15,522 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:25:15,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:15,523 INFO L225 Difference]: With dead ends: 131 [2020-10-15 20:25:15,523 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 20:25:15,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:25:15,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 20:25:15,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-15 20:25:15,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 20:25:15,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-15 20:25:15,525 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-15 20:25:15,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:15,526 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-15 20:25:15,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:25:15,526 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-15 20:25:15,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:15,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:15,526 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:15,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-15 20:25:15,727 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:15,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:15,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-15 20:25:15,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:15,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659852024] [2020-10-15 20:25:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:16,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659852024] [2020-10-15 20:25:16,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543088051] [2020-10-15 20:25:16,034 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 [2020-10-15 20:25:16,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:25:16,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:16,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:16,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:16,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:16,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:16,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:25:16,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547317540] [2020-10-15 20:25:16,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:16,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:16,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:16,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:16,136 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-15 20:25:17,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:17,411 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-15 20:25:17,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:25:17,412 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:25:17,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:17,412 INFO L225 Difference]: With dead ends: 128 [2020-10-15 20:25:17,412 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 20:25:17,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:25:17,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 20:25:17,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-15 20:25:17,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 20:25:17,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-15 20:25:17,415 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-15 20:25:17,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:17,415 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-15 20:25:17,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:17,415 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-15 20:25:17,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:17,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:17,415 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:17,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-15 20:25:17,616 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:17,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:17,617 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-15 20:25:17,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:17,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397306822] [2020-10-15 20:25:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:17,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397306822] [2020-10-15 20:25:17,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182666706] [2020-10-15 20:25:17,915 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 [2020-10-15 20:25:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:17,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:17,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:17,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:17,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:25:17,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944689687] [2020-10-15 20:25:17,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:25:17,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:17,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:25:17,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:25:17,992 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-15 20:25:19,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:19,117 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-15 20:25:19,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:25:19,117 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:25:19,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:19,118 INFO L225 Difference]: With dead ends: 129 [2020-10-15 20:25:19,118 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 20:25:19,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:25:19,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 20:25:19,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-15 20:25:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:25:19,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:25:19,120 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-15 20:25:19,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:19,120 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:25:19,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:25:19,120 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:25:19,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:19,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:19,120 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:19,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-15 20:25:19,321 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:19,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:19,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-15 20:25:19,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:19,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390364778] [2020-10-15 20:25:19,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:19,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390364778] [2020-10-15 20:25:19,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898383491] [2020-10-15 20:25:19,626 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 [2020-10-15 20:25:19,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:25:19,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:19,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:19,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:19,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:19,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:19,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:25:19,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527278968] [2020-10-15 20:25:19,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:19,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:19,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:19,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:19,730 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-15 20:25:21,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:21,116 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-15 20:25:21,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:25:21,117 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:25:21,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:21,117 INFO L225 Difference]: With dead ends: 126 [2020-10-15 20:25:21,117 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 20:25:21,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 20:25:21,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 20:25:21,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-15 20:25:21,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:25:21,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:25:21,120 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-15 20:25:21,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:21,120 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:25:21,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:21,120 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:25:21,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:21,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:21,120 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:21,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-15 20:25:21,327 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:21,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:21,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-15 20:25:21,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:21,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786340853] [2020-10-15 20:25:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:21,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786340853] [2020-10-15 20:25:21,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758608054] [2020-10-15 20:25:21,624 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 [2020-10-15 20:25:21,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:25:21,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:21,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:21,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:21,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:21,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:25:21,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693477083] [2020-10-15 20:25:21,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:25:21,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:21,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:25:21,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:25:21,708 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-15 20:25:22,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:22,939 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-15 20:25:22,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 20:25:22,940 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:25:22,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:22,940 INFO L225 Difference]: With dead ends: 127 [2020-10-15 20:25:22,940 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 20:25:22,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:25:22,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 20:25:22,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-15 20:25:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 20:25:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-15 20:25:22,943 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-15 20:25:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:22,943 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-15 20:25:22,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:25:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-15 20:25:22,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:22,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:22,943 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:23,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:23,144 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:23,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:23,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-15 20:25:23,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:23,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207294211] [2020-10-15 20:25:23,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:23,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207294211] [2020-10-15 20:25:23,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91286483] [2020-10-15 20:25:23,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:23,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:25:23,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:23,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:23,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:23,521 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:23,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:23,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:25:23,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431533263] [2020-10-15 20:25:23,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:23,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:23,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:23,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:23,543 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-15 20:25:25,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:25,030 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-15 20:25:25,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:25:25,031 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:25:25,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:25,031 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:25:25,031 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 20:25:25,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:25:25,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 20:25:25,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-15 20:25:25,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 20:25:25,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-15 20:25:25,034 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-15 20:25:25,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:25,034 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-15 20:25:25,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:25,035 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-15 20:25:25,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:25,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:25,035 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:25,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-15 20:25:25,243 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:25,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:25,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-15 20:25:25,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:25,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821389038] [2020-10-15 20:25:25,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:25,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821389038] [2020-10-15 20:25:25,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796129541] [2020-10-15 20:25:25,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:25,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:25:25,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:25,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:25:25,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:25,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:25,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:25:25,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868613683] [2020-10-15 20:25:25,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:25:25,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:25,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:25:25,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:25:25,630 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-15 20:25:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:26,895 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-15 20:25:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:25:26,895 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:25:26,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:26,896 INFO L225 Difference]: With dead ends: 144 [2020-10-15 20:25:26,896 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 20:25:26,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 20:25:26,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 20:25:26,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-15 20:25:26,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 20:25:26,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-15 20:25:26,899 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-15 20:25:26,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:26,899 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-15 20:25:26,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:25:26,899 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-15 20:25:26,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:25:26,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:26,900 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:27,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:27,109 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:27,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:27,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-15 20:25:27,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:27,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819307304] [2020-10-15 20:25:27,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:27,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819307304] [2020-10-15 20:25:27,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933984150] [2020-10-15 20:25:27,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:27,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:25:27,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:27,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:27,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:27,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:27,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:25:27,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501559215] [2020-10-15 20:25:27,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:27,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:27,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:27,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:27,528 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-15 20:25:29,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:29,047 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-15 20:25:29,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:25:29,048 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:25:29,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:29,048 INFO L225 Difference]: With dead ends: 125 [2020-10-15 20:25:29,048 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 20:25:29,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1106, Invalid=2800, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:25:29,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 20:25:29,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-15 20:25:29,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 20:25:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-15 20:25:29,051 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-15 20:25:29,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:29,051 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-15 20:25:29,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:29,051 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-15 20:25:29,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:29,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:29,052 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:29,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-15 20:25:29,252 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:29,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:29,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-15 20:25:29,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:29,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025580225] [2020-10-15 20:25:29,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:29,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025580225] [2020-10-15 20:25:29,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011732344] [2020-10-15 20:25:29,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:29,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:29,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:29,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:29,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:29,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215388364] [2020-10-15 20:25:29,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:29,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:29,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:29,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:29,737 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-10-15 20:25:30,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:30,429 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-10-15 20:25:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:25:30,431 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:30,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:30,431 INFO L225 Difference]: With dead ends: 144 [2020-10-15 20:25:30,431 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 20:25:30,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:25:30,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 20:25:30,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-10-15 20:25:30,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:30,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:30,434 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:30,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:30,434 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:30,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:30,434 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:30,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:30,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:30,435 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:30,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:30,635 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:30,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:30,636 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-10-15 20:25:30,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:30,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182606540] [2020-10-15 20:25:30,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:31,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182606540] [2020-10-15 20:25:31,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082921749] [2020-10-15 20:25:31,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:31,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:25:31,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:31,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:31,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:31,143 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:31,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:31,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:31,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284618716] [2020-10-15 20:25:31,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:31,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:31,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:31,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:31,157 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:31,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:31,934 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-10-15 20:25:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:25:31,935 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:31,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:31,935 INFO L225 Difference]: With dead ends: 141 [2020-10-15 20:25:31,935 INFO L226 Difference]: Without dead ends: 135 [2020-10-15 20:25:31,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:25:31,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-15 20:25:31,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-10-15 20:25:31,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:31,938 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:31,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:31,938 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:31,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:31,938 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:31,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:31,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:31,939 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:32,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-10-15 20:25:32,140 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:32,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:32,140 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-10-15 20:25:32,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:32,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470755905] [2020-10-15 20:25:32,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:32,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470755905] [2020-10-15 20:25:32,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368745034] [2020-10-15 20:25:32,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:32,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:25:32,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:32,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:32,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:32,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:32,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:32,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817363065] [2020-10-15 20:25:32,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:32,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:32,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:32,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:32,612 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:33,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:33,410 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-10-15 20:25:33,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:25:33,411 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:33,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:33,412 INFO L225 Difference]: With dead ends: 138 [2020-10-15 20:25:33,412 INFO L226 Difference]: Without dead ends: 132 [2020-10-15 20:25:33,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:25:33,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-15 20:25:33,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-10-15 20:25:33,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:33,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:33,414 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:33,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:33,415 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:33,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:33,415 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:33,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:33,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:33,415 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:33,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:33,616 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:33,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:33,617 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-10-15 20:25:33,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:33,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720514472] [2020-10-15 20:25:33,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:34,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720514472] [2020-10-15 20:25:34,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214731266] [2020-10-15 20:25:34,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:34,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:25:34,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:34,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:34,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:34,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:34,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:34,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:34,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882673059] [2020-10-15 20:25:34,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:34,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:34,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:34,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:34,107 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:35,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:35,041 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-15 20:25:35,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:25:35,041 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:35,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:35,042 INFO L225 Difference]: With dead ends: 137 [2020-10-15 20:25:35,042 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 20:25:35,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:25:35,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 20:25:35,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-10-15 20:25:35,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:35,044 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:35,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:35,044 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:35,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:35,045 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:35,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:35,045 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:35,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-10-15 20:25:35,246 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:35,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:35,246 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-10-15 20:25:35,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:35,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364645989] [2020-10-15 20:25:35,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:35,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364645989] [2020-10-15 20:25:35,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055366879] [2020-10-15 20:25:35,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:35,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:25:35,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:35,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:35,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:35,709 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:35,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:35,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:35,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386668508] [2020-10-15 20:25:35,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:35,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:35,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:35,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:35,710 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:36,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:36,587 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-15 20:25:36,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:25:36,588 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:36,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:36,589 INFO L225 Difference]: With dead ends: 134 [2020-10-15 20:25:36,589 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 20:25:36,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:25:36,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 20:25:36,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-10-15 20:25:36,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:36,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:36,592 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:36,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:36,592 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:36,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:36,592 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:36,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:36,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:36,593 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:36,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-15 20:25:36,800 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:36,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:36,800 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-10-15 20:25:36,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:36,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351122626] [2020-10-15 20:25:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:37,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351122626] [2020-10-15 20:25:37,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606148004] [2020-10-15 20:25:37,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:37,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:25:37,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:37,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:37,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:37,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:37,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:37,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:37,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665705250] [2020-10-15 20:25:37,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:37,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:37,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:37,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:37,290 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:38,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:38,345 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-15 20:25:38,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:25:38,346 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:38,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:38,347 INFO L225 Difference]: With dead ends: 133 [2020-10-15 20:25:38,347 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 20:25:38,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:25:38,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 20:25:38,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-10-15 20:25:38,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:38,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:38,350 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:38,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:38,350 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:38,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:38,351 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:38,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:38,351 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:38,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-15 20:25:38,555 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:38,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:38,556 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-10-15 20:25:38,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:38,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026254676] [2020-10-15 20:25:38,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:38,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026254676] [2020-10-15 20:25:38,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615073034] [2020-10-15 20:25:38,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:38,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:38,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:38,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:38,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:38,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918873818] [2020-10-15 20:25:38,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:38,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:38,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:38,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:38,993 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:39,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:39,948 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-10-15 20:25:39,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:25:39,949 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:39,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:39,950 INFO L225 Difference]: With dead ends: 130 [2020-10-15 20:25:39,950 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 20:25:39,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:25:39,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 20:25:39,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-10-15 20:25:39,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:39,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:39,953 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:39,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:39,953 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:39,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:39,953 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:39,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:39,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:39,954 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:40,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:40,156 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:40,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:40,156 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-10-15 20:25:40,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:40,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743134958] [2020-10-15 20:25:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:40,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743134958] [2020-10-15 20:25:40,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069532970] [2020-10-15 20:25:40,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:40,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:25:40,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:40,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:40,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:40,606 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:40,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:40,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:40,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334836964] [2020-10-15 20:25:40,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:40,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:40,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:40,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:40,623 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:41,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:41,799 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-10-15 20:25:41,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:25:41,800 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:41,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:41,800 INFO L225 Difference]: With dead ends: 129 [2020-10-15 20:25:41,800 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 20:25:41,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:25:41,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 20:25:41,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-10-15 20:25:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:41,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:41,804 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:41,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:41,804 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:41,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:41,804 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:41,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:41,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:41,805 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:42,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-15 20:25:42,005 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:42,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:42,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-10-15 20:25:42,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:42,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010793163] [2020-10-15 20:25:42,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:42,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010793163] [2020-10-15 20:25:42,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527758717] [2020-10-15 20:25:42,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:42,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:25:42,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:42,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:42,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:42,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:42,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:42,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067456923] [2020-10-15 20:25:42,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:42,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:42,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:42,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:42,444 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:43,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:43,500 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-10-15 20:25:43,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:25:43,501 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:43,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:43,501 INFO L225 Difference]: With dead ends: 126 [2020-10-15 20:25:43,501 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 20:25:43,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:25:43,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 20:25:43,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-10-15 20:25:43,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:43,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:43,504 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:43,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:43,504 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:43,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:43,504 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:43,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:43,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:43,504 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:43,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:43,705 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:43,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:43,705 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-10-15 20:25:43,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:43,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507351388] [2020-10-15 20:25:43,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:44,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507351388] [2020-10-15 20:25:44,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210821902] [2020-10-15 20:25:44,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:44,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:25:44,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:44,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:44,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:44,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:44,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:44,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:44,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411434052] [2020-10-15 20:25:44,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:44,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:44,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:44,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:44,164 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:45,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:45,422 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-10-15 20:25:45,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:25:45,423 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:45,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:45,423 INFO L225 Difference]: With dead ends: 125 [2020-10-15 20:25:45,424 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 20:25:45,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:25:45,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 20:25:45,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-10-15 20:25:45,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:45,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:45,426 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:45,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:45,426 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:45,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:45,426 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:45,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:45,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:45,426 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:45,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-10-15 20:25:45,628 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:45,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:45,629 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-10-15 20:25:45,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:45,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674533356] [2020-10-15 20:25:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:45,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674533356] [2020-10-15 20:25:45,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742463286] [2020-10-15 20:25:45,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:46,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:25:46,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:46,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:46,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:46,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:46,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:46,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031785227] [2020-10-15 20:25:46,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:46,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:46,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:46,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:46,055 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:47,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:47,168 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-10-15 20:25:47,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:25:47,169 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:47,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:47,170 INFO L225 Difference]: With dead ends: 122 [2020-10-15 20:25:47,170 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 20:25:47,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:25:47,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 20:25:47,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-10-15 20:25:47,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:47,173 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:47,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:47,173 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:47,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:47,173 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:47,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:47,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:47,173 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:47,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:47,374 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:47,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:47,374 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-10-15 20:25:47,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:47,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839229766] [2020-10-15 20:25:47,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:47,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839229766] [2020-10-15 20:25:47,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055877965] [2020-10-15 20:25:47,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:47,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:25:47,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:47,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:47,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:47,800 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:47,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:47,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:47,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41561863] [2020-10-15 20:25:47,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:47,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:47,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:47,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:47,819 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:49,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:49,218 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-10-15 20:25:49,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:25:49,219 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:49,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:49,219 INFO L225 Difference]: With dead ends: 121 [2020-10-15 20:25:49,220 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 20:25:49,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:25:49,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 20:25:49,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-10-15 20:25:49,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:49,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:49,222 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:49,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:49,222 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:49,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:49,222 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:49,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:49,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:49,223 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:49,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-10-15 20:25:49,423 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:49,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:49,424 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-10-15 20:25:49,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:49,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855291632] [2020-10-15 20:25:49,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:49,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855291632] [2020-10-15 20:25:49,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432908771] [2020-10-15 20:25:49,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:49,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:49,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:49,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:49,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:49,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905500780] [2020-10-15 20:25:49,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:49,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:49,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:49,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:49,842 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:51,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:51,045 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-10-15 20:25:51,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:25:51,046 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:51,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:51,047 INFO L225 Difference]: With dead ends: 118 [2020-10-15 20:25:51,047 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 20:25:51,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:25:51,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 20:25:51,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-10-15 20:25:51,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:51,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:51,050 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:51,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:51,050 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:51,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:51,050 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:51,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:51,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:51,051 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:51,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:51,251 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:51,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:51,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-10-15 20:25:51,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:51,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873705440] [2020-10-15 20:25:51,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:51,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873705440] [2020-10-15 20:25:51,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674258121] [2020-10-15 20:25:51,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:51,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:25:51,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:51,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:51,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:51,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:51,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:51,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:51,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258127149] [2020-10-15 20:25:51,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:51,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:51,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:51,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:51,704 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:53,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:53,238 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-10-15 20:25:53,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:25:53,239 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:53,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:53,240 INFO L225 Difference]: With dead ends: 117 [2020-10-15 20:25:53,240 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 20:25:53,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:25:53,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 20:25:53,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-10-15 20:25:53,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:53,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:53,243 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:53,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:53,243 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:53,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:53,243 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:53,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:53,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:53,244 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:53,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:53,444 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:53,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-10-15 20:25:53,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:53,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055665469] [2020-10-15 20:25:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:53,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055665469] [2020-10-15 20:25:53,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407792512] [2020-10-15 20:25:53,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:53,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:25:53,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:53,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:53,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:53,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:53,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:53,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27988460] [2020-10-15 20:25:53,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:53,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:53,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:53,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:53,870 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:55,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:55,152 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-10-15 20:25:55,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:25:55,154 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:55,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:55,154 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:25:55,154 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:25:55,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 20:25:55,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:25:55,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-10-15 20:25:55,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:55,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:55,157 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:55,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:55,158 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:55,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:55,158 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:55,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:55,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:55,158 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:55,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-15 20:25:55,359 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:55,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:55,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-10-15 20:25:55,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:55,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75143164] [2020-10-15 20:25:55,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:55,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75143164] [2020-10-15 20:25:55,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715073653] [2020-10-15 20:25:55,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:55,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:25:55,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:55,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:55,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:55,785 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:55,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:55,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:55,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648452481] [2020-10-15 20:25:55,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:55,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:55,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:55,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:55,808 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:57,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:57,460 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-15 20:25:57,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:25:57,461 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:57,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:57,462 INFO L225 Difference]: With dead ends: 113 [2020-10-15 20:25:57,462 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 20:25:57,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 20:25:57,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 20:25:57,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-10-15 20:25:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:57,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:57,464 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:57,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:57,465 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:57,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:57,465 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:57,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:57,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:57,465 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:57,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-15 20:25:57,666 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:57,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:57,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-10-15 20:25:57,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:57,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606118555] [2020-10-15 20:25:57,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:58,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606118555] [2020-10-15 20:25:58,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586118105] [2020-10-15 20:25:58,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:58,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:25:58,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:58,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:58,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:58,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:58,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:58,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840387667] [2020-10-15 20:25:58,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:58,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:58,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:58,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:58,088 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:59,468 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-10-15 20:25:59,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 20:25:59,469 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:59,469 INFO L225 Difference]: With dead ends: 110 [2020-10-15 20:25:59,469 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 20:25:59,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:25:59,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 20:25:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-10-15 20:25:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:59,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:59,472 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:59,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:59,472 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:59,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:59,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:59,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:59,472 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:59,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-15 20:25:59,673 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:59,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:59,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-10-15 20:25:59,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:59,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860101503] [2020-10-15 20:25:59,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:00,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860101503] [2020-10-15 20:26:00,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694408174] [2020-10-15 20:26:00,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:00,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:26:00,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:00,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:26:00,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:00,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:00,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:00,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:26:00,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82584829] [2020-10-15 20:26:00,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:00,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:00,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:00,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:00,133 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:26:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:01,918 INFO L93 Difference]: Finished difference Result 109 states and 269 transitions. [2020-10-15 20:26:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:26:01,920 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:26:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:01,920 INFO L225 Difference]: With dead ends: 109 [2020-10-15 20:26:01,920 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:26:01,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1197, Invalid=2835, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 20:26:01,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:26:01,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-10-15 20:26:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:26:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:26:01,923 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:26:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:01,923 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:26:01,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:01,924 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:26:01,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:26:01,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:01,924 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:02,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-15 20:26:02,125 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:02,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:02,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-10-15 20:26:02,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:02,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866832477] [2020-10-15 20:26:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:02,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866832477] [2020-10-15 20:26:02,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266829415] [2020-10-15 20:26:02,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:02,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:26:02,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:02,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:02,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:26:02,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948070151] [2020-10-15 20:26:02,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:26:02,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:02,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:26:02,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:26:02,544 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:26:04,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:04,018 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-10-15 20:26:04,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:26:04,019 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:26:04,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:04,020 INFO L225 Difference]: With dead ends: 125 [2020-10-15 20:26:04,020 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 20:26:04,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:26:04,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 20:26:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-10-15 20:26:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 20:26:04,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-10-15 20:26:04,022 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-10-15 