/usr/bin/java -Xmx8000000000 -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/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/indexer.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 11:36:58,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 11:36:58,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 11:36:58,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 11:36:58,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 11:36:58,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 11:36:58,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 11:36:58,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 11:36:58,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 11:36:58,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 11:36:58,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 11:36:58,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 11:36:58,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 11:36:58,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 11:36:58,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 11:36:58,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 11:36:58,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 11:36:58,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 11:36:58,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 11:36:58,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 11:36:58,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 11:36:58,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 11:36:58,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 11:36:58,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 11:36:58,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 11:36:58,761 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 11:36:58,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 11:36:58,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 11:36:58,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 11:36:58,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 11:36:58,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 11:36:58,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 11:36:58,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 11:36:58,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 11:36:58,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 11:36:58,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 11:36:58,771 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-10-16 11:36:58,813 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 11:36:58,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 11:36:58,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 11:36:58,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 11:36:58,817 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 11:36:58,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 11:36:58,817 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 11:36:58,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 11:36:58,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 11:36:58,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 11:36:58,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 11:36:58,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 11:36:58,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 11:36:58,820 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 11:36:58,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 11:36:58,820 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 11:36:58,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 11:36:58,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 11:36:58,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 11:36:58,821 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 11:36:58,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 11:36:58,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 11:36:58,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 11:36:58,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-16 11:36:58,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 11:36:58,822 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 11:36:58,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 11:36:58,823 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-16 11:36:58,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 11:36:59,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 11:36:59,136 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 11:36:59,139 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 11:36:59,141 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 11:36:59,141 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 11:36:59,142 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/indexer.i [2020-10-16 11:36:59,209 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e142caf01/af92b25680d44547b42645e0dd705803/FLAGed427cbc7 [2020-10-16 11:36:59,811 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 11:36:59,812 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/indexer.i [2020-10-16 11:36:59,832 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e142caf01/af92b25680d44547b42645e0dd705803/FLAGed427cbc7 [2020-10-16 11:37:00,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e142caf01/af92b25680d44547b42645e0dd705803 [2020-10-16 11:37:00,032 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 11:37:00,033 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 11:37:00,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 11:37:00,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 11:37:00,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 11:37:00,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17f1cf33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00, skipping insertion in model container [2020-10-16 11:37:00,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 11:37:00,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 11:37:00,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:37:00,870 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 11:37:00,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:37:01,120 INFO L208 MainTranslator]: Completed translation [2020-10-16 11:37:01,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:01 WrapperNode [2020-10-16 11:37:01,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 11:37:01,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 11:37:01,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 11:37:01,124 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 11:37:01,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:01" (1/1) ... [2020-10-16 11:37:01,186 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:01" (1/1) ... [2020-10-16 11:37:01,233 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 11:37:01,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 11:37:01,235 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 11:37:01,235 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 11:37:01,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:01" (1/1) ... [2020-10-16 11:37:01,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:01" (1/1) ... [2020-10-16 11:37:01,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:01" (1/1) ... [2020-10-16 11:37:01,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:01" (1/1) ... [2020-10-16 11:37:01,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:01" (1/1) ... [2020-10-16 11:37:01,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:01" (1/1) ... [2020-10-16 11:37:01,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:01" (1/1) ... [2020-10-16 11:37:01,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 11:37:01,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 11:37:01,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 11:37:01,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 11:37:01,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:01,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 11:37:01,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 11:37:01,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-16 11:37:01,384 INFO L130 BoogieDeclarations]: Found specification of procedure thread_routine [2020-10-16 11:37:01,384 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_routine [2020-10-16 11:37:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 11:37:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-10-16 11:37:01,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 11:37:01,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 11:37:01,388 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 11:37:01,853 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 11:37:01,854 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-16 11:37:01,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:37:01 BoogieIcfgContainer [2020-10-16 11:37:01,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 11:37:01,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 11:37:01,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 11:37:01,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 11:37:01,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 