20:26:04,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:04,022 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-10-15 20:26:04,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:26:04,023 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-10-15 20:26:04,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:26:04,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:04,023 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:04,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-15 20:26:04,224 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:04,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:04,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-10-15 20:26:04,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:04,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028775778] [2020-10-15 20:26:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:04,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028775778] [2020-10-15 20:26:04,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819967739] [2020-10-15 20:26:04,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:04,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:26:04,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:04,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:04,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:04,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:04,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:26:04,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322200288] [2020-10-15 20:26:04,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:04,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:04,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:04,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:04,677 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-10-15 20:26:06,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:06,309 INFO L93 Difference]: Finished difference Result 104 states and 261 transitions. [2020-10-15 20:26:06,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:26:06,310 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:26:06,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:06,311 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:26:06,311 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 20:26:06,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1121, Invalid=2911, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 20:26:06,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 20:26:06,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 69. [2020-10-15 20:26:06,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:26:06,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-10-15 20:26:06,312 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-10-15 20:26:06,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:06,313 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-10-15 20:26:06,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:06,313 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-10-15 20:26:06,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:26:06,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:06,313 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:06,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:06,514 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:06,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:06,515 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-10-15 20:26:06,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:06,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725855179] [2020-10-15 20:26:06,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:06,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725855179] [2020-10-15 20:26:06,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610875998] [2020-10-15 20:26:06,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:06,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:26:06,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:06,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:26:06,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:06,950 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:26:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:06,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:06,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:26:06,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243371928] [2020-10-15 20:26:06,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:06,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:06,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:06,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:06,982 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-10-15 20:26:08,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:08,696 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-10-15 20:26:08,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:26:08,697 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:26:08,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:08,697 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:26:08,697 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 20:26:08,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 20:26:08,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 20:26:08,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-10-15 20:26:08,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 20:26:08,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-10-15 20:26:08,700 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-10-15 20:26:08,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:08,700 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-10-15 20:26:08,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:08,701 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-10-15 20:26:08,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:08,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:08,701 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:08,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-15 20:26:08,902 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:08,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:08,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-10-15 20:26:08,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:08,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582883984] [2020-10-15 20:26:08,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:09,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582883984] [2020-10-15 20:26:09,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205406487] [2020-10-15 20:26:09,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:09,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:26:09,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:09,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:09,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:09,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:26:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:09,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:09,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:09,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485307038] [2020-10-15 20:26:09,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:09,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:09,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:09,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:09,385 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 26 states. [2020-10-15 20:26:11,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:11,212 INFO L93 Difference]: Finished difference Result 102 states and 261 transitions. [2020-10-15 20:26:11,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:26:11,214 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:11,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:11,214 INFO L225 Difference]: With dead ends: 102 [2020-10-15 20:26:11,214 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 20:26:11,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1409, Invalid=3013, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 20:26:11,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 20:26:11,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2020-10-15 20:26:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:26:11,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-10-15 20:26:11,217 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 29 [2020-10-15 20:26:11,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:11,218 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-10-15 20:26:11,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:11,218 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-10-15 20:26:11,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:11,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:11,218 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:11,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:11,427 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:11,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:11,428 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-10-15 20:26:11,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:11,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216597340] [2020-10-15 20:26:11,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:11,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216597340] [2020-10-15 20:26:11,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909170017] [2020-10-15 20:26:11,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:11,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 20:26:11,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:11,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:11,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:11,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:11,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:11,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329909309] [2020-10-15 20:26:11,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:11,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:11,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:11,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:11,999 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 25 states. [2020-10-15 20:26:12,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:12,735 INFO L93 Difference]: Finished difference Result 108 states and 251 transitions. [2020-10-15 20:26:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:26:12,736 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:12,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:12,737 INFO L225 Difference]: With dead ends: 108 [2020-10-15 20:26:12,737 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 20:26:12,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=663, Invalid=1407, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 20:26:12,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 20:26:12,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2020-10-15 20:26:12,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 20:26:12,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-10-15 20:26:12,740 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 29 [2020-10-15 20:26:12,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:12,741 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-10-15 20:26:12,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:12,741 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-10-15 20:26:12,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:12,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:12,741 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:12,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:12,949 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:12,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:12,949 INFO L82 PathProgramCache]: Analyzing trace with hash -972903182, now seen corresponding path program 240 times [2020-10-15 20:26:12,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:12,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704344588] [2020-10-15 20:26:12,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:13,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704344588] [2020-10-15 20:26:13,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349500067] [2020-10-15 20:26:13,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:13,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 20:26:13,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:13,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:13,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:13,534 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:13,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:13,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:13,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029163812] [2020-10-15 20:26:13,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:13,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:13,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:13,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:13,547 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 26 states. [2020-10-15 20:26:14,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:14,349 INFO L93 Difference]: Finished difference Result 130 states and 295 transitions. [2020-10-15 20:26:14,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:26:14,351 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:14,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:14,352 INFO L225 Difference]: With dead ends: 130 [2020-10-15 20:26:14,352 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 20:26:14,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=672, Invalid=1584, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:26:14,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 20:26:14,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 76. [2020-10-15 20:26:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:26:14,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 187 transitions. [2020-10-15 20:26:14,354 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 187 transitions. Word has length 29 [2020-10-15 20:26:14,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:14,354 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 187 transitions. [2020-10-15 20:26:14,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:14,354 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 187 transitions. [2020-10-15 20:26:14,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:14,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:14,355 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:14,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:14,555 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:14,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:14,556 INFO L82 PathProgramCache]: Analyzing trace with hash -558119952, now seen corresponding path program 241 times [2020-10-15 20:26:14,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:14,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447525920] [2020-10-15 20:26:14,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:15,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447525920] [2020-10-15 20:26:15,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818422952] [2020-10-15 20:26:15,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:15,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:15,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:15,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:15,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:15,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210687499] [2020-10-15 20:26:15,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:15,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:15,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:15,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:15,093 INFO L87 Difference]: Start difference. First operand 76 states and 187 transitions. Second operand 25 states. [2020-10-15 20:26:15,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:15,992 INFO L93 Difference]: Finished difference Result 131 states and 299 transitions. [2020-10-15 20:26:15,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:26:15,993 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:15,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:15,994 INFO L225 Difference]: With dead ends: 131 [2020-10-15 20:26:15,994 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 20:26:15,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=674, Invalid=1678, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:26:15,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 20:26:15,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 79. [2020-10-15 20:26:15,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 20:26:15,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 195 transitions. [2020-10-15 20:26:15,997 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 195 transitions. Word has length 29 [2020-10-15 20:26:15,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:16,001 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 195 transitions. [2020-10-15 20:26:16,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:16,001 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 195 transitions. [2020-10-15 20:26:16,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:16,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:16,002 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:16,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:16,202 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:16,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:16,203 INFO L82 PathProgramCache]: Analyzing trace with hash 2015097940, now seen corresponding path program 242 times [2020-10-15 20:26:16,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:16,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210064980] [2020-10-15 20:26:16,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:16,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210064980] [2020-10-15 20:26:16,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866366453] [2020-10-15 20:26:16,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:16,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:26:16,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:16,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:16,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:16,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:16,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:16,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:16,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275062989] [2020-10-15 20:26:16,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:16,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:16,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:16,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:16,781 INFO L87 Difference]: Start difference. First operand 79 states and 195 transitions. Second operand 26 states. [2020-10-15 20:26:17,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:17,728 INFO L93 Difference]: Finished difference Result 149 states and 335 transitions. [2020-10-15 20:26:17,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:26:17,729 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:17,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:17,730 INFO L225 Difference]: With dead ends: 149 [2020-10-15 20:26:17,730 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 20:26:17,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=712, Invalid=1838, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:26:17,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 20:26:17,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 78. [2020-10-15 20:26:17,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 20:26:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 193 transitions. [2020-10-15 20:26:17,733 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 193 transitions. Word has length 29 [2020-10-15 20:26:17,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:17,733 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 193 transitions. [2020-10-15 20:26:17,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:17,733 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 193 transitions. [2020-10-15 20:26:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:17,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:17,733 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:17,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-15 20:26:17,934 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:17,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:17,934 INFO L82 PathProgramCache]: Analyzing trace with hash 831173330, now seen corresponding path program 243 times [2020-10-15 20:26:17,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:17,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96204658] [2020-10-15 20:26:17,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:18,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96204658] [2020-10-15 20:26:18,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786792730] [2020-10-15 20:26:18,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:18,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 20:26:18,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:18,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:18,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:18,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:18,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:18,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361343444] [2020-10-15 20:26:18,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:18,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:18,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:18,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:18,453 INFO L87 Difference]: Start difference. First operand 78 states and 193 transitions. Second operand 25 states. [2020-10-15 20:26:19,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:19,380 INFO L93 Difference]: Finished difference Result 149 states and 337 transitions. [2020-10-15 20:26:19,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:26:19,381 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:19,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:19,381 INFO L225 Difference]: With dead ends: 149 [2020-10-15 20:26:19,381 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 20:26:19,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=728, Invalid=1924, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:26:19,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 20:26:19,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 81. [2020-10-15 20:26:19,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:26:19,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 201 transitions. [2020-10-15 20:26:19,384 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 201 transitions. Word has length 29 [2020-10-15 20:26:19,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:19,384 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 201 transitions. [2020-10-15 20:26:19,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:19,384 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 201 transitions. [2020-10-15 20:26:19,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:19,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:19,385 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:19,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2020-10-15 20:26:19,585 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:19,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:19,586 INFO L82 PathProgramCache]: Analyzing trace with hash -716985290, now seen corresponding path program 244 times [2020-10-15 20:26:19,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:19,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015765635] [2020-10-15 20:26:19,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:20,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015765635] [2020-10-15 20:26:20,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244489326] [2020-10-15 20:26:20,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:20,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:26:20,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:20,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:20,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:20,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:20,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:20,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:20,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090083433] [2020-10-15 20:26:20,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:20,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:20,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:20,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:20,155 INFO L87 Difference]: Start difference. First operand 81 states and 201 transitions. Second operand 26 states. [2020-10-15 20:26:21,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:21,235 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-10-15 20:26:21,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:26:21,236 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:21,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:21,237 INFO L225 Difference]: With dead ends: 146 [2020-10-15 20:26:21,237 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 20:26:21,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=731, Invalid=2025, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:26:21,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 20:26:21,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 80. [2020-10-15 20:26:21,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:26:21,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 199 transitions. [2020-10-15 20:26:21,239 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 199 transitions. Word has length 29 [2020-10-15 20:26:21,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:21,240 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 199 transitions. [2020-10-15 20:26:21,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:21,240 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 199 transitions. [2020-10-15 20:26:21,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:21,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:21,240 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:21,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-15 20:26:21,442 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:21,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:21,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2018774476, now seen corresponding path program 245 times [2020-10-15 20:26:21,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:21,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193277662] [2020-10-15 20:26:21,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:21,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193277662] [2020-10-15 20:26:21,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73628663] [2020-10-15 20:26:21,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:21,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 20:26:21,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:21,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:21,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:21,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:21,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:21,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206594280] [2020-10-15 20:26:21,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:21,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:21,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:21,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:21,949 INFO L87 Difference]: Start difference. First operand 80 states and 199 transitions. Second operand 25 states. [2020-10-15 20:26:23,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:23,000 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-10-15 20:26:23,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:26:23,001 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:23,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:23,002 INFO L225 Difference]: With dead ends: 147 [2020-10-15 20:26:23,002 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 20:26:23,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=762, Invalid=2100, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:26:23,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 20:26:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 83. [2020-10-15 20:26:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 20:26:23,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 207 transitions. [2020-10-15 20:26:23,004 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 207 transitions. Word has length 29 [2020-10-15 20:26:23,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:23,004 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 207 transitions. [2020-10-15 20:26:23,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 207 transitions. [2020-10-15 20:26:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:23,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:23,005 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:23,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-15 20:26:23,206 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:23,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:23,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1465644184, now seen corresponding path program 246 times [2020-10-15 20:26:23,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:23,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544953766] [2020-10-15 20:26:23,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:23,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544953766] [2020-10-15 20:26:23,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848090353] [2020-10-15 20:26:23,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:23,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 20:26:23,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:23,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:23,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:23,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:23,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:23,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:23,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560435492] [2020-10-15 20:26:23,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:23,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:23,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:23,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:23,759 INFO L87 Difference]: Start difference. First operand 83 states and 207 transitions. Second operand 26 states. [2020-10-15 20:26:24,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:24,933 INFO L93 Difference]: Finished difference Result 144 states and 329 transitions. [2020-10-15 20:26:24,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:26:24,934 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:24,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:24,934 INFO L225 Difference]: With dead ends: 144 [2020-10-15 20:26:24,934 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 20:26:24,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=766, Invalid=2204, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:26:24,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 20:26:24,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2020-10-15 20:26:24,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:26:24,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 205 transitions. [2020-10-15 20:26:24,936 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 205 transitions. Word has length 29 [2020-10-15 20:26:24,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:24,936 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 205 transitions. [2020-10-15 20:26:24,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:24,936 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 205 transitions. [2020-10-15 20:26:24,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:24,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:24,937 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:25,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:25,138 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:25,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:25,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1517920790, now seen corresponding path program 247 times [2020-10-15 20:26:25,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:25,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378043793] [2020-10-15 20:26:25,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:25,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378043793] [2020-10-15 20:26:25,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635894543] [2020-10-15 20:26:25,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:25,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:25,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:25,645 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:25,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:25,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:25,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655327270] [2020-10-15 20:26:25,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:25,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:25,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:25,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:25,646 INFO L87 Difference]: Start difference. First operand 82 states and 205 transitions. Second operand 25 states. [2020-10-15 20:26:26,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:26,825 INFO L93 Difference]: Finished difference Result 145 states and 333 transitions. [2020-10-15 20:26:26,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:26:26,829 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:26,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:26,829 INFO L225 Difference]: With dead ends: 145 [2020-10-15 20:26:26,829 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 20:26:26,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:26:26,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 20:26:26,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 85. [2020-10-15 20:26:26,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 20:26:26,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 213 transitions. [2020-10-15 20:26:26,831 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 213 transitions. Word has length 29 [2020-10-15 20:26:26,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:26,831 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 213 transitions. [2020-10-15 20:26:26,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:26,831 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 213 transitions. [2020-10-15 20:26:26,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:26,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:26,832 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:27,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2020-10-15 20:26:27,038 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:27,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:27,038 INFO L82 PathProgramCache]: Analyzing trace with hash -900797062, now seen corresponding path program 248 times [2020-10-15 20:26:27,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:27,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289878138] [2020-10-15 20:26:27,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:27,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289878138] [2020-10-15 20:26:27,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962159647] [2020-10-15 20:26:27,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:27,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:26:27,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:27,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:27,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:27,560 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:27,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:27,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:27,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367493173] [2020-10-15 20:26:27,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:27,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:27,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:27,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:27,579 INFO L87 Difference]: Start difference. First operand 85 states and 213 transitions. Second operand 26 states. [2020-10-15 20:26:28,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:28,878 INFO L93 Difference]: Finished difference Result 142 states and 327 transitions. [2020-10-15 20:26:28,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:26:28,879 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:28,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:28,879 INFO L225 Difference]: With dead ends: 142 [2020-10-15 20:26:28,879 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 20:26:28,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=817, Invalid=2375, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:26:28,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 20:26:28,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-10-15 20:26:28,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 20:26:28,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 211 transitions. [2020-10-15 20:26:28,882 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 211 transitions. Word has length 29 [2020-10-15 20:26:28,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:28,882 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 211 transitions. [2020-10-15 20:26:28,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:28,882 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 211 transitions. [2020-10-15 20:26:28,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:28,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:28,883 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:29,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:29,083 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:29,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:29,084 INFO L82 PathProgramCache]: Analyzing trace with hash -212475272, now seen corresponding path program 249 times [2020-10-15 20:26:29,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:29,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218520633] [2020-10-15 20:26:29,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:29,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218520633] [2020-10-15 20:26:29,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705629311] [2020-10-15 20:26:29,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:29,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 20:26:29,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:29,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:29,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:29,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:29,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:29,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705070123] [2020-10-15 20:26:29,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:29,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:29,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:29,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:29,584 INFO L87 Difference]: Start difference. First operand 84 states and 211 transitions. Second operand 25 states. [2020-10-15 20:26:30,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:30,803 INFO L93 Difference]: Finished difference Result 143 states and 331 transitions. [2020-10-15 20:26:30,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:26:30,804 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:30,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:30,804 INFO L225 Difference]: With dead ends: 143 [2020-10-15 20:26:30,804 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 20:26:30,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=878, Invalid=2428, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:26:30,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 20:26:30,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 87. [2020-10-15 20:26:30,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:26:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 219 transitions. [2020-10-15 20:26:30,806 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 219 transitions. Word has length 29 [2020-10-15 20:26:30,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:30,806 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 219 transitions. [2020-10-15 20:26:30,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:30,806 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 219 transitions. [2020-10-15 20:26:30,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:30,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:30,807 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:31,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:31,007 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:31,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:31,008 INFO L82 PathProgramCache]: Analyzing trace with hash 772716252, now seen corresponding path program 250 times [2020-10-15 20:26:31,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:31,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411507697] [2020-10-15 20:26:31,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:31,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411507697] [2020-10-15 20:26:31,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229176985] [2020-10-15 20:26:31,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:31,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:26:31,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:31,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:31,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:31,511 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:31,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:31,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:31,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579148195] [2020-10-15 20:26:31,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:31,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:31,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:31,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:31,531 INFO L87 Difference]: Start difference. First operand 87 states and 219 transitions. Second operand 26 states. [2020-10-15 20:26:32,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:32,936 INFO L93 Difference]: Finished difference Result 140 states and 325 transitions. [2020-10-15 20:26:32,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:26:32,937 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:32,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:32,937 INFO L225 Difference]: With dead ends: 140 [2020-10-15 20:26:32,937 INFO L226 Difference]: Without dead ends: 134 [2020-10-15 20:26:32,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=884, Invalid=2538, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 20:26:32,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-15 20:26:32,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 86. [2020-10-15 20:26:32,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:26:32,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 217 transitions. [2020-10-15 20:26:32,939 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 217 transitions. Word has length 29 [2020-10-15 20:26:32,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:32,939 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 217 transitions. [2020-10-15 20:26:32,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:32,939 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 217 transitions. [2020-10-15 20:26:32,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:32,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:32,939 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:33,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:33,140 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:33,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:33,141 INFO L82 PathProgramCache]: Analyzing trace with hash -844442790, now seen corresponding path program 251 times [2020-10-15 20:26:33,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:33,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303295257] [2020-10-15 20:26:33,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:33,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:33,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303295257] [2020-10-15 20:26:33,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86246223] [2020-10-15 20:26:33,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:33,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 20:26:33,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:33,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:33,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:33,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:33,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:33,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749836685] [2020-10-15 20:26:33,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:33,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:33,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:33,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:33,623 INFO L87 Difference]: Start difference. First operand 86 states and 217 transitions. Second operand 25 states. [2020-10-15 20:26:34,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:34,938 INFO L93 Difference]: Finished difference Result 141 states and 329 transitions. [2020-10-15 20:26:34,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:26:34,939 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:34,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:34,940 INFO L225 Difference]: With dead ends: 141 [2020-10-15 20:26:34,940 INFO L226 Difference]: Without dead ends: 135 [2020-10-15 20:26:34,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=960, Invalid=2580, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:26:34,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-15 20:26:34,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 89. [2020-10-15 20:26:34,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 20:26:34,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-10-15 20:26:34,943 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 29 [2020-10-15 20:26:34,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:34,943 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-10-15 20:26:34,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:34,943 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-10-15 20:26:34,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:34,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:34,943 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:35,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:35,147 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:35,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:35,148 INFO L82 PathProgramCache]: Analyzing trace with hash 412446910, now seen corresponding path program 252 times [2020-10-15 20:26:35,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:35,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425452847] [2020-10-15 20:26:35,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:35,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425452847] [2020-10-15 20:26:35,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90481480] [2020-10-15 20:26:35,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:35,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 20:26:35,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:35,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:35,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:35,637 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:35,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:35,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:35,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523984123] [2020-10-15 20:26:35,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:35,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:35,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:35,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:35,661 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 26 states. [2020-10-15 20:26:37,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:37,220 INFO L93 Difference]: Finished difference Result 138 states and 323 transitions. [2020-10-15 20:26:37,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:26:37,222 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:37,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:37,222 INFO L225 Difference]: With dead ends: 138 [2020-10-15 20:26:37,222 INFO L226 Difference]: Without dead ends: 132 [2020-10-15 20:26:37,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=967, Invalid=2693, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:26:37,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-15 20:26:37,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 88. [2020-10-15 20:26:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 20:26:37,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-10-15 20:26:37,226 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 29 [2020-10-15 20:26:37,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:37,226 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-10-15 20:26:37,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:37,226 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-10-15 20:26:37,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:37,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:37,227 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:37,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:37,427 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:37,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:37,428 INFO L82 PathProgramCache]: Analyzing trace with hash 2028639420, now seen corresponding path program 253 times [2020-10-15 20:26:37,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:37,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123388331] [2020-10-15 20:26:37,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:37,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123388331] [2020-10-15 20:26:37,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988979791] [2020-10-15 20:26:37,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:37,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:37,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:37,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:37,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:37,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:37,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644783152] [2020-10-15 20:26:37,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:37,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:37,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:37,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:37,922 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 25 states. [2020-10-15 20:26:39,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:39,308 INFO L93 Difference]: Finished difference Result 139 states and 327 transitions. [2020-10-15 20:26:39,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 20:26:39,309 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:39,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:39,309 INFO L225 Difference]: With dead ends: 139 [2020-10-15 20:26:39,309 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 20:26:39,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1058, Invalid=2724, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 20:26:39,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 20:26:39,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 91. [2020-10-15 20:26:39,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 20:26:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 231 transitions. [2020-10-15 20:26:39,312 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 231 transitions. Word has length 29 [2020-10-15 20:26:39,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:39,312 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 231 transitions. [2020-10-15 20:26:39,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:39,312 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 231 transitions. [2020-10-15 20:26:39,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:39,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:39,313 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:39,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2020-10-15 20:26:39,519 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:39,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:39,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1746584800, now seen corresponding path program 254 times [2020-10-15 20:26:39,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:39,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575847791] [2020-10-15 20:26:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:39,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575847791] [2020-10-15 20:26:39,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197159776] [2020-10-15 20:26:39,934 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:39,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:26:39,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:39,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:39,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:40,022 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:40,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:40,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:40,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224880835] [2020-10-15 20:26:40,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:40,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:40,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:40,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:40,046 INFO L87 Difference]: Start difference. First operand 91 states and 231 transitions. Second operand 26 states. [2020-10-15 20:26:41,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:41,763 INFO L93 Difference]: Finished difference Result 136 states and 321 transitions. [2020-10-15 20:26:41,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:26:41,765 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:41,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:41,765 INFO L225 Difference]: With dead ends: 136 [2020-10-15 20:26:41,766 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 20:26:41,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1066, Invalid=2840, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:26:41,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 20:26:41,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2020-10-15 20:26:41,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 20:26:41,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 229 transitions. [2020-10-15 20:26:41,768 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 229 transitions. Word has length 29 [2020-10-15 20:26:41,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:41,768 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 229 transitions. [2020-10-15 20:26:41,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:41,769 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 229 transitions. [2020-10-15 20:26:41,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:41,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:41,769 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:41,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-15 20:26:41,974 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:41,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:41,975 INFO L82 PathProgramCache]: Analyzing trace with hash -91273570, now seen corresponding path program 255 times [2020-10-15 20:26:41,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:41,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509600180] [2020-10-15 20:26:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:42,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509600180] [2020-10-15 20:26:42,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4652166] [2020-10-15 20:26:42,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:42,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 20:26:42,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:42,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:42,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:42,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:42,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:42,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832183321] [2020-10-15 20:26:42,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:42,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:42,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:42,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:42,450 INFO L87 Difference]: Start difference. First operand 90 states and 229 transitions. Second operand 25 states. [2020-10-15 20:26:43,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:43,949 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-15 20:26:43,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:26:43,950 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:43,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:43,950 INFO L225 Difference]: With dead ends: 137 [2020-10-15 20:26:43,950 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 20:26:43,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1172, Invalid=2860, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 20:26:43,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 20:26:43,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2020-10-15 20:26:43,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:26:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:26:43,954 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 29 [2020-10-15 20:26:43,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:43,954 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:26:43,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:43,954 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:26:43,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:43,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:43,955 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:44,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-10-15 20:26:44,156 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:44,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:44,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1811401214, now seen corresponding path program 256 times [2020-10-15 20:26:44,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:44,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121286736] [2020-10-15 20:26:44,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:44,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121286736] [2020-10-15 20:26:44,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893852771] [2020-10-15 20:26:44,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:44,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:26:44,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:44,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:44,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:44,641 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:44,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:44,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:44,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202055091] [2020-10-15 20:26:44,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:44,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:44,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:44,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:44,666 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 26 states. [2020-10-15 20:26:46,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:46,480 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-15 20:26:46,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:26:46,481 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:46,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:46,481 INFO L225 Difference]: With dead ends: 134 [2020-10-15 20:26:46,481 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 20:26:46,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1181, Invalid=2979, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 20:26:46,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 20:26:46,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 92. [2020-10-15 20:26:46,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:26:46,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:26:46,483 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 29 [2020-10-15 20:26:46,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:46,484 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:26:46,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:46,484 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:26:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:46,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:46,484 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:46,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:46,685 INFO L429 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:46,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:46,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1340405504, now seen corresponding path program 257 times [2020-10-15 20:26:46,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:46,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294588059] [2020-10-15 20:26:46,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:47,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294588059] [2020-10-15 20:26:47,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722205962] [2020-10-15 20:26:47,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:47,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 20:26:47,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:47,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:47,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:47,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:47,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:47,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794051612] [2020-10-15 20:26:47,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:47,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:47,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:47,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:47,174 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 25 states. [2020-10-15 20:26:48,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:48,746 INFO L93 Difference]: Finished difference Result 135 states and 323 transitions. [2020-10-15 20:26:48,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 20:26:48,747 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:48,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:48,748 INFO L225 Difference]: With dead ends: 135 [2020-10-15 20:26:48,748 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 20:26:48,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1302, Invalid=2988, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 20:26:48,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 20:26:48,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2020-10-15 20:26:48,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 20:26:48,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-10-15 20:26:48,759 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 29 [2020-10-15 20:26:48,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:48,759 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-10-15 20:26:48,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:48,759 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-10-15 20:26:48,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:48,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:48,759 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:48,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-10-15 20:26:48,965 INFO L429 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:48,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:48,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1324318364, now seen corresponding path program 258 times [2020-10-15 20:26:48,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:48,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447302778] [2020-10-15 20:26:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:49,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447302778] [2020-10-15 20:26:49,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664697045] [2020-10-15 20:26:49,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:49,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 20:26:49,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:49,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:49,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:49,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:49,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:49,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:49,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591877066] [2020-10-15 20:26:49,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:49,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:49,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:49,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:49,471 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 26 states. [2020-10-15 20:26:51,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:51,447 INFO L93 Difference]: Finished difference Result 132 states and 317 transitions. [2020-10-15 20:26:51,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 20:26:51,449 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:51,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:51,449 INFO L225 Difference]: With dead ends: 132 [2020-10-15 20:26:51,449 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 20:26:51,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1312, Invalid=3110, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 20:26:51,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 20:26:51,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2020-10-15 20:26:51,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 20:26:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-10-15 20:26:51,452 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 29 [2020-10-15 20:26:51,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:51,452 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-10-15 20:26:51,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:51,452 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-10-15 20:26:51,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:51,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:51,453 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:51,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:51,653 INFO L429 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:51,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:51,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1323828254, now seen corresponding path program 259 times [2020-10-15 20:26:51,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:51,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229497145] [2020-10-15 20:26:51,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:52,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229497145] [2020-10-15 20:26:52,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065025063] [2020-10-15 20:26:52,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:52,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:26:52,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:52,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:52,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-15 20:26:52,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086197712] [2020-10-15 20:26:52,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:26:52,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:52,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:26:52,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:26:52,150 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 25 states. [2020-10-15 20:26:53,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:53,847 INFO L93 Difference]: Finished difference Result 152 states and 367 transitions. [2020-10-15 20:26:53,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 20:26:53,848 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-15 20:26:53,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:53,848 INFO L225 Difference]: With dead ends: 152 [2020-10-15 20:26:53,848 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 20:26:53,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1448, Invalid=3108, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 20:26:53,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 20:26:53,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2020-10-15 20:26:53,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 20:26:53,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 261 transitions. [2020-10-15 20:26:53,850 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 261 transitions. Word has length 29 [2020-10-15 20:26:53,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:53,851 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 261 transitions. [2020-10-15 20:26:53,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:26:53,851 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 261 transitions. [2020-10-15 20:26:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:26:53,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:53,851 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:54,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2020-10-15 20:26:54,056 INFO L429 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:54,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:54,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1323811514, now seen corresponding path program 260 times [2020-10-15 20:26:54,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:54,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506754363] [2020-10-15 20:26:54,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:54,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506754363] [2020-10-15 20:26:54,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031616955] [2020-10-15 20:26:54,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:54,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:26:54,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:54,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:26:54,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:54,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:54,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-15 20:26:54,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845801754] [2020-10-15 20:26:54,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:54,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:54,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:54,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:54,581 INFO L87 Difference]: Start difference. First operand 100 states and 261 transitions. Second operand 26 states. [2020-10-15 20:26:56,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:56,644 INFO L93 Difference]: Finished difference Result 133 states and 323 transitions. [2020-10-15 20:26:56,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 20:26:56,645 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-15 20:26:56,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:56,646 INFO L225 Difference]: With dead ends: 133 [2020-10-15 20:26:56,646 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 20:26:56,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1321, Invalid=3371, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 20:26:56,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 20:26:56,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2020-10-15 20:26:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 20:26:56,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-10-15 20:26:56,649 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-10-15 20:26:56,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:56,650 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-10-15 20:26:56,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:56,650 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-10-15 20:26:56,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:26:56,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:56,650 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:56,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:56,858 INFO L429 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:56,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:56,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1170458439, now seen corresponding path program 261 times [2020-10-15 20:26:56,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:56,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592329563] [2020-10-15 20:26:56,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:57,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592329563] [2020-10-15 20:26:57,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087273966] [2020-10-15 20:26:57,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:57,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 20:26:57,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:57,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:26:57,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:57,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:57,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:26:57,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894686947] [2020-10-15 20:26:57,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:26:57,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:57,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:26:57,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:26:57,546 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 26 states. [2020-10-15 20:26:58,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:26:58,458 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-10-15 20:26:58,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:26:58,460 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:26:58,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:26:58,460 INFO L225 Difference]: With dead ends: 154 [2020-10-15 20:26:58,461 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 20:26:58,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=717, Invalid=1635, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:26:58,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 20:26:58,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 99. [2020-10-15 20:26:58,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:26:58,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:26:58,464 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 20:26:58,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:26:58,464 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:26:58,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:26:58,464 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:26:58,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:26:58,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:26:58,464 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:26:58,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:58,665 INFO L429 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:26:58,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:26:58,666 INFO L82 PathProgramCache]: Analyzing trace with hash 2085740573, now seen corresponding path program 262 times [2020-10-15 20:26:58,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:26:58,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588748757] [2020-10-15 20:26:58,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:26:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:26:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:59,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588748757] [2020-10-15 20:26:59,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046442829] [2020-10-15 20:26:59,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:26:59,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:26:59,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:26:59,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:26:59,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:26:59,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:26:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:26:59,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:26:59,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:26:59,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956392280] [2020-10-15 20:26:59,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:26:59,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:26:59,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:26:59,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:26:59,357 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 20:27:00,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:00,410 INFO L93 Difference]: Finished difference Result 151 states and 357 transitions. [2020-10-15 20:27:00,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:27:00,411 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:27:00,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:00,412 INFO L225 Difference]: With dead ends: 151 [2020-10-15 20:27:00,412 INFO L226 Difference]: Without dead ends: 145 [2020-10-15 20:27:00,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=770, Invalid=1882, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:27:00,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-15 20:27:00,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 98. [2020-10-15 20:27:00,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:27:00,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:27:00,414 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 20:27:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:00,414 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:27:00,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:27:00,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:00,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:00,415 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:00,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:00,615 INFO L429 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:00,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:00,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1794443493, now seen corresponding path program 263 times [2020-10-15 20:27:00,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:00,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553284773] [2020-10-15 20:27:00,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:01,145 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:01,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553284773] [2020-10-15 20:27:01,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267924752] [2020-10-15 20:27:01,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:01,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 20:27:01,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:01,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:01,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:01,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:01,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:27:01,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345679789] [2020-10-15 20:27:01,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:27:01,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:01,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:27:01,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:27:01,223 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 20:27:02,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:02,261 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-15 20:27:02,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:27:02,262 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:27:02,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:02,262 INFO L225 Difference]: With dead ends: 148 [2020-10-15 20:27:02,262 INFO L226 Difference]: Without dead ends: 142 [2020-10-15 20:27:02,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=720, Invalid=1830, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:27:02,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-15 20:27:02,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2020-10-15 20:27:02,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:27:02,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:27:02,265 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 20:27:02,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:02,265 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:27:02,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:27:02,265 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:27:02,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:02,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:02,266 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:02,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:02,467 INFO L429 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:02,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:02,467 INFO L82 PathProgramCache]: Analyzing trace with hash 778774399, now seen corresponding path program 264 times [2020-10-15 20:27:02,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:02,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105793754] [2020-10-15 20:27:02,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:03,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105793754] [2020-10-15 20:27:03,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642047704] [2020-10-15 20:27:03,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:03,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 20:27:03,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:03,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:03,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:03,115 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:03,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:03,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:27:03,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494610835] [2020-10-15 20:27:03,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:03,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:03,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:03,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:03,139 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 20:27:04,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:04,376 INFO L93 Difference]: Finished difference Result 147 states and 349 transitions. [2020-10-15 20:27:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:27:04,378 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:27:04,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:04,378 INFO L225 Difference]: With dead ends: 147 [2020-10-15 20:27:04,379 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 20:27:04,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=780, Invalid=2082, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:27:04,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 20:27:04,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2020-10-15 20:27:04,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:27:04,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:27:04,381 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 20:27:04,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:04,381 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:27:04,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:04,382 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:27:04,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:04,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:04,382 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:04,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:04,583 INFO L429 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:04,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:04,583 INFO L82 PathProgramCache]: Analyzing trace with hash -405150211, now seen corresponding path program 265 times [2020-10-15 20:27:04,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:04,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934997976] [2020-10-15 20:27:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:05,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934997976] [2020-10-15 20:27:05,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945800993] [2020-10-15 20:27:05,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:05,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:05,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:05,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:05,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:27:05,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145355457] [2020-10-15 20:27:05,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:27:05,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:05,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:27:05,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:27:05,186 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 20:27:06,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:06,332 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-10-15 20:27:06,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:27:06,333 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:27:06,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:06,334 INFO L225 Difference]: With dead ends: 144 [2020-10-15 20:27:06,334 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 20:27:06,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=739, Invalid=2017, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:27:06,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 20:27:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 99. [2020-10-15 20:27:06,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:27:06,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:27:06,336 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 20:27:06,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:06,337 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:27:06,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:27:06,337 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:27:06,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:06,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:06,337 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:06,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2020-10-15 20:27:06,538 INFO L429 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:06,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1953308831, now seen corresponding path program 266 times [2020-10-15 20:27:06,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:06,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927073148] [2020-10-15 20:27:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:07,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927073148] [2020-10-15 20:27:07,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001386395] [2020-10-15 20:27:07,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:07,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:27:07,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:07,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:07,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:07,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:07,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:07,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:27:07,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563872555] [2020-10-15 20:27:07,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:07,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:07,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:07,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:07,213 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 20:27:08,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:08,636 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-10-15 20:27:08,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:27:08,638 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:27:08,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:08,638 INFO L225 Difference]: With dead ends: 143 [2020-10-15 20:27:08,638 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 20:27:08,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=806, Invalid=2274, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:27:08,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 20:27:08,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2020-10-15 20:27:08,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:27:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:27:08,641 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 20:27:08,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:08,642 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:27:08,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:08,642 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:27:08,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:08,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:08,642 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:08,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-10-15 20:27:08,843 INFO L429 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:08,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:08,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1039869279, now seen corresponding path program 267 times [2020-10-15 20:27:08,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:08,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772747226] [2020-10-15 20:27:08,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:09,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772747226] [2020-10-15 20:27:09,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507921550] [2020-10-15 20:27:09,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:09,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 20:27:09,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:09,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:09,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:09,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:09,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:27:09,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911671426] [2020-10-15 20:27:09,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:27:09,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:09,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:27:09,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:27:09,425 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 20:27:10,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:10,721 INFO L93 Difference]: Finished difference Result 140 states and 335 transitions. [2020-10-15 20:27:10,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:27:10,723 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:27:10,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:10,723 INFO L225 Difference]: With dead ends: 140 [2020-10-15 20:27:10,723 INFO L226 Difference]: Without dead ends: 134 [2020-10-15 20:27:10,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=774, Invalid=2196, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:27:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-15 20:27:10,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2020-10-15 20:27:10,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:27:10,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:27:10,726 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 20:27:10,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:10,726 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:27:10,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:27:10,726 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:27:10,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:10,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:10,726 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:10,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2020-10-15 20:27:10,927 INFO L429 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:10,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:10,928 INFO L82 PathProgramCache]: Analyzing trace with hash 229320643, now seen corresponding path program 268 times [2020-10-15 20:27:10,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:10,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116781093] [2020-10-15 20:27:10,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:11,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116781093] [2020-10-15 20:27:11,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133876589] [2020-10-15 20:27:11,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:11,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:27:11,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:11,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:11,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:11,549 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:11,568 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:11,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:11,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:27:11,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859642990] [2020-10-15 20:27:11,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:11,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:11,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:11,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:11,570 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 20:27:13,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:13,136 INFO L93 Difference]: Finished difference Result 139 states and 333 transitions. [2020-10-15 20:27:13,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:27:13,138 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:27:13,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:13,138 INFO L225 Difference]: With dead ends: 139 [2020-10-15 20:27:13,139 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 20:27:13,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=848, Invalid=2458, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:27:13,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 20:27:13,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2020-10-15 20:27:13,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:27:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:27:13,141 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 20:27:13,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:13,141 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:27:13,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:13,142 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:27:13,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:13,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:13,142 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:13,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-10-15 20:27:13,343 INFO L429 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:13,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:13,343 INFO L82 PathProgramCache]: Analyzing trace with hash 281597249, now seen corresponding path program 269 times [2020-10-15 20:27:13,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:13,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52361938] [2020-10-15 20:27:13,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:13,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52361938] [2020-10-15 20:27:13,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137551254] [2020-10-15 20:27:13,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:13,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 20:27:13,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:13,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:13,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:13,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:13,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:27:13,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006872903] [2020-10-15 20:27:13,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:27:13,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:13,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:27:13,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:27:13,923 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 20:27:15,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:15,302 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-15 20:27:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:27:15,303 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:27:15,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:15,303 INFO L225 Difference]: With dead ends: 136 [2020-10-15 20:27:15,303 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 20:27:15,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=825, Invalid=2367, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:27:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 20:27:15,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 99. [2020-10-15 20:27:15,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:27:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:27:15,306 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 20:27:15,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:15,306 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:27:15,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:27:15,306 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:27:15,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:15,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:15,306 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:15,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:15,507 INFO L429 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:15,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:15,507 INFO L82 PathProgramCache]: Analyzing trace with hash -2137120603, now seen corresponding path program 270 times [2020-10-15 20:27:15,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:15,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504022182] [2020-10-15 20:27:15,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:16,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504022182] [2020-10-15 20:27:16,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779471262] [2020-10-15 20:27:16,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:16,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 20:27:16,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:16,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:16,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:16,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:16,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:16,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:27:16,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310923140] [2020-10-15 20:27:16,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:16,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:16,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:16,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:16,145 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 20:27:17,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:17,902 INFO L93 Difference]: Finished difference Result 135 states and 325 transitions. [2020-10-15 20:27:17,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:27:17,904 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:27:17,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:17,904 INFO L225 Difference]: With dead ends: 135 [2020-10-15 20:27:17,905 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 20:27:17,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=906, Invalid=2634, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:27:17,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 20:27:17,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 98. [2020-10-15 20:27:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:27:17,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:27:17,907 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 20:27:17,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:17,908 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:27:17,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:17,908 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:27:17,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:17,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:17,909 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:18,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2020-10-15 20:27:18,109 INFO L429 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:18,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:18,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1448798813, now seen corresponding path program 271 times [2020-10-15 20:27:18,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:18,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015253138] [2020-10-15 20:27:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:18,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015253138] [2020-10-15 20:27:18,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314879548] [2020-10-15 20:27:18,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:18,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:18,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:18,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:18,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:27:18,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226390042] [2020-10-15 20:27:18,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:27:18,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:18,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:27:18,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:27:18,665 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 20:27:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:20,197 INFO L93 Difference]: Finished difference Result 132 states and 319 transitions. [2020-10-15 20:27:20,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:27:20,198 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:27:20,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:20,199 INFO L225 Difference]: With dead ends: 132 [2020-10-15 20:27:20,199 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 20:27:20,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 20:27:20,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 20:27:20,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2020-10-15 20:27:20,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:27:20,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:27:20,201 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 20:27:20,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:20,201 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:27:20,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:27:20,202 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:27:20,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:20,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:20,202 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:20,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:20,403 INFO L429 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:20,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:20,403 INFO L82 PathProgramCache]: Analyzing trace with hash -463607289, now seen corresponding path program 272 times [2020-10-15 20:27:20,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:20,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840050010] [2020-10-15 20:27:20,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:20,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840050010] [2020-10-15 20:27:20,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945037421] [2020-10-15 20:27:20,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:20,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:27:20,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:20,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:20,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:20,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:21,008 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:21,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:21,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:27:21,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479068007] [2020-10-15 20:27:21,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:21,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:21,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:21,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:21,010 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 20:27:22,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:22,888 INFO L93 Difference]: Finished difference Result 131 states and 317 transitions. [2020-10-15 20:27:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:27:22,890 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:27:22,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:22,890 INFO L225 Difference]: With dead ends: 131 [2020-10-15 20:27:22,890 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 20:27:22,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=980, Invalid=2802, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 20:27:22,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 20:27:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2020-10-15 20:27:22,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:27:22,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:27:22,898 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 20:27:22,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:22,898 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:27:22,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:22,898 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:27:22,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:22,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:22,898 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:23,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:23,099 INFO L429 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:23,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:23,100 INFO L82 PathProgramCache]: Analyzing trace with hash -2080766331, now seen corresponding path program 273 times [2020-10-15 20:27:23,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:23,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865611346] [2020-10-15 20:27:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:23,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865611346] [2020-10-15 20:27:23,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992002028] [2020-10-15 20:27:23,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:23,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 20:27:23,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:23,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:23,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:23,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:23,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:27:23,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442972034] [2020-10-15 20:27:23,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:27:23,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:23,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:27:23,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:27:23,682 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 20:27:25,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:25,340 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-10-15 20:27:25,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:27:25,342 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:27:25,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:25,342 INFO L225 Difference]: With dead ends: 128 [2020-10-15 20:27:25,342 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 20:27:25,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=975, Invalid=2685, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:27:25,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 20:27:25,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2020-10-15 20:27:25,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:27:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:27:25,344 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 20:27:25,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:25,344 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:27:25,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:27:25,345 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:27:25,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:25,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:25,345 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:25,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:25,548 INFO L429 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:25,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:25,548 INFO L82 PathProgramCache]: Analyzing trace with hash -823876631, now seen corresponding path program 274 times [2020-10-15 20:27:25,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:25,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755152183] [2020-10-15 20:27:25,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:26,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755152183] [2020-10-15 20:27:26,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898499122] [2020-10-15 20:27:26,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:26,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:27:26,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:26,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:26,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:26,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:26,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:26,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:27:26,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889241439] [2020-10-15 20:27:26,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:26,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:26,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:26,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:26,140 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 20:27:28,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:28,209 INFO L93 Difference]: Finished difference Result 127 states and 309 transitions. [2020-10-15 20:27:28,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:27:28,211 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:27:28,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:28,211 INFO L225 Difference]: With dead ends: 127 [2020-10-15 20:27:28,211 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 20:27:28,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1070, Invalid=2962, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 20:27:28,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 20:27:28,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2020-10-15 20:27:28,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:27:28,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:27:28,214 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 20:27:28,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:28,214 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:27:28,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:28,214 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:27:28,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:28,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:28,214 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:28,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:28,415 INFO L429 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:28,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:28,415 INFO L82 PathProgramCache]: Analyzing trace with hash 792315879, now seen corresponding path program 275 times [2020-10-15 20:27:28,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:28,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854807136] [2020-10-15 20:27:28,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:28,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854807136] [2020-10-15 20:27:28,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406429224] [2020-10-15 20:27:28,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:28,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 20:27:28,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:28,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:28,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:28,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:28,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:27:28,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723716596] [2020-10-15 20:27:28,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:27:28,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:28,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:27:28,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:27:28,998 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 20:27:30,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:30,775 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-10-15 20:27:30,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 20:27:30,777 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:27:30,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:30,778 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:27:30,778 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 20:27:30,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1074, Invalid=2832, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:27:30,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 20:27:30,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2020-10-15 20:27:30,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:27:30,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:27:30,780 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 20:27:30,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:30,781 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:27:30,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:27:30,781 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:27:30,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:30,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:30,782 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:30,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2020-10-15 20:27:30,982 INFO L429 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:30,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:30,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1312058955, now seen corresponding path program 276 times [2020-10-15 20:27:30,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:30,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789169504] [2020-10-15 20:27:30,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:31,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789169504] [2020-10-15 20:27:31,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456324495] [2020-10-15 20:27:31,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:31,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 20:27:31,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:31,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:31,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:31,591 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:31,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:31,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:27:31,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275356906] [2020-10-15 20:27:31,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:31,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:31,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:31,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:31,619 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 20:27:33,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:33,884 INFO L93 Difference]: Finished difference Result 123 states and 301 transitions. [2020-10-15 20:27:33,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:27:33,885 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:27:33,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:33,886 INFO L225 Difference]: With dead ends: 123 [2020-10-15 20:27:33,886 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 20:27:33,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1176, Invalid=3114, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 20:27:33,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 20:27:33,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-15 20:27:33,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:27:33,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:27:33,888 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 20:27:33,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:33,888 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:27:33,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:33,888 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:27:33,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:33,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:33,889 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:34,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-10-15 20:27:34,089 INFO L429 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:34,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:34,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1327597111, now seen corresponding path program 277 times [2020-10-15 20:27:34,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:34,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120174796] [2020-10-15 20:27:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:34,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120174796] [2020-10-15 20:27:34,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213163448] [2020-10-15 20:27:34,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:34,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:34,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:34,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:34,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:27:34,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511880766] [2020-10-15 20:27:34,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:27:34,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:34,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:27:34,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:27:34,686 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 20:27:36,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:36,583 INFO L93 Difference]: Finished difference Result 120 states and 295 transitions. [2020-10-15 20:27:36,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:27:36,584 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:27:36,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:36,585 INFO L225 Difference]: With dead ends: 120 [2020-10-15 20:27:36,585 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 20:27:36,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1189, Invalid=2971, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 20:27:36,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 20:27:36,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2020-10-15 20:27:36,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:27:36,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:27:36,587 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 20:27:36,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:36,587 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:27:36,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:27:36,587 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:27:36,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:36,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:36,588 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:36,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2020-10-15 20:27:36,788 INFO L429 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:36,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:36,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1247242541, now seen corresponding path program 278 times [2020-10-15 20:27:36,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:36,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345886346] [2020-10-15 20:27:36,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:37,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345886346] [2020-10-15 20:27:37,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918406957] [2020-10-15 20:27:37,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:37,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:27:37,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:37,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:37,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:37,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:37,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:37,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:27:37,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579914306] [2020-10-15 20:27:37,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:37,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:37,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:37,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:37,424 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 20:27:39,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:39,784 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-15 20:27:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 20:27:39,786 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:27:39,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:39,787 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:27:39,787 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:27:39,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1298, Invalid=3258, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 20:27:39,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:27:39,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2020-10-15 20:27:39,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:27:39,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:27:39,789 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 20:27:39,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:39,789 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:27:39,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:39,790 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:27:39,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:39,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:39,790 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:39,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-10-15 20:27:39,991 INFO L429 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:39,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:39,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1718238251, now seen corresponding path program 279 times [2020-10-15 20:27:39,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:39,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363179833] [2020-10-15 20:27:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:40,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363179833] [2020-10-15 20:27:40,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582435625] [2020-10-15 20:27:40,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:40,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-15 20:27:40,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:40,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:40,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:40,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:40,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:27:40,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529875114] [2020-10-15 20:27:40,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:27:40,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:40,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:27:40,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:27:40,598 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 20:27:42,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:42,681 INFO L93 Difference]: Finished difference Result 116 states and 287 transitions. [2020-10-15 20:27:42,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 20:27:42,683 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:27:42,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:42,683 INFO L225 Difference]: With dead ends: 116 [2020-10-15 20:27:42,683 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 20:27:42,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1320, Invalid=3102, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 20:27:42,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 20:27:42,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-10-15 20:27:42,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:27:42,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:27:42,686 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-15 20:27:42,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:42,686 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:27:42,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:27:42,686 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:27:42,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:42,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:42,686 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:42,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:42,887 INFO L429 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:42,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:42,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1734325391, now seen corresponding path program 280 times [2020-10-15 20:27:42,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:42,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258427825] [2020-10-15 20:27:42,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:43,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258427825] [2020-10-15 20:27:43,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781836053] [2020-10-15 20:27:43,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:43,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:27:43,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:43,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:43,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:43,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:27:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:43,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:43,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:27:43,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183349607] [2020-10-15 20:27:43,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:43,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:43,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:43,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:43,518 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-15 20:27:46,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:46,200 INFO L93 Difference]: Finished difference Result 115 states and 285 transitions. [2020-10-15 20:27:46,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 20:27:46,202 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:27:46,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:46,203 INFO L225 Difference]: With dead ends: 115 [2020-10-15 20:27:46,203 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 20:27:46,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1436, Invalid=3394, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 20:27:46,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 20:27:46,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-10-15 20:27:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:27:46,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:27:46,206 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-15 20:27:46,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:46,206 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:27:46,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:46,206 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:27:46,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:46,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:46,206 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:46,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2020-10-15 20:27:46,407 INFO L429 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:46,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:46,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1734815501, now seen corresponding path program 281 times [2020-10-15 20:27:46,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:46,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101112715] [2020-10-15 20:27:46,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:46,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101112715] [2020-10-15 20:27:46,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675840200] [2020-10-15 20:27:46,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:46,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 20:27:46,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:46,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:46,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:47,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:47,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-15 20:27:47,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383249574] [2020-10-15 20:27:47,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 20:27:47,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:47,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 20:27:47,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:27:47,037 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-15 20:27:49,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:49,217 INFO L93 Difference]: Finished difference Result 131 states and 325 transitions. [2020-10-15 20:27:49,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 20:27:49,219 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-15 20:27:49,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:49,219 INFO L225 Difference]: With dead ends: 131 [2020-10-15 20:27:49,219 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 20:27:49,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1467, Invalid=3225, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 20:27:49,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 20:27:49,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2020-10-15 20:27:49,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-15 20:27:49,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 265 transitions. [2020-10-15 20:27:49,222 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 265 transitions. Word has length 30 [2020-10-15 20:27:49,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:49,222 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 265 transitions. [2020-10-15 20:27:49,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 20:27:49,223 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 265 transitions. [2020-10-15 20:27:49,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:49,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:49,223 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:49,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:49,424 INFO L429 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:49,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:49,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1734832241, now seen corresponding path program 282 times [2020-10-15 20:27:49,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:49,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149566946] [2020-10-15 20:27:49,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:49,951 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:49,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149566946] [2020-10-15 20:27:49,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056145314] [2020-10-15 20:27:49,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:50,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 20:27:50,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:50,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:27:50,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:50,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:50,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:27:50,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181220158] [2020-10-15 20:27:50,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:50,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:50,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:50,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:50,097 INFO L87 Difference]: Start difference. First operand 102 states and 265 transitions. Second operand 27 states. [2020-10-15 20:27:52,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:52,582 INFO L93 Difference]: Finished difference Result 110 states and 277 transitions. [2020-10-15 20:27:52,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 20:27:52,584 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:27:52,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:52,584 INFO L225 Difference]: With dead ends: 110 [2020-10-15 20:27:52,584 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 20:27:52,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1337, Invalid=3493, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 20:27:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 20:27:52,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2020-10-15 20:27:52,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 20:27:52,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 178 transitions. [2020-10-15 20:27:52,587 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 178 transitions. Word has length 30 [2020-10-15 20:27:52,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:52,587 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 178 transitions. [2020-10-15 20:27:52,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:52,587 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 178 transitions. [2020-10-15 20:27:52,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 20:27:52,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:52,588 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:52,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:52,788 INFO L429 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:52,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:52,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1911532333, now seen corresponding path program 283 times [2020-10-15 20:27:52,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:52,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705410681] [2020-10-15 