11:37:00" (1/3) ... [2020-10-16 11:37:01,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4c0e48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:37:01, skipping insertion in model container [2020-10-16 11:37:01,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:01" (2/3) ... [2020-10-16 11:37:01,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4c0e48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:37:01, skipping insertion in model container [2020-10-16 11:37:01,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:37:01" (3/3) ... [2020-10-16 11:37:01,867 INFO L111 eAbstractionObserver]: Analyzing ICFG indexer.i [2020-10-16 11:37:01,881 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 11:37:01,881 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-16 11:37:01,890 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 11:37:01,891 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 11:37:01,924 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,925 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,925 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,925 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,926 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,926 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,926 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,927 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,927 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,927 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,927 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,927 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,928 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,928 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,928 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,929 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,929 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,929 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,929 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,930 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,930 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,930 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,930 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,930 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,931 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,931 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,931 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,931 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,932 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,932 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,933 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,933 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,933 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,933 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,933 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,934 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,934 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,934 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,934 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,935 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,935 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,935 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,935 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,935 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,936 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,936 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,936 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,936 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,937 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,937 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,937 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,937 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,938 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,938 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,938 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,938 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,939 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,939 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,939 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,940 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,940 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,940 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,940 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,940 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,941 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,941 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,941 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,941 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,942 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,942 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,942 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,943 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,943 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,943 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,943 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,944 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,944 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,944 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,944 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,945 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,945 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,945 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,945 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,946 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,946 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,946 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,946 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,950 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,951 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,951 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,951 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,952 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,952 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,952 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,952 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,952 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,953 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,953 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,953 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,953 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,954 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,954 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,954 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,954 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,955 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,955 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,955 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,955 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,956 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,956 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,956 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,957 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,966 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2020-10-16 11:37:01,981 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 11:37:02,016 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:37:02,016 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:37:02,017 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 11:37:02,017 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:37:02,017 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:37:02,017 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:37:02,017 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:37:02,017 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:37:02,033 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 11:37:02,034 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 105 transitions, 218 flow [2020-10-16 11:37:02,036 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 105 transitions, 218 flow [2020-10-16 11:37:02,038 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions, 218 flow [2020-10-16 11:37:02,100 INFO L129 PetriNetUnfolder]: 18/126 cut-off events. [2020-10-16 11:37:02,100 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2020-10-16 11:37:02,107 INFO L80 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 126 events. 