20:27:52,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:53,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705410681] [2020-10-15 20:27:53,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876728992] [2020-10-15 20:27:53,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:53,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-15 20:27:53,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:53,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:27:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:53,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:53,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-15 20:27:53,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275081933] [2020-10-15 20:27:53,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:27:53,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:53,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:27:53,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:27:53,455 INFO L87 Difference]: Start difference. First operand 73 states and 178 transitions. Second operand 27 states. [2020-10-15 20:27:56,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:56,072 INFO L93 Difference]: Finished difference Result 132 states and 323 transitions. [2020-10-15 20:27:56,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 20:27:56,073 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-15 20:27:56,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:56,074 INFO L225 Difference]: With dead ends: 132 [2020-10-15 20:27:56,074 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 20:27:56,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1649, Invalid=3463, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 20:27:56,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 20:27:56,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2020-10-15 20:27:56,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 20:27:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 257 transitions. [2020-10-15 20:27:56,076 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 257 transitions. Word has length 30 [2020-10-15 20:27:56,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:56,077 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 257 transitions. [2020-10-15 20:27:56,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:27:56,077 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 257 transitions. [2020-10-15 20:27:56,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:27:56,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:56,077 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:56,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:56,278 INFO L429 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:56,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:56,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2054759070, now seen corresponding path program 284 times [2020-10-15 20:27:56,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:56,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128324228] [2020-10-15 20:27:56,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:27:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:56,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128324228] [2020-10-15 20:27:56,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636487004] [2020-10-15 20:27:56,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:56,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:27:56,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:27:56,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:27:56,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:27:56,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:27:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:27:56,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:27:56,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:27:56,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470576936] [2020-10-15 20:27:57,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:27:57,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:27:57,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:27:57,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:27:57,000 INFO L87 Difference]: Start difference. First operand 100 states and 257 transitions. Second operand 28 states. [2020-10-15 20:27:59,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:27:59,778 INFO L93 Difference]: Finished difference Result 108 states and 277 transitions. [2020-10-15 20:27:59,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 20:27:59,780 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:27:59,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:27:59,780 INFO L225 Difference]: With dead ends: 108 [2020-10-15 20:27:59,780 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:27:59,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1669, Invalid=3587, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 20:27:59,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:27:59,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2020-10-15 20:27:59,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:27:59,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-10-15 20:27:59,782 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 31 [2020-10-15 20:27:59,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:27:59,783 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-10-15 20:27:59,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:27:59,783 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-10-15 20:27:59,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:27:59,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:27:59,783 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:27:59,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:27:59,984 INFO L429 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:27:59,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:27:59,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1128130483, now seen corresponding path program 285 times [2020-10-15 20:27:59,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:27:59,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689003813] [2020-10-15 20:27:59,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:27:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:00,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689003813] [2020-10-15 20:28:00,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071490653] [2020-10-15 20:28:00,744 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:00,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 20:28:00,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:00,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:00,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:00,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:00,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:28:00,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847835610] [2020-10-15 20:28:00,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:28:00,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:00,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:28:00,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:28:00,818 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 27 states. [2020-10-15 20:28:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:01,951 INFO L93 Difference]: Finished difference Result 114 states and 265 transitions. [2020-10-15 20:28:01,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:28:01,953 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:28:01,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:01,954 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:28:01,954 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:28:01,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=783, Invalid=1667, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:28:01,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:28:01,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2020-10-15 20:28:01,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:28:01,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 201 transitions. [2020-10-15 20:28:01,956 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 201 transitions. Word has length 31 [2020-10-15 20:28:01,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:01,957 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 201 transitions. [2020-10-15 20:28:01,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:28:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 201 transitions. [2020-10-15 20:28:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:01,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:01,957 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:02,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:02,158 INFO L429 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:02,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:02,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1342928561, now seen corresponding path program 286 times [2020-10-15 20:28:02,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:02,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561356034] [2020-10-15 20:28:02,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:02,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561356034] [2020-10-15 20:28:02,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455579114] [2020-10-15 20:28:02,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:02,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:28:02,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:02,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:02,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:03,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:03,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:03,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:28:03,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070136339] [2020-10-15 20:28:03,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:03,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:03,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:03,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:03,021 INFO L87 Difference]: Start difference. First operand 82 states and 201 transitions. Second operand 28 states. [2020-10-15 20:28:04,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:04,380 INFO L93 Difference]: Finished difference Result 138 states and 313 transitions. [2020-10-15 20:28:04,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:28:04,381 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:28:04,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:04,382 INFO L225 Difference]: With dead ends: 138 [2020-10-15 20:28:04,382 INFO L226 Difference]: Without dead ends: 132 [2020-10-15 20:28:04,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=792, Invalid=1860, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:28:04,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-15 20:28:04,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2020-10-15 20:28:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:28:04,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 197 transitions. [2020-10-15 20:28:04,384 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 197 transitions. Word has length 31 [2020-10-15 20:28:04,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:04,384 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 197 transitions. [2020-10-15 20:28:04,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:04,385 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 197 transitions. [2020-10-15 20:28:04,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:04,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:04,385 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:04,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-10-15 20:28:04,586 INFO L429 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:04,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:04,586 INFO L82 PathProgramCache]: Analyzing trace with hash 517654063, now seen corresponding path program 287 times [2020-10-15 20:28:04,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:04,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088207572] [2020-10-15 20:28:04,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:05,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088207572] [2020-10-15 20:28:05,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305307470] [2020-10-15 20:28:05,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:05,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 20:28:05,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:05,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:05,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:05,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:05,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:28:05,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597352797] [2020-10-15 20:28:05,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:28:05,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:05,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:28:05,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:28:05,409 INFO L87 Difference]: Start difference. First operand 80 states and 197 transitions. Second operand 27 states. [2020-10-15 20:28:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:06,779 INFO L93 Difference]: Finished difference Result 139 states and 317 transitions. [2020-10-15 20:28:06,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:28:06,781 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:28:06,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:06,781 INFO L225 Difference]: With dead ends: 139 [2020-10-15 20:28:06,782 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 20:28:06,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=793, Invalid=1963, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:28:06,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 20:28:06,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 83. [2020-10-15 20:28:06,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 20:28:06,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 205 transitions. [2020-10-15 20:28:06,784 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 205 transitions. Word has length 31 [2020-10-15 20:28:06,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:06,784 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 205 transitions. [2020-10-15 20:28:06,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:28:06,784 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 205 transitions. [2020-10-15 20:28:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:06,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:06,784 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:06,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-10-15 20:28:06,985 INFO L429 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:06,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:06,986 INFO L82 PathProgramCache]: Analyzing trace with hash -521114221, now seen corresponding path program 288 times [2020-10-15 20:28:06,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:06,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852026530] [2020-10-15 20:28:06,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:07,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852026530] [2020-10-15 20:28:07,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663378351] [2020-10-15 20:28:07,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:07,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 20:28:07,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:07,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:07,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:07,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:07,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:07,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:28:07,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791877958] [2020-10-15 20:28:07,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:07,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:07,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:07,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:07,870 INFO L87 Difference]: Start difference. First operand 83 states and 205 transitions. Second operand 28 states. [2020-10-15 20:28:09,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:09,411 INFO L93 Difference]: Finished difference Result 159 states and 357 transitions. [2020-10-15 20:28:09,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:28:09,413 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:28:09,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:09,414 INFO L225 Difference]: With dead ends: 159 [2020-10-15 20:28:09,414 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 20:28:09,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=833, Invalid=2137, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:28:09,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 20:28:09,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 82. [2020-10-15 20:28:09,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:28:09,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 203 transitions. [2020-10-15 20:28:09,421 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 203 transitions. Word has length 31 [2020-10-15 20:28:09,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:09,421 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 203 transitions. [2020-10-15 20:28:09,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:09,421 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 203 transitions. [2020-10-15 20:28:09,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:09,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:09,422 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:09,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-10-15 20:28:09,622 INFO L429 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:09,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:09,623 INFO L82 PathProgramCache]: Analyzing trace with hash -106330991, now seen corresponding path program 289 times [2020-10-15 20:28:09,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:09,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801860857] [2020-10-15 20:28:09,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:10,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801860857] [2020-10-15 20:28:10,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916326737] [2020-10-15 20:28:10,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:10,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:10,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:10,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:10,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:28:10,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819247807] [2020-10-15 20:28:10,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:28:10,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:10,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:28:10,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:28:10,415 INFO L87 Difference]: Start difference. First operand 82 states and 203 transitions. Second operand 27 states. [2020-10-15 20:28:11,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:11,950 INFO L93 Difference]: Finished difference Result 159 states and 359 transitions. [2020-10-15 20:28:11,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:28:11,952 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:28:11,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:11,952 INFO L225 Difference]: With dead ends: 159 [2020-10-15 20:28:11,952 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 20:28:11,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=848, Invalid=2232, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:28:11,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 20:28:11,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 85. [2020-10-15 20:28:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 20:28:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 211 transitions. [2020-10-15 20:28:11,955 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 211 transitions. Word has length 31 [2020-10-15 20:28:11,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:11,955 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 211 transitions. [2020-10-15 20:28:11,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:28:11,955 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 211 transitions. [2020-10-15 20:28:11,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:11,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:11,956 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:12,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:12,156 INFO L429 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:12,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:12,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1828080395, now seen corresponding path program 290 times [2020-10-15 20:28:12,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:12,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063846182] [2020-10-15 20:28:12,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:12,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063846182] [2020-10-15 20:28:12,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111745469] [2020-10-15 20:28:12,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:12,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:28:12,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:12,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:12,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:13,003 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:13,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:13,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:28:13,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43390352] [2020-10-15 20:28:13,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:13,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:13,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:13,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:13,025 INFO L87 Difference]: Start difference. First operand 85 states and 211 transitions. Second operand 28 states. [2020-10-15 20:28:14,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:14,704 INFO L93 Difference]: Finished difference Result 156 states and 353 transitions. [2020-10-15 20:28:14,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:28:14,706 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:28:14,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:14,707 INFO L225 Difference]: With dead ends: 156 [2020-10-15 20:28:14,707 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 20:28:14,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=850, Invalid=2342, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:28:14,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 20:28:14,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 84. [2020-10-15 20:28:14,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 20:28:14,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 209 transitions. [2020-10-15 20:28:14,709 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 209 transitions. Word has length 31 [2020-10-15 20:28:14,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:14,710 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 209 transitions. [2020-10-15 20:28:14,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:14,710 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 209 transitions. [2020-10-15 20:28:14,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:14,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:14,710 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:14,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:14,911 INFO L429 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:14,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:14,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1282962291, now seen corresponding path program 291 times [2020-10-15 20:28:14,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:14,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156039742] [2020-10-15 20:28:14,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:15,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156039742] [2020-10-15 20:28:15,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409131573] [2020-10-15 20:28:15,627 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:15,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 20:28:15,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:15,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:15,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:15,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:15,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:28:15,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317762287] [2020-10-15 20:28:15,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:28:15,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:15,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:28:15,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:28:15,718 INFO L87 Difference]: Start difference. First operand 84 states and 209 transitions. Second operand 27 states. [2020-10-15 20:28:17,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:17,315 INFO L93 Difference]: Finished difference Result 157 states and 357 transitions. [2020-10-15 20:28:17,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:28:17,317 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:28:17,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:17,318 INFO L225 Difference]: With dead ends: 157 [2020-10-15 20:28:17,318 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 20:28:17,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=880, Invalid=2426, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:28:17,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 20:28:17,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 87. [2020-10-15 20:28:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:28:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 217 transitions. [2020-10-15 20:28:17,321 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 217 transitions. Word has length 31 [2020-10-15 20:28:17,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:17,321 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 217 transitions. [2020-10-15 20:28:17,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:28:17,322 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 217 transitions. [2020-10-15 20:28:17,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:17,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:17,322 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:17,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:17,523 INFO L429 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:17,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:17,523 INFO L82 PathProgramCache]: Analyzing trace with hash -265196329, now seen corresponding path program 292 times [2020-10-15 20:28:17,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:17,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103468165] [2020-10-15 20:28:17,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:18,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103468165] [2020-10-15 20:28:18,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187541803] [2020-10-15 20:28:18,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:18,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:28:18,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:18,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:18,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:18,342 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:18,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:18,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:28:18,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811084395] [2020-10-15 20:28:18,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:18,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:18,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:18,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:18,373 INFO L87 Difference]: Start difference. First operand 87 states and 217 transitions. Second operand 28 states. [2020-10-15 20:28:20,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:20,149 INFO L93 Difference]: Finished difference Result 154 states and 351 transitions. [2020-10-15 20:28:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:28:20,151 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:28:20,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:20,152 INFO L225 Difference]: With dead ends: 154 [2020-10-15 20:28:20,152 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 20:28:20,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=883, Invalid=2539, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 20:28:20,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 20:28:20,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 86. [2020-10-15 20:28:20,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:28:20,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 215 transitions. [2020-10-15 20:28:20,154 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 215 transitions. Word has length 31 [2020-10-15 20:28:20,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:20,155 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 215 transitions. [2020-10-15 20:28:20,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:20,155 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 215 transitions. [2020-10-15 20:28:20,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:20,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:20,155 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:20,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2020-10-15 20:28:20,356 INFO L429 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:20,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:20,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1566985515, now seen corresponding path program 293 times [2020-10-15 20:28:20,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:20,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956125413] [2020-10-15 20:28:20,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:21,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956125413] [2020-10-15 20:28:21,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735361046] [2020-10-15 20:28:21,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:21,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 20:28:21,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:21,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:21,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:21,122 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:21,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:21,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:28:21,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314140713] [2020-10-15 20:28:21,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:28:21,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:21,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:28:21,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:28:21,123 INFO L87 Difference]: Start difference. First operand 86 states and 215 transitions. Second operand 27 states. [2020-10-15 20:28:22,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:22,923 INFO L93 Difference]: Finished difference Result 155 states and 355 transitions. [2020-10-15 20:28:22,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:28:22,925 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:28:22,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:22,925 INFO L225 Difference]: With dead ends: 155 [2020-10-15 20:28:22,925 INFO L226 Difference]: Without dead ends: 149 [2020-10-15 20:28:22,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=928, Invalid=2612, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:28:22,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-15 20:28:22,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 89. [2020-10-15 20:28:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 20:28:22,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 223 transitions. [2020-10-15 20:28:22,928 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 223 transitions. Word has length 31 [2020-10-15 20:28:22,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:22,929 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 223 transitions. [2020-10-15 20:28:22,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:28:22,929 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 223 transitions. [2020-10-15 20:28:22,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:22,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:22,929 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:23,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:23,138 INFO L429 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:23,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:23,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1917433145, now seen corresponding path program 294 times [2020-10-15 20:28:23,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:23,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531900516] [2020-10-15 20:28:23,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:23,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531900516] [2020-10-15 20:28:23,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371167552] [2020-10-15 20:28:23,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:23,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 20:28:23,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:23,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:23,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:23,957 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:23,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:23,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:28:23,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763347531] [2020-10-15 20:28:23,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:23,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:23,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:23,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:23,984 INFO L87 Difference]: Start difference. First operand 89 states and 223 transitions. Second operand 28 states. [2020-10-15 20:28:26,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:26,049 INFO L93 Difference]: Finished difference Result 152 states and 349 transitions. [2020-10-15 20:28:26,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:28:26,051 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:28:26,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:26,052 INFO L225 Difference]: With dead ends: 152 [2020-10-15 20:28:26,052 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 20:28:26,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=932, Invalid=2728, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:28:26,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 20:28:26,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 88. [2020-10-15 20:28:26,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 20:28:26,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 221 transitions. [2020-10-15 20:28:26,055 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 221 transitions. Word has length 31 [2020-10-15 20:28:26,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:26,055 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 221 transitions. [2020-10-15 20:28:26,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:26,055 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 221 transitions. [2020-10-15 20:28:26,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:26,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:26,055 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:26,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:26,256 INFO L429 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:26,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:26,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1969709751, now seen corresponding path program 295 times [2020-10-15 20:28:26,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:26,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360377835] [2020-10-15 20:28:26,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:26,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:26,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360377835] [2020-10-15 20:28:26,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171079774] [2020-10-15 20:28:26,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:26,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:26,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:27,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:27,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:28:27,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630495564] [2020-10-15 20:28:27,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:28:27,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:27,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:28:27,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:28:27,010 INFO L87 Difference]: Start difference. First operand 88 states and 221 transitions. Second operand 27 states. [2020-10-15 20:28:28,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:28,921 INFO L93 Difference]: Finished difference Result 153 states and 353 transitions. [2020-10-15 20:28:28,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:28:28,923 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:28:28,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:28,924 INFO L225 Difference]: With dead ends: 153 [2020-10-15 20:28:28,924 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 20:28:28,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 20:28:28,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 20:28:28,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 91. [2020-10-15 20:28:28,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 20:28:28,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 229 transitions. [2020-10-15 20:28:28,926 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 229 transitions. Word has length 31 [2020-10-15 20:28:28,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:28,926 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 229 transitions. [2020-10-15 20:28:28,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:28:28,926 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 229 transitions. [2020-10-15 20:28:28,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:28,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:28,927 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:29,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:29,127 INFO L429 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:29,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:29,128 INFO L82 PathProgramCache]: Analyzing trace with hash -449008101, now seen corresponding path program 296 times [2020-10-15 20:28:29,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:29,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966149907] [2020-10-15 20:28:29,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:29,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:29,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966149907] [2020-10-15 20:28:29,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961319145] [2020-10-15 20:28:29,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:29,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:28:29,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:29,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:29,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:29,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:29,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:29,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:28:29,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809895258] [2020-10-15 20:28:29,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:29,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:29,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:29,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:29,925 INFO L87 Difference]: Start difference. First operand 91 states and 229 transitions. Second operand 28 states. [2020-10-15 20:28:32,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:32,190 INFO L93 Difference]: Finished difference Result 150 states and 347 transitions. [2020-10-15 20:28:32,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:28:32,193 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:28:32,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:32,194 INFO L225 Difference]: With dead ends: 150 [2020-10-15 20:28:32,194 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 20:28:32,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=997, Invalid=2909, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:28:32,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 20:28:32,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2020-10-15 20:28:32,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 20:28:32,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 227 transitions. [2020-10-15 20:28:32,200 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 227 transitions. Word has length 31 [2020-10-15 20:28:32,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:32,201 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 227 transitions. [2020-10-15 20:28:32,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:32,201 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 227 transitions. [2020-10-15 20:28:32,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:32,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:32,201 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:32,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:32,402 INFO L429 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:32,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:32,402 INFO L82 PathProgramCache]: Analyzing trace with hash 239313689, now seen corresponding path program 297 times [2020-10-15 20:28:32,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:32,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877255299] [2020-10-15 20:28:32,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:33,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877255299] [2020-10-15 20:28:33,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307151868] [2020-10-15 20:28:33,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:33,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 20:28:33,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:33,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:33,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:33,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:33,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:28:33,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413982790] [2020-10-15 20:28:33,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:28:33,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:33,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:28:33,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:28:33,174 INFO L87 Difference]: Start difference. First operand 90 states and 227 transitions. Second operand 27 states. [2020-10-15 20:28:35,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:35,308 INFO L93 Difference]: Finished difference Result 151 states and 351 transitions. [2020-10-15 20:28:35,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 20:28:35,310 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:28:35,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:35,311 INFO L225 Difference]: With dead ends: 151 [2020-10-15 20:28:35,311 INFO L226 Difference]: Without dead ends: 145 [2020-10-15 20:28:35,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1072, Invalid=2960, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 20:28:35,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-15 20:28:35,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 93. [2020-10-15 20:28:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:28:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 235 transitions. [2020-10-15 20:28:35,314 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 235 transitions. Word has length 31 [2020-10-15 20:28:35,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:35,314 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 235 transitions. [2020-10-15 20:28:35,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:28:35,314 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 235 transitions. [2020-10-15 20:28:35,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:35,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:35,314 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:35,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:35,515 INFO L429 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:35,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:35,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1224505213, now seen corresponding path program 298 times [2020-10-15 20:28:35,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:35,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802682618] [2020-10-15 20:28:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:36,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802682618] [2020-10-15 20:28:36,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576753654] [2020-10-15 20:28:36,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:36,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:28:36,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:36,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:36,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:36,294 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:36,323 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:36,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:36,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:28:36,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088074478] [2020-10-15 20:28:36,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:36,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:36,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:36,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:36,325 INFO L87 Difference]: Start difference. First operand 93 states and 235 transitions. Second operand 28 states. [2020-10-15 20:28:38,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:38,766 INFO L93 Difference]: Finished difference Result 148 states and 345 transitions. [2020-10-15 20:28:38,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:28:38,767 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:28:38,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:38,768 INFO L225 Difference]: With dead ends: 148 [2020-10-15 20:28:38,768 INFO L226 Difference]: Without dead ends: 142 [2020-10-15 20:28:38,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1078, Invalid=3082, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 20:28:38,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-15 20:28:38,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 92. [2020-10-15 20:28:38,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:28:38,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 233 transitions. [2020-10-15 20:28:38,771 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 233 transitions. Word has length 31 [2020-10-15 20:28:38,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:38,771 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 233 transitions. [2020-10-15 20:28:38,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 233 transitions. [2020-10-15 20:28:38,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:38,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:38,772 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:38,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-10-15 20:28:38,979 INFO L429 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:38,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:38,980 INFO L82 PathProgramCache]: Analyzing trace with hash -392653829, now seen corresponding path program 299 times [2020-10-15 20:28:38,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:38,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766409479] [2020-10-15 20:28:38,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:39,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766409479] [2020-10-15 20:28:39,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515673300] [2020-10-15 20:28:39,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:39,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 20:28:39,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:39,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:39,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:39,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:39,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:28:39,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240488675] [2020-10-15 20:28:39,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:28:39,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:39,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:28:39,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:28:39,762 INFO L87 Difference]: Start difference. First operand 92 states and 233 transitions. Second operand 27 states. [2020-10-15 20:28:42,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:42,029 INFO L93 Difference]: Finished difference Result 149 states and 349 transitions. [2020-10-15 20:28:42,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:28:42,031 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:28:42,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:42,032 INFO L225 Difference]: With dead ends: 149 [2020-10-15 20:28:42,032 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 20:28:42,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1168, Invalid=3122, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 20:28:42,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 20:28:42,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 95. [2020-10-15 20:28:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 20:28:42,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 241 transitions. [2020-10-15 20:28:42,035 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 241 transitions. Word has length 31 [2020-10-15 20:28:42,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:42,035 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 241 transitions. [2020-10-15 20:28:42,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:28:42,035 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 241 transitions. [2020-10-15 20:28:42,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:42,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:42,036 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:42,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-10-15 20:28:42,236 INFO L429 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:42,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:42,237 INFO L82 PathProgramCache]: Analyzing trace with hash 864235871, now seen corresponding path program 300 times [2020-10-15 20:28:42,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:42,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640614607] [2020-10-15 20:28:42,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:42,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640614607] [2020-10-15 20:28:42,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909511443] [2020-10-15 20:28:42,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:43,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 20:28:43,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:43,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:43,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:43,058 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:43,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:43,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:28:43,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745872034] [2020-10-15 20:28:43,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:43,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:43,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:43,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:43,092 INFO L87 Difference]: Start difference. First operand 95 states and 241 transitions. Second operand 28 states. [2020-10-15 20:28:45,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:45,784 INFO L93 Difference]: Finished difference Result 146 states and 343 transitions. [2020-10-15 20:28:45,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:28:45,787 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:28:45,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:45,788 INFO L225 Difference]: With dead ends: 146 [2020-10-15 20:28:45,788 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 20:28:45,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1175, Invalid=3247, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 20:28:45,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 20:28:45,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 94. [2020-10-15 20:28:45,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 20:28:45,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-10-15 20:28:45,790 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 31 [2020-10-15 20:28:45,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:45,790 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-10-15 20:28:45,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:45,790 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-10-15 20:28:45,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:45,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:45,791 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:45,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-10-15 20:28:45,991 INFO L429 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:45,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:45,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1814538915, now seen corresponding path program 301 times [2020-10-15 20:28:45,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:45,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249738161] [2020-10-15 20:28:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:46,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249738161] [2020-10-15 20:28:46,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545650020] [2020-10-15 20:28:46,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:46,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:46,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:46,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:46,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:28:46,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525941279] [2020-10-15 20:28:46,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:28:46,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:46,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:28:46,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:28:46,752 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 27 states. [2020-10-15 20:28:49,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:49,128 INFO L93 Difference]: Finished difference Result 147 states and 347 transitions. [2020-10-15 20:28:49,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 20:28:49,131 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:28:49,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:49,132 INFO L225 Difference]: With dead ends: 147 [2020-10-15 20:28:49,132 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 20:28:49,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1280, Invalid=3276, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 20:28:49,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 20:28:49,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 97. [2020-10-15 20:28:49,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 20:28:49,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 247 transitions. [2020-10-15 20:28:49,135 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 247 transitions. Word has length 31 [2020-10-15 20:28:49,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:49,135 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 247 transitions. [2020-10-15 20:28:49,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:28:49,135 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 247 transitions. [2020-10-15 20:28:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:49,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:49,136 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:49,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:49,337 INFO L429 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:49,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:49,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1294795839, now seen corresponding path program 302 times [2020-10-15 20:28:49,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:49,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888857955] [2020-10-15 20:28:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:50,005 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:50,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888857955] [2020-10-15 20:28:50,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465600527] [2020-10-15 20:28:50,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:50,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:28:50,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:50,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:50,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:50,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:50,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:50,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:28:50,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616896532] [2020-10-15 20:28:50,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:50,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:50,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:50,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:50,153 INFO L87 Difference]: Start difference. First operand 97 states and 247 transitions. Second operand 28 states. [2020-10-15 20:28:52,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:52,941 INFO L93 Difference]: Finished difference Result 144 states and 341 transitions. [2020-10-15 20:28:52,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 20:28:52,943 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:28:52,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:52,943 INFO L225 Difference]: With dead ends: 144 [2020-10-15 20:28:52,944 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 20:28:52,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1288, Invalid=3404, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 20:28:52,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 20:28:52,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 96. [2020-10-15 20:28:52,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 20:28:52,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 245 transitions. [2020-10-15 20:28:52,945 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 245 transitions. Word has length 31 [2020-10-15 20:28:52,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:52,946 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 245 transitions. [2020-10-15 20:28:52,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:28:52,946 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 245 transitions. [2020-10-15 20:28:52,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:52,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:52,946 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:53,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-10-15 20:28:53,147 INFO L429 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:53,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:53,148 INFO L82 PathProgramCache]: Analyzing trace with hash 360515391, now seen corresponding path program 303 times [2020-10-15 20:28:53,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:53,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083061859] [2020-10-15 20:28:53,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:53,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083061859] [2020-10-15 20:28:53,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560036418] [2020-10-15 20:28:53,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:53,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 20:28:53,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:53,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:53,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:53,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:53,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:28:53,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146582990] [2020-10-15 20:28:53,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:28:53,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:53,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:28:53,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:28:53,939 INFO L87 Difference]: Start difference. First operand 96 states and 245 transitions. Second operand 27 states. [2020-10-15 20:28:56,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:28:56,569 INFO L93 Difference]: Finished difference Result 145 states and 345 transitions. [2020-10-15 20:28:56,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 20:28:56,572 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:28:56,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:28:56,573 INFO L225 Difference]: With dead ends: 145 [2020-10-15 20:28:56,573 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 20:28:56,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1408, Invalid=3422, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 20:28:56,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 20:28:56,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 99. [2020-10-15 20:28:56,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:28:56,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-15 20:28:56,575 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 31 [2020-10-15 20:28:56,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:28:56,576 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-15 20:28:56,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:28:56,576 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-15 20:28:56,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:28:56,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:28:56,576 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:28:56,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:56,778 INFO L429 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:28:56,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:28:56,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1359612253, now seen corresponding path program 304 times [2020-10-15 20:28:56,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:28:56,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144932731] [2020-10-15 20:28:56,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:28:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:28:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:57,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144932731] [2020-10-15 20:28:57,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096833988] [2020-10-15 20:28:57,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:28:57,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:28:57,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:28:57,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:28:57,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:28:57,458 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:28:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:28:57,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:28:57,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:28:57,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107473096] [2020-10-15 20:28:57,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:28:57,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:28:57,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:28:57,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:28:57,490 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 28 states. [2020-10-15 20:29:00,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:00,072 INFO L93 Difference]: Finished difference Result 142 states and 339 transitions. [2020-10-15 20:29:00,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 20:29:00,074 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:29:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:00,074 INFO L225 Difference]: With dead ends: 142 [2020-10-15 20:29:00,074 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 20:29:00,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1417, Invalid=3553, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 20:29:00,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 20:29:00,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 98. [2020-10-15 20:29:00,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:29:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-15 20:29:00,081 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 31 [2020-10-15 20:29:00,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:00,081 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-15 20:29:00,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:29:00,081 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-15 20:29:00,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:29:00,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:00,082 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:00,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2020-10-15 20:29:00,282 INFO L429 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:00,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:00,283 INFO L82 PathProgramCache]: Analyzing trace with hash -888616543, now seen corresponding path program 305 times [2020-10-15 20:29:00,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:00,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277352360] [2020-10-15 20:29:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:00,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277352360] [2020-10-15 20:29:00,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285990026] [2020-10-15 20:29:00,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:00,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 20:29:00,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:00,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:29:00,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:00,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:00,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:29:00,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958317755] [2020-10-15 20:29:00,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:29:00,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:00,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:29:00,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:29:00,923 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 27 states. [2020-10-15 20:29:03,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:03,232 INFO L93 Difference]: Finished difference Result 143 states and 343 transitions. [2020-10-15 20:29:03,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 20:29:03,234 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:29:03,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:03,235 INFO L225 Difference]: With dead ends: 143 [2020-10-15 20:29:03,235 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 20:29:03,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1552, Invalid=3560, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 20:29:03,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 20:29:03,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 101. [2020-10-15 20:29:03,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 20:29:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 259 transitions. [2020-10-15 20:29:03,237 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 259 transitions. Word has length 31 [2020-10-15 20:29:03,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:03,237 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 259 transitions. [2020-10-15 20:29:03,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:29:03,238 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 259 transitions. [2020-10-15 20:29:03,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:29:03,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:03,238 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:03,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:03,439 INFO L429 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:03,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:03,439 INFO L82 PathProgramCache]: Analyzing trace with hash -872529403, now seen corresponding path program 306 times [2020-10-15 20:29:03,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:03,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760004587] [2020-10-15 20:29:03,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:04,017 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:04,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760004587] [2020-10-15 20:29:04,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931654406] [2020-10-15 20:29:04,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:04,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 20:29:04,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:04,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:29:04,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:04,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:29:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:04,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:04,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:29:04,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032266201] [2020-10-15 20:29:04,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:29:04,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:04,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:29:04,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:29:04,151 INFO L87 Difference]: Start difference. First operand 101 states and 259 transitions. Second operand 28 states. [2020-10-15 20:29:06,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:06,974 INFO L93 Difference]: Finished difference Result 140 states and 337 transitions. [2020-10-15 20:29:06,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 20:29:06,975 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:29:06,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:06,976 INFO L225 Difference]: With dead ends: 140 [2020-10-15 20:29:06,976 INFO L226 Difference]: Without dead ends: 134 [2020-10-15 20:29:06,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1562, Invalid=3694, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 20:29:06,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-15 20:29:06,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 100. [2020-10-15 20:29:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 20:29:06,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 257 transitions. [2020-10-15 20:29:06,978 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 257 transitions. Word has length 31 [2020-10-15 20:29:06,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:06,979 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 257 transitions. [2020-10-15 20:29:06,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:29:06,979 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 257 transitions. [2020-10-15 20:29:06,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:29:06,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:06,979 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:07,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:07,180 INFO L429 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:07,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:07,181 INFO L82 PathProgramCache]: Analyzing trace with hash -872039293, now seen corresponding path program 307 times [2020-10-15 20:29:07,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:07,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196940315] [2020-10-15 20:29:07,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:07,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196940315] [2020-10-15 20:29:07,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470977365] [2020-10-15 20:29:07,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:07,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:29:07,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:07,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:07,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-15 20:29:07,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198289507] [2020-10-15 20:29:07,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 20:29:07,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:07,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 20:29:07,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:29:07,897 INFO L87 Difference]: Start difference. First operand 100 states and 257 transitions. Second operand 27 states. [2020-10-15 20:29:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:10,472 INFO L93 Difference]: Finished difference Result 160 states and 387 transitions. [2020-10-15 20:29:10,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 20:29:10,474 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-15 20:29:10,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:10,475 INFO L225 Difference]: With dead ends: 160 [2020-10-15 20:29:10,475 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 20:29:10,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1712, Invalid=3690, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 20:29:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 20:29:10,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 106. [2020-10-15 20:29:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-15 20:29:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 277 transitions. [2020-10-15 20:29:10,478 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 277 transitions. Word has length 31 [2020-10-15 20:29:10,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:10,478 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 277 transitions. [2020-10-15 20:29:10,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 20:29:10,478 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 277 transitions. [2020-10-15 20:29:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 20:29:10,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:10,478 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:10,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2020-10-15 20:29:10,679 INFO L429 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:10,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:10,680 INFO L82 PathProgramCache]: Analyzing trace with hash -872022553, now seen corresponding path program 308 times [2020-10-15 20:29:10,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:10,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629541063] [2020-10-15 20:29:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:11,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629541063] [2020-10-15 20:29:11,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738073909] [2020-10-15 20:29:11,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:11,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:29:11,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:11,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-15 20:29:11,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:11,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:29:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:11,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:11,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-15 20:29:11,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715018743] [2020-10-15 20:29:11,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:29:11,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:11,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:29:11,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:29:11,480 INFO L87 Difference]: Start difference. First operand 106 states and 277 transitions. Second operand 28 states. [2020-10-15 20:29:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:14,548 INFO L93 Difference]: Finished difference Result 141 states and 343 transitions. [2020-10-15 20:29:14,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 20:29:14,550 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-15 20:29:14,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:14,550 INFO L225 Difference]: With dead ends: 141 [2020-10-15 20:29:14,550 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 20:29:14,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1723, Invalid=3827, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 20:29:14,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 20:29:14,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 103. [2020-10-15 20:29:14,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 20:29:14,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-10-15 20:29:14,552 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-10-15 20:29:14,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:14,552 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-10-15 20:29:14,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:29:14,553 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-10-15 20:29:14,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:14,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:14,553 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:14,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:14,754 INFO L429 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:14,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:14,754 INFO L82 PathProgramCache]: Analyzing trace with hash 470887608, now seen corresponding path program 309 times [2020-10-15 20:29:14,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:14,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507547701] [2020-10-15 20:29:14,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:15,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507547701] [2020-10-15 20:29:15,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469392405] [2020-10-15 20:29:15,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:15,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 20:29:15,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:15,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:15,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:15,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:15,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:29:15,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186041554] [2020-10-15 20:29:15,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:29:15,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:15,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:29:15,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:29:15,724 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 28 states. [2020-10-15 20:29:17,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:17,189 INFO L93 Difference]: Finished difference Result 164 states and 387 transitions. [2020-10-15 20:29:17,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:29:17,191 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:29:17,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:17,191 INFO L225 Difference]: With dead ends: 164 [2020-10-15 20:29:17,191 INFO L226 Difference]: Without dead ends: 158 [2020-10-15 20:29:17,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=841, Invalid=1915, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:29:17,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-15 20:29:17,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 105. [2020-10-15 20:29:17,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:29:17,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:29:17,194 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:29:17,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:17,194 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:29:17,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:29:17,194 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:29:17,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:17,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:17,195 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:17,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-10-15 20:29:17,395 INFO L429 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:17,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:17,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1353020644, now seen corresponding path program 310 times [2020-10-15 20:29:17,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:17,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039081229] [2020-10-15 20:29:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:18,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039081229] [2020-10-15 20:29:18,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220930880] [2020-10-15 20:29:18,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:18,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:29:18,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:18,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:18,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:18,407 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:29:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:18,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:18,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:29:18,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305445027] [2020-10-15 20:29:18,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:29:18,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:18,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:29:18,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:29:18,427 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:29:20,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:20,146 INFO L93 Difference]: Finished difference Result 161 states and 381 transitions. [2020-10-15 20:29:20,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:29:20,147 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:29:20,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:20,148 INFO L225 Difference]: With dead ends: 161 [2020-10-15 20:29:20,148 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 20:29:20,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=897, Invalid=2183, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:29:20,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 20:29:20,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 104. [2020-10-15 20:29:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:29:20,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:29:20,150 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:29:20,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:20,151 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:29:20,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:29:20,151 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:29:20,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:20,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:20,151 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:20,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-10-15 20:29:20,352 INFO L429 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:20,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:20,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2116672154, now seen corresponding path program 311 times [2020-10-15 20:29:20,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:20,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148513220] [2020-10-15 20:29:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:21,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148513220] [2020-10-15 20:29:21,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831629189] [2020-10-15 20:29:21,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:21,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 20:29:21,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:21,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:21,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:21,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:21,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:29:21,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407694269] [2020-10-15 20:29:21,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:29:21,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:21,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:29:21,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:29:21,249 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:29:22,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:22,800 INFO L93 Difference]: Finished difference Result 158 states and 375 transitions. [2020-10-15 20:29:22,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:29:22,802 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:29:22,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:22,803 INFO L225 Difference]: With dead ends: 158 [2020-10-15 20:29:22,803 INFO L226 Difference]: Without dead ends: 152 [2020-10-15 20:29:22,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=842, Invalid=2128, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:29:22,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-15 20:29:22,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 105. [2020-10-15 20:29:22,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:29:22,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:29:22,805 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:29:22,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:22,806 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:29:22,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:29:22,806 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:29:22,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:22,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:22,806 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:23,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-10-15 20:29:23,007 INFO L429 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:23,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:23,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1077903870, now seen corresponding path program 312 times [2020-10-15 20:29:23,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:23,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771038306] [2020-10-15 20:29:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:23,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771038306] [2020-10-15 20:29:23,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455090096] [2020-10-15 20:29:23,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:24,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 20:29:24,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:24,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:24,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:24,131 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:29:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:24,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:24,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:29:24,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465952578] [2020-10-15 20:29:24,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:29:24,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:24,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:29:24,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:29:24,155 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:29:26,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:26,095 INFO L93 Difference]: Finished difference Result 157 states and 373 transitions. [2020-10-15 20:29:26,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:29:26,097 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:29:26,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:26,097 INFO L225 Difference]: With dead ends: 157 [2020-10-15 20:29:26,097 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 20:29:26,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=905, Invalid=2401, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:29:26,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 20:29:26,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 104. [2020-10-15 20:29:26,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:29:26,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:29:26,100 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:29:26,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:26,100 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:29:26,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:29:26,100 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:29:26,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:26,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:26,101 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:26,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2020-10-15 20:29:26,301 INFO L429 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:26,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:26,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1492687100, now seen corresponding path program 313 times [2020-10-15 20:29:26,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:26,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299037178] [2020-10-15 20:29:26,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:27,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299037178] [2020-10-15 20:29:27,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240196954] [2020-10-15 20:29:27,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:27,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:27,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:27,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:27,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:29:27,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844052450] [2020-10-15 20:29:27,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:29:27,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:27,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:29:27,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:29:27,114 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:29:28,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:28,975 INFO L93 Difference]: Finished difference Result 154 states and 367 transitions. [2020-10-15 20:29:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:29:28,978 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:29:28,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:28,979 INFO L225 Difference]: With dead ends: 154 [2020-10-15 20:29:28,979 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 20:29:28,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=859, Invalid=2333, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:29:28,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 20:29:28,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 105. [2020-10-15 20:29:28,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:29:28,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:29:28,982 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:29:28,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:28,982 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:29:28,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:29:28,983 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:29:28,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:28,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:28,983 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:29,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:29,192 INFO L429 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:29,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:29,192 INFO L82 PathProgramCache]: Analyzing trace with hash -229062304, now seen corresponding path program 314 times [2020-10-15 20:29:29,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:29,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673111836] [2020-10-15 20:29:29,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:30,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673111836] [2020-10-15 20:29:30,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486578354] [2020-10-15 20:29:30,082 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 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:30,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:29:30,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:30,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:30,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:30,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:29:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:30,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:30,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:29:30,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454363912] [2020-10-15 20:29:30,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:29:30,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:30,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:29:30,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:29:30,225 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:29:32,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:32,376 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-10-15 20:29:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:29:32,378 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:29:32,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:32,378 INFO L225 Difference]: With dead ends: 153 [2020-10-15 20:29:32,378 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 20:29:32,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:29:32,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 20:29:32,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 104. [2020-10-15 20:29:32,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:29:32,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:29:32,381 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:29:32,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:32,381 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:29:32,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:29:32,381 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:29:32,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:32,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:32,381 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:32,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2020-10-15 20:29:32,582 INFO L429 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:32,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:32,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1412986914, now seen corresponding path program 315 times [2020-10-15 20:29:32,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:32,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428513911] [2020-10-15 20:29:32,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:32,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:33,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428513911] [2020-10-15 20:29:33,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176201674] [2020-10-15 20:29:33,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:33,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 20:29:33,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:33,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:33,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:33,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:33,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:29:33,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306005443] [2020-10-15 20:29:33,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:29:33,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:33,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:29:33,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:29:33,420 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:29:35,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:35,277 INFO L93 Difference]: Finished difference Result 150 states and 359 transitions. [2020-10-15 20:29:35,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:29:35,280 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:29:35,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:35,281 INFO L225 Difference]: With dead ends: 150 [2020-10-15 20:29:35,281 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 20:29:35,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 20:29:35,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 20:29:35,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 105. [2020-10-15 20:29:35,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:29:35,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:29:35,284 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:29:35,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:35,284 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:29:35,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:29:35,285 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:29:35,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:35,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:35,285 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:35,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2020-10-15 20:29:35,486 INFO L429 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:35,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:35,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1333821762, now seen corresponding path program 316 times [2020-10-15 20:29:35,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:35,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127212316] [2020-10-15 20:29:35,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:36,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127212316] [2020-10-15 20:29:36,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148151935] [2020-10-15 20:29:36,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:36,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:29:36,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:36,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:36,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:36,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:29:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:36,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:36,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:29:36,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360681585] [2020-10-15 20:29:36,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:29:36,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:36,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:29:36,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:29:36,453 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:29:38,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:38,536 INFO L93 Difference]: Finished difference Result 149 states and 357 transitions. [2020-10-15 20:29:38,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:29:38,538 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:29:38,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:38,539 INFO L225 Difference]: With dead ends: 149 [2020-10-15 20:29:38,539 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 20:29:38,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=969, Invalid=2813, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 20:29:38,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 20:29:38,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2020-10-15 20:29:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:29:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:29:38,542 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:29:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:38,542 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:29:38,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:29:38,542 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:29:38,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:38,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:38,542 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:38,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2020-10-15 20:29:38,743 INFO L429 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:38,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:38,744 INFO L82 PathProgramCache]: Analyzing trace with hash 32032576, now seen corresponding path program 317 times [2020-10-15 20:29:38,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:38,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158708045] [2020-10-15 20:29:38,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:39,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158708045] [2020-10-15 20:29:39,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891770904] [2020-10-15 20:29:39,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:39,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 20:29:39,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:39,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:39,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:39,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:39,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:29:39,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856764643] [2020-10-15 20:29:39,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:29:39,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:39,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:29:39,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:29:39,565 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:29:41,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:41,345 INFO L93 Difference]: Finished difference Result 146 states and 351 transitions. [2020-10-15 20:29:41,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:29:41,347 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:29:41,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:41,348 INFO L225 Difference]: With dead ends: 146 [2020-10-15 20:29:41,348 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 20:29:41,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=941, Invalid=2719, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:29:41,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 20:29:41,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 105. [2020-10-15 20:29:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:29:41,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:29:41,350 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:29:41,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:41,350 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:29:41,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:29:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:29:41,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:41,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:41,351 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:41,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:41,552 INFO L429 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:41,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:41,552 INFO L82 PathProgramCache]: Analyzing trace with hash -778516060, now seen corresponding path program 318 times [2020-10-15 20:29:41,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:41,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351636474] [2020-10-15 20:29:41,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:42,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351636474] [2020-10-15 20:29:42,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132052527] [2020-10-15 20:29:42,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:42,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 20:29:42,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:42,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:42,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:42,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:29:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:42,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:42,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:29:42,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929379395] [2020-10-15 20:29:42,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:29:42,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:42,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:29:42,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:29:42,401 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:29:44,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:44,701 INFO L93 Difference]: Finished difference Result 145 states and 349 transitions. [2020-10-15 20:29:44,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:29:44,702 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:29:44,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:44,703 INFO L225 Difference]: With dead ends: 145 [2020-10-15 20:29:44,703 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 20:29:44,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 20:29:44,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 20:29:44,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 104. [2020-10-15 20:29:44,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:29:44,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:29:44,706 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:29:44,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:44,706 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:29:44,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:29:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:29:44,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:44,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:44,706 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:44,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:44,907 INFO L429 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:44,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:44,907 INFO L82 PathProgramCache]: Analyzing trace with hash -726239454, now seen corresponding path program 319 times [2020-10-15 20:29:44,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:44,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805755330] [2020-10-15 20:29:44,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:45,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805755330] [2020-10-15 20:29:45,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601818153] [2020-10-15 20:29:45,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:45,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:45,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:45,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:45,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:29:45,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912596379] [2020-10-15 20:29:45,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:29:45,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:45,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:29:45,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:29:45,638 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:29:47,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:47,528 INFO L93 Difference]: Finished difference Result 142 states and 343 transitions. [2020-10-15 20:29:47,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:29:47,529 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:29:47,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:47,530 INFO L225 Difference]: With dead ends: 142 [2020-10-15 20:29:47,530 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 20:29:47,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1006, Invalid=2900, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:29:47,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 20:29:47,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 105. [2020-10-15 20:29:47,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:29:47,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:29:47,533 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:29:47,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:47,533 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:29:47,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:29:47,534 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:29:47,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:47,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:47,534 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:47,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2020-10-15 20:29:47,735 INFO L429 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:47,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:47,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1150009990, now seen corresponding path program 320 times [2020-10-15 20:29:47,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:47,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589496095] [2020-10-15 20:29:47,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:48,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589496095] [2020-10-15 20:29:48,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505123861] [2020-10-15 20:29:48,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:48,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:29:48,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:48,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:48,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:48,578 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:29:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:48,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:48,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:29:48,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890000072] [2020-10-15 20:29:48,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:29:48,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:48,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:29:48,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:29:48,606 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:29:51,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:51,171 INFO L93 Difference]: Finished difference Result 141 states and 341 transitions. [2020-10-15 20:29:51,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:29:51,174 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:29:51,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:51,175 INFO L225 Difference]: With dead ends: 141 [2020-10-15 20:29:51,175 INFO L226 Difference]: Without dead ends: 135 [2020-10-15 20:29:51,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1097, Invalid=3193, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 20:29:51,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-15 20:29:51,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2020-10-15 20:29:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:29:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:29:51,178 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:29:51,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:51,178 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:29:51,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:29:51,178 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:29:51,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:51,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:51,179 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:51,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2020-10-15 20:29:51,379 INFO L429 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:51,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:51,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1838331780, now seen corresponding path program 321 times [2020-10-15 20:29:51,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:51,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495902349] [2020-10-15 20:29:51,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:52,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495902349] [2020-10-15 20:29:52,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843746105] [2020-10-15 20:29:52,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:52,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 20:29:52,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:52,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:52,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:52,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:52,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:29:52,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375266615] [2020-10-15 20:29:52,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:29:52,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:52,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:29:52,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:29:52,192 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:29:54,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:54,530 INFO L93 Difference]: Finished difference Result 138 states and 335 transitions. [2020-10-15 20:29:54,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 20:29:54,533 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:29:54,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:54,534 INFO L225 Difference]: With dead ends: 138 [2020-10-15 20:29:54,534 INFO L226 Difference]: Without dead ends: 132 [2020-10-15 20:29:54,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1087, Invalid=3073, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 20:29:54,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-15 20:29:54,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 105. [2020-10-15 20:29:54,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:29:54,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:29:54,536 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:29:54,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:54,537 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:29:54,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:29:54,537 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:29:54,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:54,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:54,537 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:54,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2020-10-15 20:29:54,738 INFO L429 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:54,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:54,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1471443992, now seen corresponding path program 322 times [2020-10-15 20:29:54,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:54,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114957148] [2020-10-15 20:29:54,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:55,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114957148] [2020-10-15 20:29:55,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111600117] [2020-10-15 20:29:55,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:55,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:29:55,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:55,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:55,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:55,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:29:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:55,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:55,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:29:55,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116435897] [2020-10-15 20:29:55,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:29:55,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:55,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:29:55,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:29:55,760 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:29:58,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:29:58,548 INFO L93 Difference]: Finished difference Result 137 states and 333 transitions. [2020-10-15 20:29:58,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:29:58,549 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:29:58,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:29:58,550 INFO L225 Difference]: With dead ends: 137 [2020-10-15 20:29:58,550 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 20:29:58,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1185, Invalid=3371, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 20:29:58,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 20:29:58,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 104. [2020-10-15 20:29:58,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:29:58,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:29:58,552 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:29:58,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:29:58,552 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:29:58,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:29:58,553 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:29:58,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:29:58,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:29:58,553 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:29:58,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2020-10-15 20:29:58,754 INFO L429 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:29:58,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:29:58,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1206364262, now seen corresponding path program 323 times [2020-10-15 20:29:58,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:29:58,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062173349] [2020-10-15 20:29:58,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:29:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:29:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:59,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062173349] [2020-10-15 20:29:59,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233924248] [2020-10-15 20:29:59,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:29:59,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 20:29:59,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:29:59,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:29:59,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:29:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:29:59,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:29:59,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:29:59,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422409006] [2020-10-15 20:29:59,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:29:59,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:29:59,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:29:59,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:29:59,547 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:30:02,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:02,317 INFO L93 Difference]: Finished difference Result 134 states and 327 transitions. [2020-10-15 20:30:02,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:30:02,320 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:30:02,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:02,320 INFO L225 Difference]: With dead ends: 134 [2020-10-15 20:30:02,320 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 20:30:02,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1184, Invalid=3238, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 20:30:02,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 20:30:02,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2020-10-15 20:30:02,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:30:02,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:30:02,323 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:30:02,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:02,323 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:30:02,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:30:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:30:02,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:30:02,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:02,323 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:02,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:02,524 INFO L429 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:02,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:02,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1831713334, now seen corresponding path program 324 times [2020-10-15 20:30:02,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:02,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331964794] [2020-10-15 20:30:02,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:03,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331964794] [2020-10-15 20:30:03,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786286309] [2020-10-15 20:30:03,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:03,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 20:30:03,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:03,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:30:03,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:03,450 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:30:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:03,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:03,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:30:03,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999907827] [2020-10-15 20:30:03,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:30:03,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:03,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:30:03,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:30:03,486 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:30:06,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:06,769 INFO L93 Difference]: Finished difference Result 133 states and 325 transitions. [2020-10-15 20:30:06,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 20:30:06,771 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:30:06,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:06,772 INFO L225 Difference]: With dead ends: 133 [2020-10-15 20:30:06,772 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 20:30:06,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1289, Invalid=3541, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 20:30:06,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 20:30:06,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2020-10-15 20:30:06,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:30:06,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:30:06,774 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:30:06,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:06,774 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:30:06,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:30:06,774 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:30:06,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:30:06,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:06,775 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:06,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2020-10-15 20:30:06,975 INFO L429 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:06,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:06,976 INFO L82 PathProgramCache]: Analyzing trace with hash -215520824, now seen corresponding path program 325 times [2020-10-15 20:30:06,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:06,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557242395] [2020-10-15 20:30:06,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:07,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557242395] [2020-10-15 20:30:07,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921311815] [2020-10-15 20:30:07,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:07,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:30:07,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:07,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:07,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:30:07,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217568538] [2020-10-15 20:30:07,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:30:07,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:07,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:30:07,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:30:07,926 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:30:10,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:10,881 INFO L93 Difference]: Finished difference Result 130 states and 319 transitions. [2020-10-15 20:30:10,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 20:30:10,883 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:30:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:10,884 INFO L225 Difference]: With dead ends: 130 [2020-10-15 20:30:10,884 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 20:30:10,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1297, Invalid=3395, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 20:30:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 20:30:10,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2020-10-15 20:30:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:30:10,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:30:10,887 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:30:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:10,887 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:30:10,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:30:10,887 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:30:10,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:30:10,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:10,887 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:11,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:11,088 INFO L429 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:11,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:11,088 INFO L82 PathProgramCache]: Analyzing trace with hash 304222252, now seen corresponding path program 326 times [2020-10-15 20:30:11,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:11,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802346852] [2020-10-15 20:30:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:11,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802346852] [2020-10-15 20:30:11,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743009538] [2020-10-15 20:30:11,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:11,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:30:11,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:11,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:30:11,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:11,923 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:30:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:11,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:11,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:30:11,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950452436] [2020-10-15 20:30:11,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:30:11,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:11,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:30:11,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:30:11,956 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:30:15,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:15,090 INFO L93 Difference]: Finished difference Result 129 states and 317 transitions. [2020-10-15 20:30:15,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 20:30:15,092 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:30:15,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:15,092 INFO L225 Difference]: With dead ends: 129 [2020-10-15 20:30:15,092 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 20:30:15,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1409, Invalid=3703, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 20:30:15,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 20:30:15,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2020-10-15 20:30:15,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:30:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:30:15,095 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:30:15,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:15,095 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:30:15,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:30:15,095 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:30:15,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:30:15,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:15,095 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:15,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2020-10-15 20:30:15,296 INFO L429 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:15,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:15,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1959533482, now seen corresponding path program 327 times [2020-10-15 20:30:15,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:15,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110085070] [2020-10-15 20:30:15,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:15,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110085070] [2020-10-15 20:30:15,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989993818] [2020-10-15 20:30:15,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:16,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 20:30:16,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:16,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:30:16,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:16,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:16,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:30:16,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681151652] [2020-10-15 20:30:16,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:30:16,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:16,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:30:16,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:30:16,108 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:30:18,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:18,966 INFO L93 Difference]: Finished difference Result 126 states and 311 transitions. [2020-10-15 20:30:18,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 20:30:18,970 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:30:18,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:18,970 INFO L225 Difference]: With dead ends: 126 [2020-10-15 20:30:18,970 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 20:30:18,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1426, Invalid=3544, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 20:30:18,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 20:30:18,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 105. [2020-10-15 20:30:18,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:30:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:30:18,973 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:30:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:18,973 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:30:18,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:30:18,974 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:30:18,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:30:18,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:18,974 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:19,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:19,175 INFO L429 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:19,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:19,175 INFO L82 PathProgramCache]: Analyzing trace with hash 239405838, now seen corresponding path program 328 times [2020-10-15 20:30:19,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:19,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292223908] [2020-10-15 20:30:19,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:20,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292223908] [2020-10-15 20:30:20,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159057906] [2020-10-15 20:30:20,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:20,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:30:20,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:20,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:30:20,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:20,187 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:30:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:20,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:20,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:30:20,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015518416] [2020-10-15 20:30:20,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:30:20,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:20,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:30:20,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:30:20,235 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:30:24,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:24,202 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-10-15 20:30:24,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 20:30:24,204 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:30:24,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:24,209 INFO L225 Difference]: With dead ends: 125 [2020-10-15 20:30:24,210 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 20:30:24,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1545, Invalid=3857, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 20:30:24,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 20:30:24,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2020-10-15 20:30:24,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:30:24,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:30:24,211 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:30:24,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:24,212 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:30:24,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:30:24,212 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:30:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:30:24,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:24,212 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:24,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2020-10-15 20:30:24,413 INFO L429 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:24,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:24,413 INFO L82 PathProgramCache]: Analyzing trace with hash 710401548, now seen corresponding path program 329 times [2020-10-15 20:30:24,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:24,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728024869] [2020-10-15 20:30:24,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:25,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728024869] [2020-10-15 20:30:25,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848556014] [2020-10-15 