18/126 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 204 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2020-10-16 11:37:02,112 INFO L117 LiptonReduction]: Number of co-enabled transitions 2652 [2020-10-16 11:37:04,125 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-16 11:37:04,291 INFO L132 LiptonReduction]: Checked pairs total: 2598 [2020-10-16 11:37:04,292 INFO L134 LiptonReduction]: Total number of compositions: 97 [2020-10-16 11:37:04,298 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 25 transitions, 58 flow [2020-10-16 11:37:04,311 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 73 states. [2020-10-16 11:37:04,313 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-10-16 11:37:04,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-16 11:37:04,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:04,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:04,321 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:37:04,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:04,327 INFO L82 PathProgramCache]: Analyzing trace with hash -734709978, now seen corresponding path program 1 times [2020-10-16 11:37:04,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:04,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589393199] [2020-10-16 11:37:04,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:04,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589393199] [2020-10-16 11:37:04,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:04,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 11:37:04,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944256262] [2020-10-16 11:37:04,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 11:37:04,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:04,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 11:37:04,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 11:37:04,566 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 3 states. [2020-10-16 11:37:04,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:04,622 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2020-10-16 11:37:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 11:37:04,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-10-16 11:37:04,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:04,636 INFO L225 Difference]: With dead ends: 61 [2020-10-16 11:37:04,637 INFO L226 Difference]: Without dead ends: 53 [2020-10-16 11:37:04,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 11:37:04,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-16 11:37:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-16 11:37:04,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 11:37:04,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 108 transitions. [2020-10-16 11:37:04,683 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 108 transitions. Word has length 7 [2020-10-16 11:37:04,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:04,683 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 108 transitions. [2020-10-16 11:37:04,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 11:37:04,684 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 108 transitions. [2020-10-16 11:37:04,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 11:37:04,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:04,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:04,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 11:37:04,685 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:37:04,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:04,685 INFO L82 PathProgramCache]: Analyzing trace with hash 654852975, now seen corresponding path program 1 times [2020-10-16 11:37:04,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:04,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354219998] [2020-10-16 11:37:04,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:04,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:04,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354219998] [2020-10-16 11:37:04,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763092979] [2020-10-16 11:37:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:04,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-16 11:37:04,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:04,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:04,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 11:37:04,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31725783] [2020-10-16 11:37:04,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:04,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:04,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:04,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:04,888 INFO L87 Difference]: Start difference. First operand 53 states and 108 transitions. Second operand 6 states. [2020-10-16 11:37:04,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:04,926 INFO L93 Difference]: Finished difference Result 42 states and 81 transitions. [2020-10-16 11:37:04,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:37:04,927 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-10-16 11:37:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:04,928 INFO L225 Difference]: With dead ends: 42 [2020-10-16 11:37:04,929 INFO L226 Difference]: Without dead ends: 42 [2020-10-16 11:37:04,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:04,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-16 11:37:04,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-16 11:37:04,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:37:04,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2020-10-16 11:37:04,936 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 8 [2020-10-16 11:37:04,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:04,936 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2020-10-16 11:37:04,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:04,937 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2020-10-16 11:37:04,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 11:37:04,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:04,937 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:05,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-16 11:37:05,151 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:37:05,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:05,152 INFO L82 PathProgramCache]: Analyzing trace with hash 781631558, now seen corresponding path program 2 times [2020-10-16 11:37:05,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:05,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727411408] [2020-10-16 11:37:05,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:05,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727411408] [2020-10-16 11:37:05,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214070603] [2020-10-16 11:37:05,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:05,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-16 11:37:05,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:05,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:37:05,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:05,366 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2020-10-16 11:37:05,369 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 11:37:05,395 INFO L625 ElimStorePlain]: treesize reduction 40, result has 24.5 percent of original size [2020-10-16 11:37:05,398 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-16 11:37:05,399 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:4 [2020-10-16 11:37:05,431 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-16 11:37:05,432 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 11:37:05,438 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 11:37:05,439 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 11:37:05,439 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-10-16 11:37:05,474 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-10-16 11:37:05,475 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 11:37:05,482 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 11:37:05,485 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-16 11:37:05,485 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:27 [2020-10-16 11:37:05,565 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-10-16 11:37:05,567 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 11:37:05,573 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 11:37:05,575 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 11:37:05,575 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:37, output treesize:7 [2020-10-16 11:37:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:37:05,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 11:37:05,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 10 [2020-10-16 11:37:05,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606129599] [2020-10-16 11:37:05,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:37:05,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:05,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:37:05,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:05,594 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand 8 states. [2020-10-16 11:37:13,765 WARN L193 SmtUtils]: Spent 8.10 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-10-16 11:37:21,865 WARN L193 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-16 11:37:38,007 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-16 11:37:44,098 WARN L193 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-16 