20:30:25,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:25,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-15 20:30:25,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:25,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:30:25,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:25,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:25,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:30:25,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110009029] [2020-10-15 20:30:25,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:30:25,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:25,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:30:25,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:30:25,250 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:30:28,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:28,647 INFO L93 Difference]: Finished difference Result 122 states and 303 transitions. [2020-10-15 20:30:28,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 20:30:28,650 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:30:28,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:28,650 INFO L225 Difference]: With dead ends: 122 [2020-10-15 20:30:28,650 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 20:30:28,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1571, Invalid=3685, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 20:30:28,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 20:30:28,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2020-10-15 20:30:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:30:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:30:28,653 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-15 20:30:28,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:28,653 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:30:28,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:30:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:30:28,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:30:28,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:28,654 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:28,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:28,855 INFO L429 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:28,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:28,855 INFO L82 PathProgramCache]: Analyzing trace with hash 726488688, now seen corresponding path program 330 times [2020-10-15 20:30:28,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:28,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846559318] [2020-10-15 20:30:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:29,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846559318] [2020-10-15 20:30:29,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791480160] [2020-10-15 20:30:29,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:29,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-15 20:30:29,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:29,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:30:29,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:29,833 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:30:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:29,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:29,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:30:29,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093554689] [2020-10-15 20:30:29,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:30:29,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:29,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:30:29,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:30:29,880 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-15 20:30:33,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:33,634 INFO L93 Difference]: Finished difference Result 121 states and 301 transitions. [2020-10-15 20:30:33,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 20:30:33,636 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:30:33,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:33,636 INFO L225 Difference]: With dead ends: 121 [2020-10-15 20:30:33,637 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 20:30:33,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1697, Invalid=4003, Unknown=0, NotChecked=0, Total=5700 [2020-10-15 20:30:33,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 20:30:33,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-10-15 20:30:33,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:30:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:30:33,639 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-15 20:30:33,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:33,640 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:30:33,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:30:33,640 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:30:33,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:30:33,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:33,640 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:33,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:33,841 INFO L429 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:33,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:33,842 INFO L82 PathProgramCache]: Analyzing trace with hash 726978798, now seen corresponding path program 331 times [2020-10-15 20:30:33,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:33,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786592214] [2020-10-15 20:30:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:34,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786592214] [2020-10-15 20:30:34,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277363409] [2020-10-15 20:30:34,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:34,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:30:34,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:34,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:34,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-15 20:30:34,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383017167] [2020-10-15 20:30:34,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 20:30:34,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:34,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 20:30:34,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:30:34,650 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-15 20:30:37,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:37,579 INFO L93 Difference]: Finished difference Result 137 states and 341 transitions. [2020-10-15 20:30:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 20:30:37,581 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-15 20:30:37,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:37,582 INFO L225 Difference]: With dead ends: 137 [2020-10-15 20:30:37,582 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 20:30:37,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1732, Invalid=3818, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 20:30:37,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 20:30:37,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 108. [2020-10-15 20:30:37,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-15 20:30:37,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 281 transitions. [2020-10-15 20:30:37,585 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 281 transitions. Word has length 32 [2020-10-15 20:30:37,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:37,585 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 281 transitions. [2020-10-15 20:30:37,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 20:30:37,585 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 281 transitions. [2020-10-15 20:30:37,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:30:37,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:37,586 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:37,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2020-10-15 20:30:37,786 INFO L429 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:37,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:37,787 INFO L82 PathProgramCache]: Analyzing trace with hash 726995538, now seen corresponding path program 332 times [2020-10-15 20:30:37,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:37,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643019007] [2020-10-15 20:30:37,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:38,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643019007] [2020-10-15 20:30:38,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930877646] [2020-10-15 20:30:38,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:38,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:30:38,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:38,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:30:38,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:38,591 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:30:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:38,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:38,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:30:38,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021006251] [2020-10-15 20:30:38,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:30:38,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:38,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:30:38,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:30:38,634 INFO L87 Difference]: Start difference. First operand 108 states and 281 transitions. Second operand 29 states. [2020-10-15 20:30:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:42,389 INFO L93 Difference]: Finished difference Result 118 states and 297 transitions. [2020-10-15 20:30:42,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-15 20:30:42,391 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:30:42,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:42,392 INFO L225 Difference]: With dead ends: 118 [2020-10-15 20:30:42,398 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 20:30:42,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1865, Invalid=4141, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 20:30:42,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 20:30:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 77. [2020-10-15 20:30:42,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 20:30:42,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 188 transitions. [2020-10-15 20:30:42,400 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 188 transitions. Word has length 32 [2020-10-15 20:30:42,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:42,400 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 188 transitions. [2020-10-15 20:30:42,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:30:42,400 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 188 transitions. [2020-10-15 20:30:42,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 20:30:42,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:42,400 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:42,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2020-10-15 20:30:42,601 INFO L429 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:42,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:42,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1262879060, now seen corresponding path program 333 times [2020-10-15 20:30:42,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:42,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850811858] [2020-10-15 20:30:42,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:43,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850811858] [2020-10-15 20:30:43,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310818474] [2020-10-15 20:30:43,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:43,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-15 20:30:43,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:43,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-15 20:30:43,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:43,475 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:30:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:43,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:43,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-15 20:30:43,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943381466] [2020-10-15 20:30:43,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:30:43,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:43,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:30:43,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:30:43,538 INFO L87 Difference]: Start difference. First operand 77 states and 188 transitions. Second operand 29 states. [2020-10-15 20:30:47,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:47,241 INFO L93 Difference]: Finished difference Result 140 states and 343 transitions. [2020-10-15 20:30:47,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 20:30:47,243 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-15 20:30:47,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:47,244 INFO L225 Difference]: With dead ends: 140 [2020-10-15 20:30:47,244 INFO L226 Difference]: Without dead ends: 135 [2020-10-15 20:30:47,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1930, Invalid=4076, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 20:30:47,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-15 20:30:47,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2020-10-15 20:30:47,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-15 20:30:47,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2020-10-15 20:30:47,247 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 32 [2020-10-15 20:30:47,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:47,247 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2020-10-15 20:30:47,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:30:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2020-10-15 20:30:47,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:47,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:47,247 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:47,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2020-10-15 20:30:47,448 INFO L429 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:47,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:47,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1062041505, now seen corresponding path program 334 times [2020-10-15 20:30:47,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:47,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181369494] [2020-10-15 20:30:47,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:48,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181369494] [2020-10-15 20:30:48,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251466721] [2020-10-15 20:30:48,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:48,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:30:48,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:48,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:48,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:48,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:30:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:48,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:48,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:30:48,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122416612] [2020-10-15 20:30:48,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:30:48,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:48,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:30:48,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:30:48,376 INFO L87 Difference]: Start difference. First operand 106 states and 273 transitions. Second operand 30 states. [2020-10-15 20:30:52,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:52,393 INFO L93 Difference]: Finished difference Result 114 states and 293 transitions. [2020-10-15 20:30:52,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 20:30:52,396 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:30:52,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:52,396 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:30:52,396 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 20:30:52,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1951, Invalid=4211, Unknown=0, NotChecked=0, Total=6162 [2020-10-15 20:30:52,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 20:30:52,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 78. [2020-10-15 20:30:52,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 20:30:52,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2020-10-15 20:30:52,398 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 33 [2020-10-15 20:30:52,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:52,398 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2020-10-15 20:30:52,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:30:52,398 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2020-10-15 20:30:52,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:52,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:52,399 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:52,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:52,599 INFO L429 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:52,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:52,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1801619636, now seen corresponding path program 335 times [2020-10-15 20:30:52,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:52,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647906689] [2020-10-15 20:30:52,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:53,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647906689] [2020-10-15 20:30:53,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033766912] [2020-10-15 20:30:53,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:53,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 20:30:53,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:53,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:53,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:53,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:53,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:30:53,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61239368] [2020-10-15 20:30:53,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:30:53,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:53,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:30:53,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:30:53,818 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand 29 states. [2020-10-15 20:30:55,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:55,572 INFO L93 Difference]: Finished difference Result 120 states and 279 transitions. [2020-10-15 20:30:55,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:30:55,575 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:30:55,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:55,575 INFO L225 Difference]: With dead ends: 120 [2020-10-15 20:30:55,575 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 20:30:55,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=913, Invalid=1949, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:30:55,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 20:30:55,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2020-10-15 20:30:55,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:30:55,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 211 transitions. [2020-10-15 20:30:55,577 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 211 transitions. Word has length 33 [2020-10-15 20:30:55,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:55,578 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 211 transitions. [2020-10-15 20:30:55,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:30:55,578 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 211 transitions. [2020-10-15 20:30:55,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:55,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:55,578 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:55,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2020-10-15 20:30:55,779 INFO L429 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:55,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:55,779 INFO L82 PathProgramCache]: Analyzing trace with hash 2064174256, now seen corresponding path program 336 times [2020-10-15 20:30:55,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:55,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935893212] [2020-10-15 20:30:55,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:30:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:56,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935893212] [2020-10-15 20:30:56,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193248010] [2020-10-15 20:30:56,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:56,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 20:30:56,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:30:56,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:30:56,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:30:56,934 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:30:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:30:56,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:30:56,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:30:56,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355546716] [2020-10-15 20:30:56,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:30:56,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:30:56,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:30:56,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:30:56,953 INFO L87 Difference]: Start difference. First operand 86 states and 211 transitions. Second operand 30 states. [2020-10-15 20:30:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:30:58,777 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-10-15 20:30:58,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:30:58,779 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:30:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:30:58,780 INFO L225 Difference]: With dead ends: 146 [2020-10-15 20:30:58,780 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 20:30:58,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=922, Invalid=2158, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:30:58,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 20:30:58,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2020-10-15 20:30:58,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 20:30:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 207 transitions. [2020-10-15 20:30:58,783 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 207 transitions. Word has length 33 [2020-10-15 20:30:58,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:30:58,783 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 207 transitions. [2020-10-15 20:30:58,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:30:58,783 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 207 transitions. [2020-10-15 20:30:58,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:30:58,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:30:58,783 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:30:58,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:30:58,984 INFO L429 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:30:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:30:58,985 INFO L82 PathProgramCache]: Analyzing trace with hash -750635858, now seen corresponding path program 337 times [2020-10-15 20:30:58,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:30:58,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708679137] [2020-10-15 20:30:58,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:30:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:00,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708679137] [2020-10-15 20:31:00,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418790321] [2020-10-15 20:31:00,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:00,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:31:00,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:00,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:00,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:31:00,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502168071] [2020-10-15 20:31:00,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:31:00,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:00,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:31:00,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:31:00,146 INFO L87 Difference]: Start difference. First operand 84 states and 207 transitions. Second operand 29 states. [2020-10-15 20:31:02,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:02,099 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-10-15 20:31:02,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:31:02,102 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:31:02,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:02,103 INFO L225 Difference]: With dead ends: 147 [2020-10-15 20:31:02,103 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 20:31:02,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=922, Invalid=2270, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:31:02,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 20:31:02,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 87. [2020-10-15 20:31:02,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:31:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 215 transitions. [2020-10-15 20:31:02,106 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 215 transitions. Word has length 33 [2020-10-15 20:31:02,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:02,107 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 215 transitions. [2020-10-15 20:31:02,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:31:02,107 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 215 transitions. [2020-10-15 20:31:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:31:02,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:02,107 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:02,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2020-10-15 20:31:02,318 INFO L429 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:02,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:02,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1720423186, now seen corresponding path program 338 times [2020-10-15 20:31:02,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:02,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471403168] [2020-10-15 20:31:02,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:03,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471403168] [2020-10-15 20:31:03,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398280948] [2020-10-15 20:31:03,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:03,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:31:03,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:03,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:31:03,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:03,537 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:31:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:03,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:03,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:31:03,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380463384] [2020-10-15 20:31:03,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:31:03,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:03,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:31:03,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:31:03,567 INFO L87 Difference]: Start difference. First operand 87 states and 215 transitions. Second operand 30 states. [2020-10-15 20:31:05,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:05,786 INFO L93 Difference]: Finished difference Result 169 states and 379 transitions. [2020-10-15 20:31:05,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:31:05,789 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:31:05,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:05,790 INFO L225 Difference]: With dead ends: 169 [2020-10-15 20:31:05,790 INFO L226 Difference]: Without dead ends: 163 [2020-10-15 20:31:05,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=964, Invalid=2458, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 20:31:05,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-15 20:31:05,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 86. [2020-10-15 20:31:05,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:31:05,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 213 transitions. [2020-10-15 20:31:05,793 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 213 transitions. Word has length 33 [2020-10-15 20:31:05,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:05,797 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 213 transitions. [2020-10-15 20:31:05,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:31:05,797 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 213 transitions. [2020-10-15 20:31:05,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:31:05,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:05,798 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:05,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:05,998 INFO L429 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:05,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:05,999 INFO L82 PathProgramCache]: Analyzing trace with hash 895148688, now seen corresponding path program 339 times [2020-10-15 20:31:05,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:05,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301596164] [2020-10-15 20:31:06,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:06,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301596164] [2020-10-15 20:31:06,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183698872] [2020-10-15 20:31:06,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:06,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 20:31:06,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:06,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:31:06,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:07,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:07,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:31:07,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241636287] [2020-10-15 20:31:07,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:31:07,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:07,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:31:07,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:31:07,007 INFO L87 Difference]: Start difference. First operand 86 states and 213 transitions. Second operand 29 states. [2020-10-15 20:31:08,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:08,947 INFO L93 Difference]: Finished difference Result 169 states and 381 transitions. [2020-10-15 20:31:08,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:31:08,950 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:31:08,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:08,950 INFO L225 Difference]: With dead ends: 169 [2020-10-15 20:31:08,950 INFO L226 Difference]: Without dead ends: 163 [2020-10-15 20:31:08,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=978, Invalid=2562, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:31:08,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-15 20:31:08,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 89. [2020-10-15 20:31:08,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 20:31:08,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 221 transitions. [2020-10-15 20:31:08,953 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 221 transitions. Word has length 33 [2020-10-15 20:31:08,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:08,953 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 221 transitions. [2020-10-15 20:31:08,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:31:08,953 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 221 transitions. [2020-10-15 20:31:08,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:31:08,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:08,953 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:09,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:09,154 INFO L429 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:09,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:09,155 INFO L82 PathProgramCache]: Analyzing trace with hash -143619596, now seen corresponding path program 340 times [2020-10-15 20:31:09,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:09,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832072900] [2020-10-15 20:31:09,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:10,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832072900] [2020-10-15 20:31:10,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427696839] [2020-10-15 20:31:10,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:10,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:31:10,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:10,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:31:10,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:10,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:31:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:10,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:10,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:31:10,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862727378] [2020-10-15 20:31:10,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:31:10,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:10,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:31:10,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:31:10,407 INFO L87 Difference]: Start difference. First operand 89 states and 221 transitions. Second operand 30 states. [2020-10-15 20:31:12,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:12,759 INFO L93 Difference]: Finished difference Result 166 states and 375 transitions. [2020-10-15 20:31:12,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:31:12,761 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:31:12,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:12,762 INFO L225 Difference]: With dead ends: 166 [2020-10-15 20:31:12,762 INFO L226 Difference]: Without dead ends: 160 [2020-10-15 20:31:12,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=979, Invalid=2681, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:31:12,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-15 20:31:12,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 88. [2020-10-15 20:31:12,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 20:31:12,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 219 transitions. [2020-10-15 20:31:12,764 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 219 transitions. Word has length 33 [2020-10-15 20:31:12,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:12,764 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 219 transitions. [2020-10-15 20:31:12,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:31:12,764 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 219 transitions. [2020-10-15 20:31:12,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:31:12,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:12,765 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:12,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable341 [2020-10-15 20:31:12,966 INFO L429 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:12,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:12,966 INFO L82 PathProgramCache]: Analyzing trace with hash 271163634, now seen corresponding path program 341 times [2020-10-15 20:31:12,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:12,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067844802] [2020-10-15 20:31:12,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:14,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067844802] [2020-10-15 20:31:14,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621263221] [2020-10-15 20:31:14,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:14,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 20:31:14,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:14,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:31:14,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:14,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:14,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:31:14,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112925191] [2020-10-15 20:31:14,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:31:14,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:14,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:31:14,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:31:14,134 INFO L87 Difference]: Start difference. First operand 88 states and 219 transitions. Second operand 29 states. [2020-10-15 20:31:16,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:16,466 INFO L93 Difference]: Finished difference Result 167 states and 379 transitions. [2020-10-15 20:31:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:31:16,471 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:31:16,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:16,471 INFO L225 Difference]: With dead ends: 167 [2020-10-15 20:31:16,471 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 20:31:16,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1008, Invalid=2774, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 20:31:16,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 20:31:16,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 91. [2020-10-15 20:31:16,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 20:31:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 227 transitions. [2020-10-15 20:31:16,474 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 227 transitions. Word has length 33 [2020-10-15 20:31:16,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:16,474 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 227 transitions. [2020-10-15 20:31:16,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:31:16,475 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 227 transitions. [2020-10-15 20:31:16,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:31:16,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:16,475 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:16,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2020-10-15 20:31:16,676 INFO L429 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:16,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:16,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1450585770, now seen corresponding path program 342 times [2020-10-15 20:31:16,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:16,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113325177] [2020-10-15 20:31:16,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:17,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113325177] [2020-10-15 20:31:17,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002446196] [2020-10-15 20:31:17,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:17,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 20:31:17,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:17,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:31:17,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:17,821 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:31:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:17,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:17,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:31:17,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082794438] [2020-10-15 20:31:17,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:31:17,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:17,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:31:17,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:31:17,849 INFO L87 Difference]: Start difference. First operand 91 states and 227 transitions. Second operand 30 states. [2020-10-15 20:31:20,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:20,351 INFO L93 Difference]: Finished difference Result 164 states and 373 transitions. [2020-10-15 20:31:20,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:31:20,353 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:31:20,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:20,353 INFO L225 Difference]: With dead ends: 164 [2020-10-15 20:31:20,353 INFO L226 Difference]: Without dead ends: 158 [2020-10-15 20:31:20,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1010, Invalid=2896, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:31:20,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-15 20:31:20,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2020-10-15 20:31:20,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 20:31:20,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 225 transitions. [2020-10-15 20:31:20,356 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 225 transitions. Word has length 33 [2020-10-15 20:31:20,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:20,356 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 225 transitions. [2020-10-15 20:31:20,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:31:20,356 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 225 transitions. [2020-10-15 20:31:20,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:31:20,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:20,357 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:20,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2020-10-15 20:31:20,558 INFO L429 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:20,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:20,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1660456916, now seen corresponding path program 343 times [2020-10-15 20:31:20,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:20,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90938225] [2020-10-15 20:31:20,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:21,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90938225] [2020-10-15 20:31:21,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911683865] [2020-10-15 20:31:21,561 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 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:21,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:31:21,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:21,649 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:21,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:21,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:31:21,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172624213] [2020-10-15 20:31:21,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:31:21,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:21,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:31:21,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:31:21,650 INFO L87 Difference]: Start difference. First operand 90 states and 225 transitions. Second operand 29 states. [2020-10-15 20:31:24,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:24,064 INFO L93 Difference]: Finished difference Result 165 states and 377 transitions. [2020-10-15 20:31:24,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:31:24,067 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:31:24,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:24,067 INFO L225 Difference]: With dead ends: 165 [2020-10-15 20:31:24,068 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 20:31:24,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1054, Invalid=2978, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 20:31:24,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 20:31:24,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 93. [2020-10-15 20:31:24,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:31:24,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-10-15 20:31:24,070 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 33 [2020-10-15 20:31:24,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:24,070 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-10-15 20:31:24,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:31:24,070 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-10-15 20:31:24,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:31:24,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:24,070 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:24,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2020-10-15 20:31:24,271 INFO L429 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:24,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:24,271 INFO L82 PathProgramCache]: Analyzing trace with hash 112298296, now seen corresponding path program 344 times [2020-10-15 20:31:24,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:24,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506768253] [2020-10-15 20:31:24,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:25,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506768253] [2020-10-15 20:31:25,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195006849] [2020-10-15 20:31:25,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:25,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:31:25,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:25,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:31:25,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:25,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:31:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:25,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:25,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:31:25,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394642511] [2020-10-15 20:31:25,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:31:25,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:25,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:31:25,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:31:25,406 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 30 states. [2020-10-15 20:31:28,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:28,121 INFO L93 Difference]: Finished difference Result 162 states and 371 transitions. [2020-10-15 20:31:28,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:31:28,126 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:31:28,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:28,126 INFO L225 Difference]: With dead ends: 162 [2020-10-15 20:31:28,126 INFO L226 Difference]: Without dead ends: 156 [2020-10-15 20:31:28,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1057, Invalid=3103, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 20:31:28,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-15 20:31:28,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 92. [2020-10-15 20:31:28,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:31:28,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 231 transitions. [2020-10-15 20:31:28,129 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 231 transitions. Word has length 33 [2020-10-15 20:31:28,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:28,129 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 231 transitions. [2020-10-15 20:31:28,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:31:28,129 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 231 transitions. [2020-10-15 20:31:28,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:31:28,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:28,130 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:28,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2020-10-15 20:31:28,330 INFO L429 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:28,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1189490890, now seen corresponding path program 345 times [2020-10-15 20:31:28,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:28,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698274427] [2020-10-15 20:31:28,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:29,282 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:29,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698274427] [2020-10-15 20:31:29,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131260966] [2020-10-15 20:31:29,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:29,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 20:31:29,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:29,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:31:29,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:29,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:29,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:31:29,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629954750] [2020-10-15 20:31:29,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:31:29,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:29,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:31:29,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:31:29,403 INFO L87 Difference]: Start difference. First operand 92 states and 231 transitions. Second operand 29 states. [2020-10-15 20:31:31,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:31,988 INFO L93 Difference]: Finished difference Result 163 states and 375 transitions. [2020-10-15 20:31:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 20:31:31,990 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:31:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:31,991 INFO L225 Difference]: With dead ends: 163 [2020-10-15 20:31:31,991 INFO L226 Difference]: Without dead ends: 157 [2020-10-15 20:31:31,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1116, Invalid=3174, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 20:31:31,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-15 20:31:31,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2020-10-15 20:31:31,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 20:31:31,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 239 transitions. [2020-10-15 20:31:31,994 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 239 transitions. Word has length 33 [2020-10-15 20:31:31,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:31,994 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 239 transitions. [2020-10-15 20:31:31,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:31:31,994 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 239 transitions. [2020-10-15 20:31:31,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:31:31,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:31,994 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:32,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2020-10-15 20:31:32,195 INFO L429 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:32,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:32,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2000039526, now seen corresponding path program 346 times [2020-10-15 20:31:32,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:32,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054774720] [2020-10-15 20:31:32,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:33,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054774720] [2020-10-15 20:31:33,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554052654] [2020-10-15 20:31:33,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:33,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:31:33,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:33,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:31:33,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:33,260 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:31:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:33,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:33,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:31:33,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798588383] [2020-10-15 20:31:33,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:31:33,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:33,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:31:33,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:31:33,289 INFO L87 Difference]: Start difference. First operand 95 states and 239 transitions. Second operand 30 states. [2020-10-15 20:31:35,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:35,961 INFO L93 Difference]: Finished difference Result 160 states and 369 transitions. [2020-10-15 20:31:35,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:31:35,963 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:31:35,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:35,964 INFO L225 Difference]: With dead ends: 160 [2020-10-15 20:31:35,964 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 20:31:35,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1120, Invalid=3302, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 20:31:35,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 20:31:35,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 94. [2020-10-15 20:31:35,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 20:31:35,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 237 transitions. [2020-10-15 20:31:35,967 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 237 transitions. Word has length 33 [2020-10-15 20:31:35,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:35,967 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 237 transitions. [2020-10-15 20:31:35,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:31:35,967 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 237 transitions. [2020-10-15 20:31:35,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:31:35,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:35,967 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:36,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:36,168 INFO L429 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:36,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:36,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1947762920, now seen corresponding path program 347 times [2020-10-15 20:31:36,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:36,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922836249] [2020-10-15 20:31:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:37,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922836249] [2020-10-15 20:31:37,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310273042] [2020-10-15 20:31:37,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:37,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 20:31:37,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:37,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:31:37,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:37,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:37,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:31:37,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008190401] [2020-10-15 20:31:37,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:31:37,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:37,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:31:37,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:31:37,254 INFO L87 Difference]: Start difference. First operand 94 states and 237 transitions. Second operand 29 states. [2020-10-15 20:31:39,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:39,780 INFO L93 Difference]: Finished difference Result 161 states and 373 transitions. [2020-10-15 20:31:39,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:31:39,783 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:31:39,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:39,783 INFO L225 Difference]: With dead ends: 161 [2020-10-15 20:31:39,783 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 20:31:39,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 20:31:39,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 20:31:39,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 97. [2020-10-15 20:31:39,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 20:31:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 245 transitions. [2020-10-15 20:31:39,786 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 245 transitions. Word has length 33 [2020-10-15 20:31:39,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:39,786 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 245 transitions. [2020-10-15 20:31:39,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:31:39,786 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 245 transitions. [2020-10-15 20:31:39,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:31:39,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:39,786 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:39,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2020-10-15 20:31:39,987 INFO L429 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:39,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:39,987 INFO L82 PathProgramCache]: Analyzing trace with hash -71513476, now seen corresponding path program 348 times [2020-10-15 20:31:39,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:39,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093183978] [2020-10-15 20:31:39,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:40,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093183978] [2020-10-15 20:31:40,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710000866] [2020-10-15 20:31:40,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:40,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 20:31:40,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:40,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:31:40,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:40,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:31:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:41,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:41,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:31:41,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933798174] [2020-10-15 20:31:41,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:31:41,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:41,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:31:41,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:31:41,031 INFO L87 Difference]: Start difference. First operand 97 states and 245 transitions. Second operand 30 states. [2020-10-15 20:31:44,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:44,146 INFO L93 Difference]: Finished difference Result 158 states and 367 transitions. [2020-10-15 20:31:44,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:31:44,148 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:31:44,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:44,149 INFO L225 Difference]: With dead ends: 158 [2020-10-15 20:31:44,149 INFO L226 Difference]: Without dead ends: 152 [2020-10-15 20:31:44,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1199, Invalid=3493, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 20:31:44,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-15 20:31:44,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 96. [2020-10-15 20:31:44,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 20:31:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 243 transitions. [2020-10-15 20:31:44,151 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 243 transitions. Word has length 33 [2020-10-15 20:31:44,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:44,152 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 243 transitions. [2020-10-15 20:31:44,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:31:44,152 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 243 transitions. [2020-10-15 20:31:44,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:31:44,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:44,152 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:44,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2020-10-15 20:31:44,353 INFO L429 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:44,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:44,353 INFO L82 PathProgramCache]: Analyzing trace with hash 616808314, now seen corresponding path program 349 times [2020-10-15 20:31:44,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:44,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894821408] [2020-10-15 20:31:44,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:45,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894821408] [2020-10-15 20:31:45,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572664224] [2020-10-15 20:31:45,251 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 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:45,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:31:45,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:45,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:45,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:31:45,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798774036] [2020-10-15 20:31:45,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:31:45,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:45,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:31:45,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:31:45,358 INFO L87 Difference]: Start difference. First operand 96 states and 243 transitions. Second operand 29 states. [2020-10-15 20:31:48,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:48,242 INFO L93 Difference]: Finished difference Result 159 states and 371 transitions. [2020-10-15 20:31:48,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 20:31:48,245 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:31:48,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:48,245 INFO L225 Difference]: With dead ends: 159 [2020-10-15 20:31:48,245 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 20:31:48,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1288, Invalid=3542, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 20:31:48,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 20:31:48,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 99. [2020-10-15 20:31:48,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 20:31:48,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 251 transitions. [2020-10-15 20:31:48,247 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 251 transitions. Word has length 33 [2020-10-15 20:31:48,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:48,247 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 251 transitions. [2020-10-15 20:31:48,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:31:48,248 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 251 transitions. [2020-10-15 20:31:48,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:31:48,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:48,248 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:48,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:48,449 INFO L429 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:48,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:48,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1601999838, now seen corresponding path program 350 times [2020-10-15 20:31:48,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:48,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265250255] [2020-10-15 20:31:48,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:49,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265250255] [2020-10-15 20:31:49,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424965279] [2020-10-15 20:31:49,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:49,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:31:49,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:49,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:31:49,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:49,569 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:31:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:49,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:49,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:31:49,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179570322] [2020-10-15 20:31:49,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:31:49,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:49,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:31:49,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:31:49,613 INFO L87 Difference]: Start difference. First operand 99 states and 251 transitions. Second operand 30 states. [2020-10-15 20:31:52,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:52,916 INFO L93 Difference]: Finished difference Result 156 states and 365 transitions. [2020-10-15 20:31:52,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 20:31:52,919 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:31:52,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:52,919 INFO L225 Difference]: With dead ends: 156 [2020-10-15 20:31:52,919 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 20:31:52,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1294, Invalid=3676, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 20:31:52,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 20:31:52,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 98. [2020-10-15 20:31:52,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 20:31:52,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 249 transitions. [2020-10-15 20:31:52,921 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 249 transitions. Word has length 33 [2020-10-15 20:31:52,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:52,921 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 249 transitions. [2020-10-15 20:31:52,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:31:52,921 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 249 transitions. [2020-10-15 20:31:52,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:31:52,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:52,921 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:53,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:53,122 INFO L429 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:53,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:53,123 INFO L82 PathProgramCache]: Analyzing trace with hash -15159204, now seen corresponding path program 351 times [2020-10-15 20:31:53,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:53,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453290233] [2020-10-15 20:31:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:54,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453290233] [2020-10-15 20:31:54,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149428894] [2020-10-15 20:31:54,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:54,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 20:31:54,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:54,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:31:54,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:54,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:54,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:31:54,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324283345] [2020-10-15 20:31:54,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:31:54,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:54,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:31:54,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:31:54,235 INFO L87 Difference]: Start difference. First operand 98 states and 249 transitions. Second operand 29 states. [2020-10-15 20:31:57,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:31:57,451 INFO L93 Difference]: Finished difference Result 157 states and 369 transitions. [2020-10-15 20:31:57,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 20:31:57,455 