11:38:05,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:05,597 INFO L93 Difference]: Finished difference Result 114 states and 235 transitions. [2020-10-16 11:38:05,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:38:05,599 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2020-10-16 11:38:05,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:05,603 INFO L225 Difference]: With dead ends: 114 [2020-10-16 11:38:05,605 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 11:38:05,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=112, Invalid=301, Unknown=7, NotChecked=0, Total=420 [2020-10-16 11:38:05,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 11:38:05,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 57. [2020-10-16 11:38:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:38:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 119 transitions. [2020-10-16 11:38:05,628 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 119 transitions. Word has length 9 [2020-10-16 11:38:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:05,628 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 119 transitions. [2020-10-16 11:38:05,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:38:05,628 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 119 transitions. [2020-10-16 11:38:05,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:38:05,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:05,632 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:05,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:05,846 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:05,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:05,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1539252056, now seen corresponding path program 1 times [2020-10-16 11:38:05,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:05,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786564913] [2020-10-16 11:38:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:05,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786564913] [2020-10-16 11:38:05,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197619842] [2020-10-16 11:38:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:05,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 11:38:05,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:06,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:06,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-16 11:38:06,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055632980] [2020-10-16 11:38:06,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 11:38:06,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:06,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 11:38:06,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:38:06,007 INFO L87 Difference]: Start difference. First operand 57 states and 119 transitions. Second operand 7 states. [2020-10-16 11:38:06,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:06,034 INFO L93 Difference]: Finished difference Result 58 states and 120 transitions. [2020-10-16 11:38:06,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:38:06,035 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-10-16 11:38:06,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:06,036 INFO L225 Difference]: With dead ends: 58 [2020-10-16 11:38:06,036 INFO L226 Difference]: Without dead ends: 58 [2020-10-16 11:38:06,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:38:06,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-16 11:38:06,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-16 11:38:06,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:38:06,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 120 transitions. [2020-10-16 11:38:06,043 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 120 transitions. Word has length 10 [2020-10-16 11:38:06,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:06,043 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 120 transitions. [2020-10-16 11:38:06,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 11:38:06,044 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 120 transitions. [2020-10-16 11:38:06,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:38:06,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:06,044 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:06,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:06,258 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:06,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:06,259 INFO L82 PathProgramCache]: Analyzing trace with hash 35881919, now seen corresponding path program 2 times [2020-10-16 11:38:06,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:06,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615632039] [2020-10-16 11:38:06,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:06,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615632039] [2020-10-16 11:38:06,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474727285] [2020-10-16 11:38:06,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:06,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-16 11:38:06,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:06,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:38:06,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:06,401 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 81 [2020-10-16 11:38:06,403 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 11:38:06,436 INFO L625 ElimStorePlain]: treesize reduction 65, result has 16.7 percent of original size [2020-10-16 11:38:06,438 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-16 11:38:06,439 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:4 [2020-10-16 11:38:06,459 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-16 11:38:06,459 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 11:38:06,465 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 11:38:06,465 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 11:38:06,466 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-10-16 11:38:06,493 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-10-16 11:38:06,494 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 11:38:06,499 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 11:38:06,502 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-16 11:38:06,503 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:27 [2020-10-16 11:38:06,575 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-10-16 11:38:06,577 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 11:38:06,583 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 11:38:06,585 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 11:38:06,585 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:37, output treesize:7 [2020-10-16 11:38:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 11:38:06,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 11:38:06,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 11 [2020-10-16 11:38:06,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899844494] [2020-10-16 11:38:06,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:38:06,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:06,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:38:06,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:38:06,603 INFO L87 Difference]: Start difference. First operand 58 states and 120 transitions. Second operand 8 states. [2020-10-16 11:38:14,733 WARN L193 SmtUtils]: Spent 8.05 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-10-16 11:38:22,812 WARN L193 SmtUtils]: Spent 8.06 s on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-16 11:38:26,879 WARN L193 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-16 11:38:31,106 WARN L193 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-16 11:38:39,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:39,642 INFO L93 Difference]: Finished difference Result 137 states and 289 transitions. [2020-10-16 11:38:39,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:38:39,652 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 11:38:39,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:39,654 INFO L225 Difference]: With dead ends: 137 [2020-10-16 11:38:39,654 INFO L226 Difference]: Without dead ends: 137 [2020-10-16 11:38:39,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:38:39,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-16 11:38:39,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 53. [2020-10-16 11:38:39,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 11:38:39,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 107 transitions. [2020-10-16 11:38:39,662 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 107 transitions. Word has length 11 [2020-10-16 11:38:39,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:39,663 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 107 transitions. [2020-10-16 11:38:39,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:38:39,663 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 107 transitions. [2020-10-16 