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:31:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:31:57,455 INFO L225 Difference]: With dead ends: 157 [2020-10-15 20:31:57,455 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 20:31:57,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1398, Invalid=3714, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 20:31:57,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 20:31:57,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 101. [2020-10-15 20:31:57,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 20:31:57,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 257 transitions. [2020-10-15 20:31:57,458 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 257 transitions. Word has length 33 [2020-10-15 20:31:57,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:31:57,459 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 257 transitions. [2020-10-15 20:31:57,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:31:57,459 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 257 transitions. [2020-10-15 20:31:57,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:31:57,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:31:57,459 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:31:57,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:57,660 INFO L429 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:31:57,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:31:57,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1241730496, now seen corresponding path program 352 times [2020-10-15 20:31:57,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:31:57,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111624023] [2020-10-15 20:31:57,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:31:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:31:58,612 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:58,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111624023] [2020-10-15 20:31:58,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248690156] [2020-10-15 20:31:58,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:31:58,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:31:58,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:31:58,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:31:58,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:31:58,732 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:31:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:31:58,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:31:58,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:31:58,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294573048] [2020-10-15 20:31:58,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:31:58,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:31:58,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:31:58,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:31:58,773 INFO L87 Difference]: Start difference. First operand 101 states and 257 transitions. Second operand 30 states. [2020-10-15 20:32:02,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:02,577 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-10-15 20:32:02,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 20:32:02,581 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:32:02,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:02,581 INFO L225 Difference]: With dead ends: 154 [2020-10-15 20:32:02,581 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 20:32:02,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1405, Invalid=3851, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 20:32:02,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 20:32:02,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 100. [2020-10-15 20:32:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 20:32:02,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 255 transitions. [2020-10-15 20:32:02,584 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 255 transitions. Word has length 33 [2020-10-15 20:32:02,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:02,584 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 255 transitions. [2020-10-15 20:32:02,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:32:02,585 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 255 transitions. [2020-10-15 20:32:02,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:32:02,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:02,585 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:02,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2020-10-15 20:32:02,786 INFO L429 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:02,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:02,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1437044290, now seen corresponding path program 353 times [2020-10-15 20:32:02,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:02,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333167896] [2020-10-15 20:32:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:03,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333167896] [2020-10-15 20:32:03,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804934868] [2020-10-15 20:32:03,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:03,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 20:32:03,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:32:03,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:32:03,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:03,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:03,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:32:03,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157266280] [2020-10-15 20:32:03,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:32:03,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:03,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:32:03,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:32:03,845 INFO L87 Difference]: Start difference. First operand 100 states and 255 transitions. Second operand 29 states. [2020-10-15 20:32:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:07,246 INFO L93 Difference]: Finished difference Result 155 states and 367 transitions. [2020-10-15 20:32:07,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 20:32:07,250 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:32:07,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:07,251 INFO L225 Difference]: With dead ends: 155 [2020-10-15 20:32:07,251 INFO L226 Difference]: Without dead ends: 149 [2020-10-15 20:32:07,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1524, Invalid=3878, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 20:32:07,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-15 20:32:07,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2020-10-15 20:32:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 20:32:07,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 263 transitions. [2020-10-15 20:32:07,253 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 263 transitions. Word has length 33 [2020-10-15 20:32:07,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:07,254 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 263 transitions. [2020-10-15 20:32:07,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:32:07,254 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 263 transitions. [2020-10-15 20:32:07,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:32:07,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:07,254 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:07,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2020-10-15 20:32:07,455 INFO L429 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:07,455 INFO L82 PathProgramCache]: Analyzing trace with hash -917301214, now seen corresponding path program 354 times [2020-10-15 20:32:07,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:07,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836884999] [2020-10-15 20:32:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:08,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836884999] [2020-10-15 20:32:08,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304427217] [2020-10-15 20:32:08,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:08,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 20:32:08,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:32:08,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:32:08,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:08,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:32:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:08,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:08,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:32:08,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211277090] [2020-10-15 20:32:08,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:32:08,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:08,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:32:08,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:32:08,552 INFO L87 Difference]: Start difference. First operand 103 states and 263 transitions. Second operand 30 states. [2020-10-15 20:32:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:12,410 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-10-15 20:32:12,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 20:32:12,412 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:32:12,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:12,413 INFO L225 Difference]: With dead ends: 152 [2020-10-15 20:32:12,413 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 20:32:12,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1532, Invalid=4018, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 20:32:12,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 20:32:12,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 102. [2020-10-15 20:32:12,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-15 20:32:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 261 transitions. [2020-10-15 20:32:12,416 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 261 transitions. Word has length 33 [2020-10-15 20:32:12,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:12,416 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 261 transitions. [2020-10-15 20:32:12,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:32:12,416 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 261 transitions. [2020-10-15 20:32:12,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:32:12,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:12,416 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:12,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:12,617 INFO L429 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:12,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:12,618 INFO L82 PathProgramCache]: Analyzing trace with hash 738010016, now seen corresponding path program 355 times [2020-10-15 20:32:12,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:12,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468442139] [2020-10-15 20:32:12,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:13,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468442139] [2020-10-15 20:32:13,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080279935] [2020-10-15 20:32:13,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:13,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:32:13,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:13,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:13,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:32:13,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842921738] [2020-10-15 20:32:13,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:32:13,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:13,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:32:13,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:32:13,564 INFO L87 Difference]: Start difference. First operand 102 states and 261 transitions. Second operand 29 states. [2020-10-15 20:32:17,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:17,282 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-10-15 20:32:17,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 20:32:17,287 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:32:17,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:17,287 INFO L225 Difference]: With dead ends: 153 [2020-10-15 20:32:17,287 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 20:32:17,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1666, Invalid=4034, Unknown=0, NotChecked=0, Total=5700 [2020-10-15 20:32:17,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 20:32:17,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 105. [2020-10-15 20:32:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 20:32:17,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-15 20:32:17,290 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 33 [2020-10-15 20:32:17,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:17,290 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-15 20:32:17,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:32:17,290 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-15 20:32:17,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:32:17,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:17,291 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:17,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2020-10-15 20:32:17,491 INFO L429 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:17,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:17,492 INFO L82 PathProgramCache]: Analyzing trace with hash -982117628, now seen corresponding path program 356 times [2020-10-15 20:32:17,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:17,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127141774] [2020-10-15 20:32:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:18,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127141774] [2020-10-15 20:32:18,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729409638] [2020-10-15 20:32:18,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:18,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:32:18,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:32:18,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:32:18,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:18,471 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:32:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:18,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:18,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:32:18,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789022340] [2020-10-15 20:32:18,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:32:18,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:18,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:32:18,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:32:18,515 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 30 states. [2020-10-15 20:32:22,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:22,796 INFO L93 Difference]: Finished difference Result 150 states and 359 transitions. [2020-10-15 20:32:22,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 20:32:22,800 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:32:22,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:22,801 INFO L225 Difference]: With dead ends: 150 [2020-10-15 20:32:22,801 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 20:32:22,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1675, Invalid=4177, Unknown=0, NotChecked=0, Total=5852 [2020-10-15 20:32:22,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 20:32:22,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 104. [2020-10-15 20:32:22,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 20:32:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-15 20:32:22,804 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 33 [2020-10-15 20:32:22,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:22,804 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-15 20:32:22,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:32:22,804 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-15 20:32:22,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:32:22,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:22,804 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:23,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:23,005 INFO L429 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:23,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:23,006 INFO L82 PathProgramCache]: Analyzing trace with hash -511121918, now seen corresponding path program 357 times [2020-10-15 20:32:23,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:23,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335685338] [2020-10-15 20:32:23,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:23,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335685338] [2020-10-15 20:32:23,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403314065] [2020-10-15 20:32:23,825 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 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:23,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 20:32:23,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:32:23,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:32:23,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:23,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:23,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:32:23,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623874241] [2020-10-15 20:32:23,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:32:23,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:23,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:32:23,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:32:23,945 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 29 states. [2020-10-15 20:32:27,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:27,437 INFO L93 Difference]: Finished difference Result 151 states and 363 transitions. [2020-10-15 20:32:27,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-15 20:32:27,440 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:32:27,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:27,441 INFO L225 Difference]: With dead ends: 151 [2020-10-15 20:32:27,441 INFO L226 Difference]: Without dead ends: 145 [2020-10-15 20:32:27,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1824, Invalid=4182, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 20:32:27,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-15 20:32:27,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 107. [2020-10-15 20:32:27,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-15 20:32:27,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 275 transitions. [2020-10-15 20:32:27,443 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 275 transitions. Word has length 33 [2020-10-15 20:32:27,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:27,443 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 275 transitions. [2020-10-15 20:32:27,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:32:27,443 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 275 transitions. [2020-10-15 20:32:27,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:32:27,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:27,444 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:27,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2020-10-15 20:32:27,644 INFO L429 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:27,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:27,645 INFO L82 PathProgramCache]: Analyzing trace with hash -495034778, now seen corresponding path program 358 times [2020-10-15 20:32:27,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:27,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440149226] [2020-10-15 20:32:27,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:28,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440149226] [2020-10-15 20:32:28,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922148599] [2020-10-15 20:32:28,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:28,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:32:28,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:32:28,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:32:28,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:28,746 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:32:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:28,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:28,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:32:28,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972511684] [2020-10-15 20:32:28,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:32:28,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:28,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:32:28,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:32:28,799 INFO L87 Difference]: Start difference. First operand 107 states and 275 transitions. Second operand 30 states. [2020-10-15 20:32:33,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:33,105 INFO L93 Difference]: Finished difference Result 148 states and 357 transitions. [2020-10-15 20:32:33,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-15 20:32:33,107 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:32:33,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:33,108 INFO L225 Difference]: With dead ends: 148 [2020-10-15 20:32:33,108 INFO L226 Difference]: Without dead ends: 142 [2020-10-15 20:32:33,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1834, Invalid=4328, Unknown=0, NotChecked=0, Total=6162 [2020-10-15 20:32:33,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-15 20:32:33,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 106. [2020-10-15 20:32:33,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-15 20:32:33,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2020-10-15 20:32:33,111 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 33 [2020-10-15 20:32:33,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:33,111 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2020-10-15 20:32:33,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:32:33,111 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2020-10-15 20:32:33,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:32:33,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:33,112 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:33,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:33,312 INFO L429 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:33,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:33,313 INFO L82 PathProgramCache]: Analyzing trace with hash -494544668, now seen corresponding path program 359 times [2020-10-15 20:32:33,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:33,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743522399] [2020-10-15 20:32:33,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:34,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743522399] [2020-10-15 20:32:34,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923111964] [2020-10-15 20:32:34,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:34,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 20:32:34,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:32:34,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:32:34,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:34,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:34,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-15 20:32:34,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370098928] [2020-10-15 20:32:34,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 20:32:34,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:34,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 20:32:34,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:32:34,418 INFO L87 Difference]: Start difference. First operand 106 states and 273 transitions. Second operand 29 states. [2020-10-15 20:32:38,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:38,247 INFO L93 Difference]: Finished difference Result 168 states and 407 transitions. [2020-10-15 20:32:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 20:32:38,250 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-15 20:32:38,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:38,251 INFO L225 Difference]: With dead ends: 168 [2020-10-15 20:32:38,251 INFO L226 Difference]: Without dead ends: 162 [2020-10-15 20:32:38,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1998, Invalid=4322, Unknown=0, NotChecked=0, Total=6320 [2020-10-15 20:32:38,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-15 20:32:38,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 112. [2020-10-15 20:32:38,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-15 20:32:38,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 293 transitions. [2020-10-15 20:32:38,254 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 293 transitions. Word has length 33 [2020-10-15 20:32:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:38,254 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 293 transitions. [2020-10-15 20:32:38,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 20:32:38,254 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 293 transitions. [2020-10-15 20:32:38,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 20:32:38,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:38,255 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:38,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:38,455 INFO L429 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:38,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:38,456 INFO L82 PathProgramCache]: Analyzing trace with hash -494527928, now seen corresponding path program 360 times [2020-10-15 20:32:38,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:38,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338378101] [2020-10-15 20:32:38,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:39,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338378101] [2020-10-15 20:32:39,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197361162] [2020-10-15 20:32:39,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:39,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 20:32:39,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:32:39,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-15 20:32:39,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:39,497 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:32:39,545 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:39,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:39,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-15 20:32:39,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013893518] [2020-10-15 20:32:39,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:32:39,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:39,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:32:39,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:32:39,546 INFO L87 Difference]: Start difference. First operand 112 states and 293 transitions. Second operand 30 states. [2020-10-15 20:32:43,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:43,652 INFO L93 Difference]: Finished difference Result 149 states and 363 transitions. [2020-10-15 20:32:43,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-15 20:32:43,656 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-15 20:32:43,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:43,656 INFO L225 Difference]: With dead ends: 149 [2020-10-15 20:32:43,656 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 20:32:43,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2009, Invalid=4471, Unknown=0, NotChecked=0, Total=6480 [2020-10-15 20:32:43,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 20:32:43,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 109. [2020-10-15 20:32:43,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-15 20:32:43,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-10-15 20:32:43,658 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-10-15 20:32:43,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:43,658 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-10-15 20:32:43,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:32:43,659 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-10-15 20:32:43,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:32:43,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:43,659 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:43,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:43,860 INFO L429 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:43,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:43,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1551441143, now seen corresponding path program 361 times [2020-10-15 20:32:43,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:43,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827075989] [2020-10-15 20:32:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:45,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827075989] [2020-10-15 20:32:45,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279966577] [2020-10-15 20:32:45,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:45,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:32:45,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:45,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:45,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:32:45,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75789066] [2020-10-15 20:32:45,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:32:45,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:45,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:32:45,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:32:45,182 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 30 states. [2020-10-15 20:32:47,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:47,220 INFO L93 Difference]: Finished difference Result 174 states and 411 transitions. [2020-10-15 20:32:47,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:32:47,223 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:32:47,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:47,223 INFO L225 Difference]: With dead ends: 174 [2020-10-15 20:32:47,223 INFO L226 Difference]: Without dead ends: 168 [2020-10-15 20:32:47,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=975, Invalid=2217, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:32:47,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-15 20:32:47,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 111. [2020-10-15 20:32:47,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:32:47,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:32:47,226 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:32:47,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:47,226 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:32:47,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:32:47,226 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:32:47,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:32:47,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:47,227 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:47,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable362 [2020-10-15 20:32:47,427 INFO L429 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:47,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:47,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1122267739, now seen corresponding path program 362 times [2020-10-15 20:32:47,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:47,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30683127] [2020-10-15 20:32:47,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:48,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30683127] [2020-10-15 20:32:48,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28752329] [2020-10-15 20:32:48,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:48,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:32:48,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:32:48,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:32:48,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:48,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:32:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:48,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:48,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:32:48,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510920353] [2020-10-15 20:32:48,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:32:48,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:48,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:32:48,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:32:48,913 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:32:51,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:51,079 INFO L93 Difference]: Finished difference Result 171 states and 405 transitions. [2020-10-15 20:32:51,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:32:51,083 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:32:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:51,084 INFO L225 Difference]: With dead ends: 171 [2020-10-15 20:32:51,084 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 20:32:51,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1034, Invalid=2506, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:32:51,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 20:32:51,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 110. [2020-10-15 20:32:51,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:32:51,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:32:51,086 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:32:51,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:51,087 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:32:51,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:32:51,087 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:32:51,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:32:51,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:51,087 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:51,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:51,288 INFO L429 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:51,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:51,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1692542375, now seen corresponding path program 363 times [2020-10-15 20:32:51,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:51,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853639233] [2020-10-15 20:32:51,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:52,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853639233] [2020-10-15 20:32:52,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497575082] [2020-10-15 20:32:52,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:52,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 20:32:52,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:32:52,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:32:52,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:52,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:52,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:32:52,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402095199] [2020-10-15 20:32:52,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:32:52,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:52,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:32:52,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:32:52,465 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:32:55,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:55,119 INFO L93 Difference]: Finished difference Result 168 states and 399 transitions. [2020-10-15 20:32:55,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:32:55,121 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:32:55,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:55,122 INFO L225 Difference]: With dead ends: 168 [2020-10-15 20:32:55,122 INFO L226 Difference]: Without dead ends: 162 [2020-10-15 20:32:55,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 20:32:55,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-15 20:32:55,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 111. [2020-10-15 20:32:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:32:55,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:32:55,129 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:32:55,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:55,129 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:32:55,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:32:55,129 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:32:55,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:32:55,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:55,130 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:55,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2020-10-15 20:32:55,331 INFO L429 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:55,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:55,331 INFO L82 PathProgramCache]: Analyzing trace with hash 778516669, now seen corresponding path program 364 times [2020-10-15 20:32:55,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:55,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018087770] [2020-10-15 20:32:55,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:32:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:56,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018087770] [2020-10-15 20:32:56,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191285884] [2020-10-15 20:32:56,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:56,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:32:56,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:32:56,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:32:56,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:32:56,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:32:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:32:56,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:32:56,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:32:56,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462887307] [2020-10-15 20:32:56,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:32:56,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:32:56,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:32:56,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:32:56,590 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:32:59,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:32:59,481 INFO L93 Difference]: Finished difference Result 167 states and 397 transitions. [2020-10-15 20:32:59,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:32:59,484 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:32:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:32:59,485 INFO L225 Difference]: With dead ends: 167 [2020-10-15 20:32:59,485 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 20:32:59,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1040, Invalid=2742, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 20:32:59,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 20:32:59,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2020-10-15 20:32:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:32:59,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:32:59,488 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:32:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:32:59,488 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:32:59,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:32:59,488 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:32:59,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:32:59,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:32:59,488 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:32:59,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:32:59,689 INFO L429 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:32:59,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:32:59,690 INFO L82 PathProgramCache]: Analyzing trace with hash -46757829, now seen corresponding path program 365 times [2020-10-15 20:32:59,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:32:59,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590411536] [2020-10-15 20:32:59,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:32:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:01,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590411536] [2020-10-15 20:33:01,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381104010] [2020-10-15 20:33:01,033 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 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:01,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 20:33:01,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:01,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:33:01,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:01,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:01,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:33:01,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810347854] [2020-10-15 20:33:01,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:33:01,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:01,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:33:01,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:33:01,132 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:33:03,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:03,977 INFO L93 Difference]: Finished difference Result 164 states and 391 transitions. [2020-10-15 20:33:03,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:33:03,981 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:33:03,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:03,982 INFO L225 Difference]: With dead ends: 164 [2020-10-15 20:33:03,982 INFO L226 Difference]: Without dead ends: 158 [2020-10-15 20:33:03,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=989, Invalid=2671, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:33:03,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-15 20:33:03,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 111. [2020-10-15 20:33:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:33:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:33:03,985 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:33:03,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:03,985 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:33:03,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:33:03,985 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:33:03,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:33:03,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:03,985 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:04,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2020-10-15 20:33:04,186 INFO L429 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:04,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:04,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1085526113, now seen corresponding path program 366 times [2020-10-15 20:33:04,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:04,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346670509] [2020-10-15 20:33:04,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:05,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346670509] [2020-10-15 20:33:05,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527652577] [2020-10-15 20:33:05,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:05,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 20:33:05,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:05,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:33:05,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:05,858 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:33:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:05,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:05,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:33:05,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486119703] [2020-10-15 20:33:05,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:33:05,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:05,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:33:05,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:33:05,895 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:33:08,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:08,901 INFO L93 Difference]: Finished difference Result 163 states and 389 transitions. [2020-10-15 20:33:08,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:33:08,904 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:33:08,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:08,904 INFO L225 Difference]: With dead ends: 163 [2020-10-15 20:33:08,904 INFO L226 Difference]: Without dead ends: 157 [2020-10-15 20:33:08,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1062, Invalid=2970, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 20:33:08,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-15 20:33:08,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2020-10-15 20:33:08,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:33:08,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:33:08,907 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:33:08,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:08,907 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:33:08,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:33:08,907 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:33:08,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:33:08,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:08,908 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:09,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2020-10-15 20:33:09,109 INFO L429 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:09,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:09,109 INFO L82 PathProgramCache]: Analyzing trace with hash -670742883, now seen corresponding path program 367 times [2020-10-15 20:33:09,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:09,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000874775] [2020-10-15 20:33:09,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:10,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000874775] [2020-10-15 20:33:10,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948471119] [2020-10-15 20:33:10,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:10,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:33:10,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:10,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:10,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:33:10,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262579422] [2020-10-15 20:33:10,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:33:10,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:10,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:33:10,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:33:10,321 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:33:13,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:13,448 INFO L93 Difference]: Finished difference Result 160 states and 383 transitions. [2020-10-15 20:33:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:33:13,452 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:33:13,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:13,453 INFO L225 Difference]: With dead ends: 160 [2020-10-15 20:33:13,453 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 20:33:13,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1020, Invalid=2886, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:33:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 20:33:13,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 111. [2020-10-15 20:33:13,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:33:13,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:33:13,456 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:33:13,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:13,456 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:33:13,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:33:13,456 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:33:13,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:33:13,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:13,457 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:13,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:13,657 INFO L429 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:13,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:13,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1902475009, now seen corresponding path program 368 times [2020-10-15 20:33:13,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:13,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123827745] [2020-10-15 20:33:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:15,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123827745] [2020-10-15 20:33:15,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302432060] [2020-10-15 20:33:15,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:15,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:33:15,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:15,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:33:15,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:15,131 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:33:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:15,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:15,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:33:15,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583648565] [2020-10-15 20:33:15,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:33:15,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:15,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:33:15,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:33:15,163 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:33:18,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:18,547 INFO L93 Difference]: Finished difference Result 159 states and 381 transitions. [2020-10-15 20:33:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:33:18,549 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:33:18,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:18,550 INFO L225 Difference]: With dead ends: 159 [2020-10-15 20:33:18,550 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 20:33:18,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1100, Invalid=3190, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 20:33:18,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 20:33:18,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 110. [2020-10-15 20:33:18,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:33:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:33:18,552 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:33:18,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:18,552 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:33:18,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:33:18,552 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:33:18,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:33:18,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:18,553 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:18,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2020-10-15 20:33:18,753 INFO L429 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:18,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:18,754 INFO L82 PathProgramCache]: Analyzing trace with hash 718550399, now seen corresponding path program 369 times [2020-10-15 20:33:18,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:18,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937958656] [2020-10-15 20:33:18,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:19,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937958656] [2020-10-15 20:33:19,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75783390] [2020-10-15 20:33:19,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:19,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 20:33:19,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:19,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:33:19,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:19,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:19,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:33:19,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899168970] [2020-10-15 20:33:19,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:33:19,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:19,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:33:19,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:33:19,865 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:33:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:22,537 INFO L93 Difference]: Finished difference Result 156 states and 375 transitions. [2020-10-15 20:33:22,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:33:22,541 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:33:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:22,542 INFO L225 Difference]: With dead ends: 156 [2020-10-15 20:33:22,542 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 20:33:22,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1067, Invalid=3093, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 20:33:22,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 20:33:22,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 111. [2020-10-15 20:33:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:33:22,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:33:22,545 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:33:22,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:22,545 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:33:22,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:33:22,545 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:33:22,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:33:22,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:22,545 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:22,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:22,746 INFO L429 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:22,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:22,747 INFO L82 PathProgramCache]: Analyzing trace with hash -829608221, now seen corresponding path program 370 times [2020-10-15 20:33:22,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:22,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406740180] [2020-10-15 20:33:22,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:24,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406740180] [2020-10-15 20:33:24,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337043772] [2020-10-15 20:33:24,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:24,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:33:24,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:24,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:33:24,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:24,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:33:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:24,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:24,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:33:24,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145426350] [2020-10-15 20:33:24,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:33:24,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:24,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:33:24,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:33:24,328 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:33:28,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:28,030 INFO L93 Difference]: Finished difference Result 155 states and 373 transitions. [2020-10-15 20:33:28,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:33:28,032 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:33:28,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:28,032 INFO L225 Difference]: With dead ends: 155 [2020-10-15 20:33:28,032 INFO L226 Difference]: Without dead ends: 149 [2020-10-15 20:33:28,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1154, Invalid=3402, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 20:33:28,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-15 20:33:28,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 110. [2020-10-15 20:33:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:33:28,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:33:28,035 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:33:28,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:28,035 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:33:28,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:33:28,035 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:33:28,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:33:28,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:28,036 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:28,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:28,237 INFO L429 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:28,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:28,237 INFO L82 PathProgramCache]: Analyzing trace with hash -2131397407, now seen corresponding path program 371 times [2020-10-15 20:33:28,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:28,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811295283] [2020-10-15 20:33:28,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:29,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811295283] [2020-10-15 20:33:29,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418432414] [2020-10-15 20:33:29,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:29,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 20:33:29,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:29,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:33:29,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:29,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:29,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:33:29,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853111659] [2020-10-15 20:33:29,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:33:29,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:29,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:33:29,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:33:29,309 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:33:32,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:32,270 INFO L93 Difference]: Finished difference Result 152 states and 367 transitions. [2020-10-15 20:33:32,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 20:33:32,273 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:33:32,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:32,274 INFO L225 Difference]: With dead ends: 152 [2020-10-15 20:33:32,274 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 20:33:32,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1130, Invalid=3292, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 20:33:32,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 20:33:32,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 111. [2020-10-15 20:33:32,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:33:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:33:32,276 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:33:32,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:32,276 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:33:32,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:33:32,276 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:33:32,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:33:32,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:32,277 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:32,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:32,477 INFO L429 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:32,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:32,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1353021253, now seen corresponding path program 372 times [2020-10-15 20:33:32,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:32,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885673555] [2020-10-15 20:33:32,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:33,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885673555] [2020-10-15 20:33:33,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389435711] [2020-10-15 20:33:33,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:33,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 20:33:33,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:33,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:33:33,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:33,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:33:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:33,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:33,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:33:33,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072362717] [2020-10-15 20:33:33,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:33:33,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:33,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:33:33,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:33:33,656 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:33:37,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:37,044 INFO L93 Difference]: Finished difference Result 151 states and 365 transitions. [2020-10-15 20:33:37,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:33:37,047 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:33:37,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:37,047 INFO L225 Difference]: With dead ends: 151 [2020-10-15 20:33:37,047 INFO L226 Difference]: Without dead ends: 145 [2020-10-15 20:33:37,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1224, Invalid=3606, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 20:33:37,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-15 20:33:37,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 110. [2020-10-15 20:33:37,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:33:37,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:33:37,050 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:33:37,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:37,050 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:33:37,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:33:37,050 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:33:37,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:33:37,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:37,051 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:37,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:37,251 INFO L429 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:37,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:37,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1405297859, now seen corresponding path program 373 times [2020-10-15 20:33:37,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:37,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427411013] [2020-10-15 20:33:37,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:38,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427411013] [2020-10-15 20:33:38,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508532796] [2020-10-15 20:33:38,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:38,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:33:38,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:38,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:38,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:33:38,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892336703] [2020-10-15 20:33:38,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:33:38,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:38,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:33:38,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:33:38,396 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:33:41,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:41,544 INFO L93 Difference]: Finished difference Result 148 states and 359 transitions. [2020-10-15 20:33:41,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:33:41,547 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:33:41,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:41,548 INFO L225 Difference]: With dead ends: 148 [2020-10-15 20:33:41,548 INFO L226 Difference]: Without dead ends: 142 [2020-10-15 20:33:41,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1209, Invalid=3483, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 20:33:41,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-15 20:33:41,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 111. [2020-10-15 20:33:41,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:33:41,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:33:41,550 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:33:41,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:41,551 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:33:41,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:33:41,551 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:33:41,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:33:41,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:41,551 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:41,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2020-10-15 20:33:41,752 INFO L429 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:41,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:41,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1013419993, now seen corresponding path program 374 times [2020-10-15 20:33:41,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:41,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993900251] [2020-10-15 20:33:41,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:42,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993900251] [2020-10-15 20:33:42,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284289818] [2020-10-15 20:33:42,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:42,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:33:42,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:42,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:33:42,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:42,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:33:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:43,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:43,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:33:43,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835408834] [2020-10-15 20:33:43,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:33:43,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:43,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:33:43,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:33:43,012 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:33:47,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:47,172 INFO L93 Difference]: Finished difference Result 147 states and 357 transitions. [2020-10-15 20:33:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 20:33:47,175 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:33:47,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:47,176 INFO L225 Difference]: With dead ends: 147 [2020-10-15 20:33:47,176 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 20:33:47,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1310, Invalid=3802, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 20:33:47,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 20:33:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 110. [2020-10-15 20:33:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:33:47,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:33:47,179 