11:38:39,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:38:39,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:39,664 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:39,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:39,874 INFO L429 AbstractCegarLoop]: === Iteration 6 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:39,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:39,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1112297535, now seen corresponding path program 3 times [2020-10-16 11:38:39,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:39,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125946187] [2020-10-16 11:38:39,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 11:38:39,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125946187] [2020-10-16 11:38:39,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597750951] [2020-10-16 11:38:39,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:40,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:38:40,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:40,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:38:40,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:40,050 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-16 11:38:40,050 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 11:38:40,054 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 11:38:40,054 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 11:38:40,055 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2020-10-16 11:38:40,072 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-10-16 11:38:40,073 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 11:38:40,077 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 11:38:40,078 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 11:38:40,078 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2020-10-16 11:38:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 11:38:40,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 11:38:40,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 11 [2020-10-16 11:38:40,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13630139] [2020-10-16 11:38:40,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 11:38:40,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:40,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 11:38:40,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:38:40,092 INFO L87 Difference]: Start difference. First operand 53 states and 107 transitions. Second operand 7 states. [2020-10-16 11:38:40,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:40,249 INFO L93 Difference]: Finished difference Result 73 states and 149 transitions. [2020-10-16 11:38:40,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:38:40,250 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-10-16 11:38:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:40,251 INFO L225 Difference]: With dead ends: 73 [2020-10-16 11:38:40,251 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 11:38:40,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:38:40,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 11:38:40,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 48. [2020-10-16 11:38:40,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 11:38:40,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 94 transitions. [2020-10-16 11:38:40,260 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 94 transitions. Word has length 12 [2020-10-16 11:38:40,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:40,263 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 94 transitions. [2020-10-16 11:38:40,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 11:38:40,263 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 94 transitions. [2020-10-16 11:38:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:38:40,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:40,264 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:40,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 11:38:40,465 INFO L429 AbstractCegarLoop]: === Iteration 7 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:40,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:40,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1112290712, now seen corresponding path program 1 times [2020-10-16 11:38:40,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:40,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104333852] [2020-10-16 11:38:40,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:40,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104333852] [2020-10-16 11:38:40,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367985003] [2020-10-16 11:38:40,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:40,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 11:38:40,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:40,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:40,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-10-16 11:38:40,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405102186] [2020-10-16 11:38:40,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:38:40,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:40,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:38:40,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:38:40,601 INFO L87 Difference]: Start difference. First operand 48 states and 94 transitions. Second operand 8 states. [2020-10-16 11:38:40,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:40,629 INFO L93 Difference]: Finished difference Result 49 states and 95 transitions. [2020-10-16 11:38:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 11:38:40,630 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-16 11:38:40,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:40,631 INFO L225 Difference]: With dead ends: 49 [2020-10-16 11:38:40,631 INFO L226 Difference]: Without dead ends: 49 [2020-10-16 11:38:40,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:38:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-16 11:38:40,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-16 11:38:40,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 11:38:40,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 95 transitions. [2020-10-16 11:38:40,636 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 95 transitions. Word has length 12 [2020-10-16 11:38:40,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:40,636 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 95 transitions. [2020-10-16 11:38:40,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:38:40,637 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 95 transitions. [2020-10-16 11:38:40,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:40,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:40,638 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:40,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:40,850 INFO L429 AbstractCegarLoop]: === Iteration 8 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:40,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:40,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1307414801, now seen corresponding path program 2 times [2020-10-16 11:38:40,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:40,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683072058] [2020-10-16 11:38:40,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:40,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683072058] [2020-10-16 11:38:40,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989531393] [2020-10-16 11:38:40,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:40,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:38:40,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:40,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 11:38:40,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:40,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:40,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-10-16 11:38:40,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053406617] [2020-10-16 11:38:40,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:38:40,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:40,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:38:40,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:38:40,989 INFO L87 Difference]: Start difference. First operand 49 states and 95 transitions. Second operand 9 states. [2020-10-16 11:38:41,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:41,016 INFO L93 Difference]: Finished difference Result 50 states and 96 transitions. [2020-10-16 11:38:41,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:38:41,016 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 11:38:41,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:41,017 INFO L225 Difference]: With dead ends: 50 [2020-10-16 11:38:41,017 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 11:38:41,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:38:41,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 11:38:41,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-16 11:38:41,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:38:41,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 96 transitions. [2020-10-16 11:38:41,022 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 96 transitions. Word has length 13 [2020-10-16 11:38:41,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:41,022 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 96 transitions. [2020-10-16 11:38:41,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:38:41,023 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 96 transitions. [2020-10-16 11:38:41,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:38:41,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:41,024 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:41,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:41,235 INFO L429 AbstractCegarLoop]: === Iteration 9 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:41,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:41,236 INFO L82 PathProgramCache]: Analyzing trace with hash 991125624, now seen corresponding path program 3 times [2020-10-16 11:38:41,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:41,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090571782] [2020-10-16 11:38:41,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:41,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090571782] [2020-10-16 11:38:41,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775309115] [2020-10-16 11:38:41,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:41,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:38:41,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:41,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:38:41,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:41,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:41,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-10-16 11:38:41,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123516556] [2020-10-16 11:38:41,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:38:41,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:41,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:38:41,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=47, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:38:41,395 INFO L87 Difference]: Start difference. First operand 50 states and 96 transitions. Second operand 10 states. [2020-10-16 11:38:41,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:41,422 INFO L93 Difference]: Finished difference Result 51 states and 97 transitions. [2020-10-16 11:38:41,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:38:41,423 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 11:38:41,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:41,424 INFO L225 Difference]: With dead ends: 51 [2020-10-16 11:38:41,424 INFO L226 Difference]: Without dead ends: 51 [2020-10-16 11:38:41,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=47, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:38:41,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-16 11:38:41,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-16 11:38:41,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 11:38:41,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 97 transitions. [2020-10-16 11:38:41,429 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 97 transitions. Word has length 14 [2020-10-16 11:38:41,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:41,430 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 97 transitions. [2020-10-16 11:38:41,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:38:41,446 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 97 transitions. [2020-10-16 11:38:41,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:38:41,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:41,447 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:41,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-16 11:38:41,650 INFO L429 AbstractCegarLoop]: === Iteration 10 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:41,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:41,651 INFO L82 PathProgramCache]: Analyzing trace with hash -768565233, now seen corresponding path program 4 times [2020-10-16 11:38:41,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:41,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936163544] [2020-10-16 11:38:41,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:41,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936163544] [2020-10-16 11:38:41,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456607191] [2020-10-16 11:38:41,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:41,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:38:41,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:41,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:38:41,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:41,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:41,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-10-16 11:38:41,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033161516] [2020-10-16 11:38:41,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:38:41,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:41,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:38:41,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=57, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:38:41,817 INFO L87 Difference]: Start difference. First operand 51 states and 97 transitions. Second operand 11 states. [2020-10-16 11:38:41,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:41,844 INFO L93 Difference]: Finished difference Result 52 states and 98 transitions. [2020-10-16 11:38:41,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:38:41,846 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:38:41,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:41,846 INFO L225 Difference]: With dead ends: 52 [2020-10-16 11:38:41,846 INFO L226 Difference]: Without dead ends: 52 [2020-10-16 11:38:41,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=57, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:38:41,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-16 11:38:41,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-16 11:38:41,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:38:41,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 98 transitions. [2020-10-16 11:38:41,851 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 98 transitions. Word has length 15 [2020-10-16 11:38:41,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:41,852 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 98 transitions. [2020-10-16 11:38:41,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:38:41,852 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 98 transitions. [2020-10-16 11:38:41,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:38:41,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:41,853 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:42,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:42,064 INFO L429 AbstractCegarLoop]: === Iteration 11 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:42,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:42,065 INFO L82 PathProgramCache]: Analyzing trace with hash 515593048, now seen corresponding path program 5 times [2020-10-16 11:38:42,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:42,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167012786] [2020-10-16 11:38:42,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:42,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167012786] [2020-10-16 11:38:42,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609632661] [2020-10-16 11:38:42,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:42,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 11:38:42,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:42,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:38:42,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:42,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:42,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-10-16 11:38:42,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611880940] [2020-10-16 11:38:42,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:38:42,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:42,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:38:42,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=68, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:38:42,283 INFO L87 Difference]: Start difference. First operand 52 states and 98 transitions. Second operand 12 states. [2020-10-16 11:38:42,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:42,316 INFO L93 Difference]: Finished difference Result 53 states and 99 transitions. [2020-10-16 11:38:42,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:38:42,316 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:38:42,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:42,317 INFO L225 Difference]: With dead ends: 53 [2020-10-16 11:38:42,317 INFO L226 Difference]: Without dead ends: 53 [2020-10-16 11:38:42,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=68, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:38:42,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-16 11:38:42,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-16 11:38:42,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 11:38:42,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 99 transitions. [2020-10-16 11:38:42,322 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 99 transitions. Word has length 16 [2020-10-16 11:38:42,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:42,322 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 99 transitions. [2020-10-16 11:38:42,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:38:42,322 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 99 transitions. [2020-10-16 11:38:42,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:38:42,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:42,323 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:42,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:42,534 INFO L429 AbstractCegarLoop]: === Iteration 12 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:42,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:42,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1669794095, now seen corresponding path program 6 times [2020-10-16 11:38:42,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:42,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771664088] [2020-10-16 11:38:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:42,625 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:42,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771664088] [2020-10-16 11:38:42,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871019162] [2020-10-16 11:38:42,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:42,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 11:38:42,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:42,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:42,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:42,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:42,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-10-16 11:38:42,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405660132] [2020-10-16 11:38:42,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:38:42,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:42,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:38:42,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=80, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:38:42,767 INFO L87 Difference]: Start difference. First operand 53 states and 99 transitions. Second operand 13 states. [2020-10-16 11:38:42,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:42,803 INFO L93 Difference]: Finished difference Result 54 states and 100 transitions. [2020-10-16 11:38:42,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:38:42,804 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:38:42,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:42,804 INFO L225 Difference]: With dead ends: 54 [2020-10-16 11:38:42,804 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 11:38:42,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=76, Invalid=80, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:38:42,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 11:38:42,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-16 11:38:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 11:38:42,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 100 transitions. [2020-10-16 11:38:42,809 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 100 transitions. Word has length 17 [2020-10-16 11:38:42,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:42,809 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 100 transitions. [2020-10-16 11:38:42,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:38:42,810 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 100 transitions. [2020-10-16 11:38:42,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:38:42,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:42,810 INFO L422 BasicCegarLoop]: trace histogram [9, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:43,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-16 11:38:43,020 INFO L429 AbstractCegarLoop]: === Iteration 13 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:43,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:43,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1204679112, now seen corresponding path program 7 times [2020-10-16 11:38:43,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:43,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688192830] [2020-10-16 11:38:43,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:43,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688192830] [2020-10-16 11:38:43,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756625858] [2020-10-16 11:38:43,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:43,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:38:43,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:43,220 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:43,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:43,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-10-16 11:38:43,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289011549] [2020-10-16 11:38:43,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:38:43,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:43,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:38:43,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=93, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:38:43,222 INFO L87 Difference]: Start difference. First operand 54 states and 100 transitions. Second operand 14 states. [2020-10-16 11:38:43,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:43,261 INFO L93 Difference]: Finished difference Result 55 states and 101 transitions. [2020-10-16 11:38:43,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:38:43,262 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:38:43,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:43,263 INFO L225 Difference]: With dead ends: 55 [2020-10-16 11:38:43,263 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 11:38:43,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=89, Invalid=93, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:38:43,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 11:38:43,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-16 11:38:43,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 11:38:43,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 101 transitions. [2020-10-16 11:38:43,267 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 101 transitions. Word has length 18 [2020-10-16 11:38:43,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:43,267 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 101 transitions. [2020-10-16 11:38:43,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:38:43,268 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 101 transitions. [2020-10-16 11:38:43,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:38:43,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:43,268 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:43,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 11:38:43,480 INFO L429 AbstractCegarLoop]: === Iteration 14 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:43,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:43,480 INFO L82 PathProgramCache]: Analyzing trace with hash -119035313, now seen corresponding path program 8 times [2020-10-16 11:38:43,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:43,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448913942] [2020-10-16 11:38:43,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:43,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448913942] [2020-10-16 11:38:43,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193796915] [2020-10-16 11:38:43,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:43,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:38:43,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:43,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:38:43,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:43,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:43,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-10-16 11:38:43,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382262558] [2020-10-16 11:38:43,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:43,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:43,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:43,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=107, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:43,716 INFO L87 Difference]: Start difference. First operand 55 states and 101 transitions. Second operand 15 states. [2020-10-16 11:38:43,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:43,751 INFO L93 Difference]: Finished difference Result 56 states and 102 transitions. [2020-10-16 