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:33:47,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:47,179 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:33:47,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:33:47,180 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:33:47,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:33:47,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:47,180 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:47,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2020-10-15 20:33:47,381 INFO L429 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:47,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:47,381 INFO L82 PathProgramCache]: Analyzing trace with hash -325098203, now seen corresponding path program 375 times [2020-10-15 20:33:47,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:47,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665996993] [2020-10-15 20:33:47,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:48,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665996993] [2020-10-15 20:33:48,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515099209] [2020-10-15 20:33:48,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:48,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 20:33:48,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:48,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:33:48,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:48,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:48,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:33:48,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038653969] [2020-10-15 20:33:48,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:33:48,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:48,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:33:48,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:33:48,537 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:33:52,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:52,188 INFO L93 Difference]: Finished difference Result 144 states and 351 transitions. [2020-10-15 20:33:52,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 20:33:52,191 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:33:52,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:52,192 INFO L225 Difference]: With dead ends: 144 [2020-10-15 20:33:52,192 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 20:33:52,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1304, Invalid=3666, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 20:33:52,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 20:33:52,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 111. [2020-10-15 20:33:52,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:33:52,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:33:52,195 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:33:52,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:52,195 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:33:52,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:33:52,196 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:33:52,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:33:52,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:52,196 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:52,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2020-10-15 20:33:52,405 INFO L429 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:52,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:52,405 INFO L82 PathProgramCache]: Analyzing trace with hash 660093321, now seen corresponding path program 376 times [2020-10-15 20:33:52,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:52,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127402550] [2020-10-15 20:33:52,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:53,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127402550] [2020-10-15 20:33:53,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046244954] [2020-10-15 20:33:53,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:53,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:33:53,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:53,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:33:53,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:53,606 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:33:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:53,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:53,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:33:53,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761518260] [2020-10-15 20:33:53,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:33:53,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:53,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:33:53,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:33:53,654 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:33:57,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:33:57,940 INFO L93 Difference]: Finished difference Result 143 states and 349 transitions. [2020-10-15 20:33:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 20:33:57,943 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:33:57,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:33:57,943 INFO L225 Difference]: With dead ends: 143 [2020-10-15 20:33:57,944 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 20:33:57,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1412, Invalid=3990, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 20:33:57,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 20:33:57,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 110. [2020-10-15 20:33:57,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:33:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:33:57,946 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:33:57,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:33:57,947 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:33:57,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:33:57,947 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:33:57,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:33:57,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:33:57,947 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:33:58,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2020-10-15 20:33:58,148 INFO L429 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:33:58,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:33:58,149 INFO L82 PathProgramCache]: Analyzing trace with hash -957065721, now seen corresponding path program 377 times [2020-10-15 20:33:58,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:33:58,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157404943] [2020-10-15 20:33:58,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:33:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:33:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:59,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157404943] [2020-10-15 20:33:59,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136298601] [2020-10-15 20:33:59,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:33:59,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 20:33:59,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:33:59,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:33:59,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:33:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:33:59,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:33:59,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:33:59,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518194415] [2020-10-15 20:33:59,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:33:59,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:33:59,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:33:59,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:33:59,308 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:34:02,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:02,653 INFO L93 Difference]: Finished difference Result 140 states and 343 transitions. [2020-10-15 20:34:02,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 20:34:02,656 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:34:02,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:02,657 INFO L225 Difference]: With dead ends: 140 [2020-10-15 20:34:02,657 INFO L226 Difference]: Without dead ends: 134 [2020-10-15 20:34:02,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1415, Invalid=3841, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 20:34:02,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-15 20:34:02,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2020-10-15 20:34:02,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:34:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:34:02,659 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:34:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:02,659 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:34:02,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:34:02,659 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:34:02,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:34:02,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:02,659 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:02,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2020-10-15 20:34:02,860 INFO L429 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:02,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:02,861 INFO L82 PathProgramCache]: Analyzing trace with hash 299823979, now seen corresponding path program 378 times [2020-10-15 20:34:02,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:02,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358781035] [2020-10-15 20:34:02,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:03,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358781035] [2020-10-15 20:34:03,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038379954] [2020-10-15 20:34:03,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:03,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 20:34:03,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:34:03,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:34:03,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:04,053 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:34:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:04,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:04,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:34:04,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081830466] [2020-10-15 20:34:04,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:34:04,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:04,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:34:04,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:34:04,098 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:34:08,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:08,429 INFO L93 Difference]: Finished difference Result 139 states and 341 transitions. [2020-10-15 20:34:08,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 20:34:08,432 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:34:08,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:08,433 INFO L225 Difference]: With dead ends: 139 [2020-10-15 20:34:08,433 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 20:34:08,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1530, Invalid=4170, Unknown=0, NotChecked=0, Total=5700 [2020-10-15 20:34:08,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 20:34:08,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 110. [2020-10-15 20:34:08,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:34:08,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:34:08,435 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:34:08,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:08,436 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:34:08,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:34:08,436 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:34:08,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:34:08,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:08,436 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:08,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2020-10-15 20:34:08,637 INFO L429 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:08,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:08,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1916016489, now seen corresponding path program 379 times [2020-10-15 20:34:08,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:08,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522821829] [2020-10-15 20:34:08,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:09,691 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:09,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522821829] [2020-10-15 20:34:09,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54366311] [2020-10-15 20:34:09,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:09,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:34:09,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:09,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:09,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:34:09,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297538475] [2020-10-15 20:34:09,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:34:09,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:09,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:34:09,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:34:09,806 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:34:14,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:14,085 INFO L93 Difference]: Finished difference Result 136 states and 335 transitions. [2020-10-15 20:34:14,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 20:34:14,088 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:34:14,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:14,089 INFO L225 Difference]: With dead ends: 136 [2020-10-15 20:34:14,089 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 20:34:14,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1542, Invalid=4008, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 20:34:14,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 20:34:14,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2020-10-15 20:34:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:34:14,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:34:14,091 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:34:14,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:14,091 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:34:14,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:34:14,091 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:34:14,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:34:14,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:14,092 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:14,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:14,292 INFO L429 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:14,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:14,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1859207731, now seen corresponding path program 380 times [2020-10-15 20:34:14,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:14,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485794469] [2020-10-15 20:34:14,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:15,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485794469] [2020-10-15 20:34:15,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190944026] [2020-10-15 20:34:15,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:15,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:34:15,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:34:15,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:34:15,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:15,490 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:34:15,544 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:15,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:15,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:34:15,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033962186] [2020-10-15 20:34:15,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:34:15,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:15,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:34:15,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:34:15,546 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:34:20,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:20,143 INFO L93 Difference]: Finished difference Result 135 states and 333 transitions. [2020-10-15 20:34:20,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 20:34:20,147 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:34:20,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:20,147 INFO L225 Difference]: With dead ends: 135 [2020-10-15 20:34:20,147 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 20:34:20,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1664, Invalid=4342, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 20:34:20,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 20:34:20,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-15 20:34:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:34:20,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:34:20,151 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:34:20,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:20,151 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:34:20,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:34:20,151 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:34:20,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:34:20,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:20,151 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:20,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:20,352 INFO L429 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:20,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:20,353 INFO L82 PathProgramCache]: Analyzing trace with hash -203896501, now seen corresponding path program 381 times [2020-10-15 20:34:20,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:20,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955885643] [2020-10-15 20:34:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:21,453 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:21,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955885643] [2020-10-15 20:34:21,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114548659] [2020-10-15 20:34:21,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:21,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 20:34:21,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:34:21,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:34:21,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:21,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:21,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:34:21,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550417285] [2020-10-15 20:34:21,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:34:21,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:21,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:34:21,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:34:21,595 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:34:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:25,948 INFO L93 Difference]: Finished difference Result 132 states and 327 transitions. [2020-10-15 20:34:25,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 20:34:25,952 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:34:25,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:25,952 INFO L225 Difference]: With dead ends: 132 [2020-10-15 20:34:25,952 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 20:34:25,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1685, Invalid=4167, Unknown=0, NotChecked=0, Total=5852 [2020-10-15 20:34:25,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 20:34:25,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 111. [2020-10-15 20:34:25,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:34:25,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:34:25,955 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:34:25,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:25,955 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:34:25,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:34:25,955 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:34:25,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:34:25,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:25,956 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:26,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:26,160 INFO L429 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:26,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1924024145, now seen corresponding path program 382 times [2020-10-15 20:34:26,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:26,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449415063] [2020-10-15 20:34:26,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:27,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449415063] [2020-10-15 20:34:27,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016918211] [2020-10-15 20:34:27,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:27,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:34:27,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:34:27,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:34:27,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:27,392 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:34:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:27,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:27,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:34:27,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554474700] [2020-10-15 20:34:27,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:34:27,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:27,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:34:27,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:34:27,443 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:34:32,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:32,441 INFO L93 Difference]: Finished difference Result 131 states and 325 transitions. [2020-10-15 20:34:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-15 20:34:32,447 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:34:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:32,448 INFO L225 Difference]: With dead ends: 131 [2020-10-15 20:34:32,448 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 20:34:32,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1814, Invalid=4506, Unknown=0, NotChecked=0, Total=6320 [2020-10-15 20:34:32,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 20:34:32,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2020-10-15 20:34:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:34:32,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:34:32,451 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:34:32,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:32,451 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:34:32,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:34:32,451 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:34:32,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:34:32,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:32,452 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:32,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:32,657 INFO L429 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:32,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:32,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1453028435, now seen corresponding path program 383 times [2020-10-15 20:34:32,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:32,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024201917] [2020-10-15 20:34:32,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:33,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024201917] [2020-10-15 20:34:33,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968106608] [2020-10-15 20:34:33,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:33,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-15 20:34:33,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:34:33,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:34:33,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:33,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:33,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:34:33,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784933723] [2020-10-15 20:34:33,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:34:33,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:33,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:34:33,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:34:33,788 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:34:37,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:37,813 INFO L93 Difference]: Finished difference Result 128 states and 319 transitions. [2020-10-15 20:34:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-15 20:34:37,816 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:34:37,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:37,817 INFO L225 Difference]: With dead ends: 128 [2020-10-15 20:34:37,817 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 20:34:37,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1844, Invalid=4318, Unknown=0, NotChecked=0, Total=6162 [2020-10-15 20:34:37,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 20:34:37,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2020-10-15 20:34:37,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 20:34:37,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-15 20:34:37,819 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-15 20:34:37,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:37,819 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-15 20:34:37,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:34:37,820 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-15 20:34:37,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:34:37,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:37,820 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:38,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:38,021 INFO L429 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:38,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:38,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1436941295, now seen corresponding path program 384 times [2020-10-15 20:34:38,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:38,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283273332] [2020-10-15 20:34:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:39,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283273332] [2020-10-15 20:34:39,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548170943] [2020-10-15 20:34:39,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:39,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 20:34:39,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:34:39,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:34:39,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:39,239 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:34:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:39,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:39,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:34:39,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088536589] [2020-10-15 20:34:39,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:34:39,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:39,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:34:39,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:34:39,293 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-15 20:34:44,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:44,924 INFO L93 Difference]: Finished difference Result 127 states and 317 transitions. [2020-10-15 20:34:44,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-15 20:34:44,928 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:34:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:44,929 INFO L225 Difference]: With dead ends: 127 [2020-10-15 20:34:44,929 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 20:34:44,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1980, Invalid=4662, Unknown=0, NotChecked=0, Total=6642 [2020-10-15 20:34:44,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 20:34:44,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2020-10-15 20:34:44,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 20:34:44,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-15 20:34:44,932 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-15 20:34:44,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:44,932 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-15 20:34:44,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:34:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-15 20:34:44,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:34:44,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:44,933 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:45,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:45,134 INFO L429 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:45,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:45,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1436451185, now seen corresponding path program 385 times [2020-10-15 20:34:45,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:45,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028372846] [2020-10-15 20:34:45,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:46,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028372846] [2020-10-15 20:34:46,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401639741] [2020-10-15 20:34:46,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:46,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:34:46,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:46,676 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:46,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:46,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-15 20:34:46,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617842113] [2020-10-15 20:34:46,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 20:34:46,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:46,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 20:34:46,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:34:46,678 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-15 20:34:51,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:51,541 INFO L93 Difference]: Finished difference Result 143 states and 357 transitions. [2020-10-15 20:34:51,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 20:34:51,546 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-15 20:34:51,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:51,546 INFO L225 Difference]: With dead ends: 143 [2020-10-15 20:34:51,546 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 20:34:51,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1767 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2019, Invalid=4461, Unknown=0, NotChecked=0, Total=6480 [2020-10-15 20:34:51,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 20:34:51,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 114. [2020-10-15 20:34:51,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 20:34:51,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 297 transitions. [2020-10-15 20:34:51,550 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 297 transitions. Word has length 34 [2020-10-15 20:34:51,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:51,550 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 297 transitions. [2020-10-15 20:34:51,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 20:34:51,550 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 297 transitions. [2020-10-15 20:34:51,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:34:51,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:51,551 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:51,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2020-10-15 20:34:51,751 INFO L429 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:51,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:51,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1436434445, now seen corresponding path program 386 times [2020-10-15 20:34:51,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:51,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221815689] [2020-10-15 20:34:51,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:52,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221815689] [2020-10-15 20:34:52,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986062481] [2020-10-15 20:34:52,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:52,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:34:52,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:34:52,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:34:52,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:53,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:53,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:34:53,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412216551] [2020-10-15 20:34:53,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:34:53,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:53,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:34:53,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:34:53,096 INFO L87 Difference]: Start difference. First operand 114 states and 297 transitions. Second operand 31 states. [2020-10-15 20:34:58,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:34:58,152 INFO L93 Difference]: Finished difference Result 122 states and 309 transitions. [2020-10-15 20:34:58,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-15 20:34:58,156 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:34:58,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:34:58,157 INFO L225 Difference]: With dead ends: 122 [2020-10-15 20:34:58,157 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 20:34:58,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1715 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1826, Invalid=4816, Unknown=0, NotChecked=0, Total=6642 [2020-10-15 20:34:58,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 20:34:58,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 81. [2020-10-15 20:34:58,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:34:58,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 198 transitions. [2020-10-15 20:34:58,159 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 198 transitions. Word has length 34 [2020-10-15 20:34:58,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:34:58,159 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 198 transitions. [2020-10-15 20:34:58,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:34:58,159 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 198 transitions. [2020-10-15 20:34:58,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 20:34:58,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:34:58,160 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:34:58,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2020-10-15 20:34:58,361 INFO L429 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:34:58,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:34:58,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1849519723, now seen corresponding path program 387 times [2020-10-15 20:34:58,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:34:58,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247174571] [2020-10-15 20:34:58,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:34:58,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:34:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:59,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247174571] [2020-10-15 20:34:59,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060791048] [2020-10-15 20:34:59,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:34:59,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-15 20:34:59,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:34:59,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-15 20:34:59,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:34:59,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:34:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:34:59,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:34:59,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-15 20:34:59,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205777978] [2020-10-15 20:34:59,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:34:59,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:34:59,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:34:59,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:34:59,759 INFO L87 Difference]: Start difference. First operand 81 states and 198 transitions. Second operand 31 states. [2020-10-15 20:35:04,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:35:04,874 INFO L93 Difference]: Finished difference Result 148 states and 363 transitions. [2020-10-15 20:35:04,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 20:35:04,878 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-15 20:35:04,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:35:04,879 INFO L225 Difference]: With dead ends: 148 [2020-10-15 20:35:04,879 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 20:35:04,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2233, Invalid=4739, Unknown=0, NotChecked=0, Total=6972 [2020-10-15 20:35:04,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 20:35:04,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 112. [2020-10-15 20:35:04,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-15 20:35:04,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 289 transitions. [2020-10-15 20:35:04,881 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 289 transitions. Word has length 34 [2020-10-15 20:35:04,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:35:04,882 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 289 transitions. [2020-10-15 20:35:04,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:35:04,882 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 289 transitions. [2020-10-15 20:35:04,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:35:04,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:35:04,882 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:35:05,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable388,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:05,083 INFO L429 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:35:05,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:35:05,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1579778528, now seen corresponding path program 388 times [2020-10-15 20:35:05,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:35:05,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223784549] [2020-10-15 20:35:05,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:35:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:06,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223784549] [2020-10-15 20:35:06,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773874934] [2020-10-15 20:35:06,224 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 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:06,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:35:06,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:35:06,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:35:06,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:35:06,352 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:35:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:06,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:35:06,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 20:35:06,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059828711] [2020-10-15 20:35:06,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:35:06,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:35:06,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:35:06,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:35:06,438 INFO L87 Difference]: Start difference. First operand 112 states and 289 transitions. Second operand 32 states. [2020-10-15 20:35:12,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:35:12,273 INFO L93 Difference]: Finished difference Result 120 states and 309 transitions. [2020-10-15 20:35:12,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 20:35:12,278 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 20:35:12,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:35:12,278 INFO L225 Difference]: With dead ends: 120 [2020-10-15 20:35:12,278 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 20:35:12,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=2255, Invalid=4885, Unknown=0, NotChecked=0, Total=7140 [2020-10-15 20:35:12,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 20:35:12,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2020-10-15 20:35:12,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:35:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 202 transitions. [2020-10-15 20:35:12,281 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 202 transitions. Word has length 35 [2020-10-15 20:35:12,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:35:12,281 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 202 transitions. [2020-10-15 20:35:12,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:35:12,281 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 202 transitions. [2020-10-15 20:35:12,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:35:12,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:35:12,282 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:35:12,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2020-10-15 20:35:12,484 INFO L429 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:35:12,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:35:12,484 INFO L82 PathProgramCache]: Analyzing trace with hash -484633973, now seen corresponding path program 389 times [2020-10-15 20:35:12,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:35:12,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555710355] [2020-10-15 20:35:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:35:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:14,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555710355] [2020-10-15 20:35:14,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067228665] [2020-10-15 20:35:14,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:14,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-15 20:35:14,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:35:14,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:35:14,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:35:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:14,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:35:14,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 20:35:14,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035799220] [2020-10-15 20:35:14,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:35:14,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:35:14,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:35:14,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:35:14,194 INFO L87 Difference]: Start difference. First operand 82 states and 202 transitions. Second operand 31 states. [2020-10-15 20:35:16,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:35:16,477 INFO L93 Difference]: Finished difference Result 126 states and 293 transitions. [2020-10-15 20:35:16,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:35:16,482 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 20:35:16,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:35:16,482 INFO L225 Difference]: With dead ends: 126 [2020-10-15 20:35:16,482 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 20:35:16,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1053, Invalid=2253, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:35:16,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 20:35:16,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 90. [2020-10-15 20:35:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 20:35:16,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 221 transitions. [2020-10-15 20:35:16,485 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 221 transitions. Word has length 35 [2020-10-15 20:35:16,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:35:16,485 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 221 transitions. [2020-10-15 20:35:16,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:35:16,486 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 221 transitions. [2020-10-15 20:35:16,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:35:16,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:35:16,486 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:35:16,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:16,687 INFO L429 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:35:16,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:35:16,687 INFO L82 PathProgramCache]: Analyzing trace with hash -603414801, now seen corresponding path program 390 times [2020-10-15 20:35:16,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:35:16,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956693569] [2020-10-15 20:35:16,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:35:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:18,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956693569] [2020-10-15 20:35:18,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864272057] [2020-10-15 20:35:18,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:18,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-10-15 20:35:18,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:35:18,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:35:18,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:35:18,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:35:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:18,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:35:18,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 20:35:18,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266648358] [2020-10-15 20:35:18,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:35:18,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:35:18,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:35:18,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:35:18,703 INFO L87 Difference]: Start difference. First operand 90 states and 221 transitions. Second operand 32 states. [2020-10-15 20:35:21,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:35:21,632 INFO L93 Difference]: Finished difference Result 154 states and 349 transitions. [2020-10-15 20:35:21,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:35:21,635 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 20:35:21,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:35:21,635 INFO L225 Difference]: With dead ends: 154 [2020-10-15 20:35:21,635 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 20:35:21,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1062, Invalid=2478, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:35:21,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 20:35:21,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 88. [2020-10-15 20:35:21,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 20:35:21,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 217 transitions. [2020-10-15 20:35:21,637 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 217 transitions. Word has length 35 [2020-10-15 20:35:21,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:35:21,638 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 217 transitions. [2020-10-15 20:35:21,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:35:21,638 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 217 transitions. [2020-10-15 20:35:21,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:35:21,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:35:21,638 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:35:21,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable391 [2020-10-15 20:35:21,839 INFO L429 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:35:21,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:35:21,839 INFO L82 PathProgramCache]: Analyzing trace with hash 193462125, now seen corresponding path program 391 times [2020-10-15 20:35:21,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:35:21,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543969940] [2020-10-15 20:35:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:35:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:23,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543969940] [2020-10-15 20:35:23,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380082785] [2020-10-15 20:35:23,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:23,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:35:23,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:35:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:23,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:35:23,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 20:35:23,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853011306] [2020-10-15 20:35:23,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:35:23,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:35:23,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:35:23,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:35:23,494 INFO L87 Difference]: Start difference. First operand 88 states and 217 transitions. Second operand 31 states. [2020-10-15 20:35:26,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:35:26,237 INFO L93 Difference]: Finished difference Result 155 states and 353 transitions. [2020-10-15 20:35:26,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:35:26,240 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 20:35:26,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:35:26,240 INFO L225 Difference]: With dead ends: 155 [2020-10-15 20:35:26,240 INFO L226 Difference]: Without dead ends: 149 [2020-10-15 20:35:26,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1061, Invalid=2599, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:35:26,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-15 20:35:26,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 91. [2020-10-15 20:35:26,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 20:35:26,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 225 transitions. [2020-10-15 20:35:26,242 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 225 transitions. Word has length 35 [2020-10-15 20:35:26,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:35:26,242 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 225 transitions. [2020-10-15 20:35:26,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:35:26,242 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 225 transitions. [2020-10-15 20:35:26,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:35:26,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:35:26,242 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:35:26,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:26,443 INFO L429 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:35:26,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:35:26,444 INFO L82 PathProgramCache]: Analyzing trace with hash -235711279, now seen corresponding path program 392 times [2020-10-15 20:35:26,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:35:26,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428981939] [2020-10-15 20:35:26,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:35:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:27,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428981939] [2020-10-15 20:35:27,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015341281] [2020-10-15 20:35:27,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:27,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:35:27,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:35:27,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:35:27,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:35:28,066 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:35:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:28,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:35:28,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 20:35:28,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773400255] [2020-10-15 20:35:28,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:35:28,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:35:28,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:35:28,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:35:28,097 INFO L87 Difference]: Start difference. First operand 91 states and 225 transitions. Second operand 32 states. [2020-10-15 20:35:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:35:30,876 INFO L93 Difference]: Finished difference Result 179 states and 401 transitions. [2020-10-15 20:35:30,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:35:30,881 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 20:35:30,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:35:30,882 INFO L225 Difference]: With dead ends: 179 [2020-10-15 20:35:30,882 INFO L226 Difference]: Without dead ends: 173 [2020-10-15 20:35:30,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1105, Invalid=2801, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:35:30,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-15 20:35:30,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 90. [2020-10-15 20:35:30,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 20:35:30,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 223 transitions. [2020-10-15 20:35:30,884 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 223 transitions. Word has length 35 [2020-10-15 20:35:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:35:30,884 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 223 transitions. [2020-10-15 20:35:30,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:35:30,884 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 223 transitions. [2020-10-15 20:35:30,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:35:30,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:35:30,885 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:35:31,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,390 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:31,086 INFO L429 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:35:31,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:35:31,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1244445903, now seen corresponding path program 393 times [2020-10-15 20:35:31,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:35:31,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951985805] [2020-10-15 20:35:31,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:35:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:32,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951985805] [2020-10-15 20:35:32,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553624091] [2020-10-15 20:35:32,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:32,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-10-15 20:35:32,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:35:32,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:35:32,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:35:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:33,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:35:33,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 20:35:33,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64199875] [2020-10-15 20:35:33,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:35:33,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:35:33,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:35:33,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:35:33,018 INFO L87 Difference]: Start difference. First operand 90 states and 223 transitions. Second operand 31 states. [2020-10-15 20:35:36,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:35:36,203 INFO L93 Difference]: Finished difference Result 179 states and 403 transitions. [2020-10-15 20:35:36,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:35:36,207 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-15 20:35:36,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:35:36,208 INFO L225 Difference]: With dead ends: 179 [2020-10-15 20:35:36,208 INFO L226 Difference]: Without dead ends: 173 [2020-10-15 20:35:36,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1118, Invalid=2914, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 20:35:36,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-15 20:35:36,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 93. [2020-10-15 20:35:36,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:35:36,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 231 transitions. [2020-10-15 20:35:36,211 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 231 transitions. Word has length 35 [2020-10-15 20:35:36,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:35:36,211 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 231 transitions. [2020-10-15 20:35:36,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 20:35:36,211 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 231 transitions. [2020-10-15 20:35:36,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:35:36,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:35:36,211 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:35:36,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:36,412 INFO L429 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:35:36,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:35:36,413 INFO L82 PathProgramCache]: Analyzing trace with hash -579462349, now seen corresponding path program 394 times [2020-10-15 20:35:36,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:35:36,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252377604] [2020-10-15 20:35:36,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:35:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:38,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252377604] [2020-10-15 20:35:38,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3297696] [2020-10-15 20:35:38,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:38,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:35:38,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:35:38,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:35:38,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:35:38,216 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:35:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:38,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:35:38,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-15 20:35:38,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755005898] [2020-10-15 20:35:38,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 20:35:38,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:35:38,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 20:35:38,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:35:38,258 INFO L87 Difference]: Start difference. First operand 93 states and 231 transitions. Second operand 32 states. [2020-10-15 20:35:41,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:35:41,475 INFO L93 Difference]: Finished difference Result 176 states and 397 transitions. [2020-10-15 20:35:41,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:35:41,480 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-15 20:35:41,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:35:41,480 INFO L225 Difference]: With dead ends: 176 [2020-10-15 20:35:41,481 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 20:35:41,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1118, Invalid=3042, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 20:35:41,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 20:35:41,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 92. [2020-10-15 20:35:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:35:41,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 229 transitions. [2020-10-15 20:35:41,483 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 229 transitions. Word has length 35 [2020-10-15 20:35:41,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:35:41,483 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 229 transitions. [2020-10-15 20:35:41,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 20:35:41,483 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 229 transitions. [2020-10-15 20:35:41,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 20:35:41,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:35:41,484 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:35:41,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:41,684 INFO L429 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:35:41,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:35:41,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1404736847, now seen corresponding path program 395 times [2020-10-15 20:35:41,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:35:41,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666005425] [2020-10-15 20:35:41,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:35:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:35:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:43,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666005425] [2020-10-15 20:35:43,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749490978] [2020-10-15 20:35:43,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:43,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-15 20:35:43,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:35:43,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-15 20:35:43,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:35:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:35:43,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:35:43,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-15 20:35:43,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081389130] [2020-10-15 20:35:43,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 20:35:43,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:35:43,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 20:35:43,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:35:43,197 INFO L87 Difference]: Start difference. First operand 92 states and 229 transitions. Second operand 31 states. Received shutdown request... [2020-10-15 20:35:46,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:35:46,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:35:46,662 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-15 20:35:46,668 WARN L235 ceAbstractionStarter]: Timeout [2020-10-15 20:35:46,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:35:46 BasicIcfg [2020-10-15 20:35:46,669 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 20:35:46,671 INFO L168 Benchmark]: Toolchain (without parser) took 850498.53 ms. Allocated memory was 253.8 MB in the beginning and 224.9 MB in the end (delta: -28.8 MB). Free memory was 209.3 MB in the beginning and 142.6 MB in the end (delta: 66.7 MB). Peak memory consumption was 37.8 MB. Max. memory is 14.2 GB. [2020-10-15 20:35:46,672 INFO L168 Benchmark]: CDTParser took 0.50 ms. Allocated memory is still 253.8 MB. Free memory is still 230.1 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 20:35:46,672 INFO L168 Benchmark]: CACSL2BoogieTranslator took 710.98 ms. Allocated memory was 253.8 MB in the beginning and 321.9 MB in the end (delta: 68.2 MB). Free memory was 209.3 MB in the beginning and 278.4 MB in the end (delta: -69.2 MB). Peak memory consumption was 30.1 MB. Max. memory is 14.2 GB. [2020-10-15 20:35:46,672 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.89 ms. Allocated memory is still 321.9 MB. Free memory was 278.4 MB in the beginning and 275.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 20:35:46,673 INFO L168 Benchmark]: Boogie Preprocessor took 32.62 ms. Allocated memory is still 321.9 MB. Free memory was 275.9 MB in the beginning and 273.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 20:35:46,673 INFO L168 Benchmark]: RCFGBuilder took 454.72 ms. Allocated memory is still 321.9 MB. Free memory was 273.4 MB in the beginning and 254.1 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. [2020-10-15 20:35:46,674 INFO L168 Benchmark]: TraceAbstraction took 849241.54 ms. Allocated memory was 321.9 MB in the beginning and 224.9 MB in the end (delta: -97.0 MB). Free memory was 254.1 MB in the beginning and 142.6 MB in the end (delta: 111.4 MB). Peak memory consumption was 14.5 MB. Max. memory is 14.2 GB. [2020-10-15 20:35:46,678 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50 ms. Allocated memory is still 253.8 MB. Free memory is still 230.1 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 710.98 ms. Allocated memory was 253.8 MB in the beginning and 321.9 MB in the end (delta: 68.2 MB). Free memory was 209.3 MB in the beginning and 278.4 MB in the end (delta: -69.2 MB). Peak memory consumption was 30.1 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 50.89 ms. Allocated memory is still 321.9 MB. Free memory was 278.4 MB in the beginning and 275.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 32.62 ms. Allocated memory is still 321.9 MB. Free memory was 275.9 MB in the beginning and 273.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 454.72 ms. Allocated memory is still 321.9 MB. Free memory was 273.4 MB in the beginning and 254.1 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 849241.54 ms. Allocated memory was 321.9 MB in the beginning and 224.9 MB in the end (delta: -97.0 MB). Free memory was 254.1 MB in the beginning and 142.6 MB in the end (delta: 111.4 MB). Peak memory consumption was 14.5 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 618 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.3s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while BasicCegarLoop was constructing difference of abstraction (92states) and FLOYD_HOARE automaton (currently 40 states, 31 states before enhancement),while ReachableStatesComputation was computing reachable states (165 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 849.1s, OverallIterations: 397, TraceHistogramMax: 14, AutomataDifference: 553.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 6375 SDtfs, 26931 SDslu, 48281 SDs, 0 SdLazy, 54975 SolverSat, 38430 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 61.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28316 GetRequests, 9072 SyntacticMatches, 392 SemanticMatches, 18852 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252790 ImplicationChecksByTransitivity, 608.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=387, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 396 MinimizatonAttempts, 12489 StatesRemovedByMinimization, 395 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.1s SsaConstructionTime, 10.0s SatisfiabilityAnalysisTime, 187.7s InterpolantComputationTime, 20172 NumberOfCodeBlocks, 20172 NumberOfCodeBlocksAsserted, 2506 NumberOfCheckSat, 19383 ConstructedInterpolants, 0 QuantifiedInterpolants, 2365955 SizeOfPredicates, 6928 NumberOfNonLiveVariables, 59728 ConjunctsInSsa, 8507 ConjunctsInUnsatCore, 789 InterpolantComputations, 5 PerfectInterpolantSequences, 0/62244 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown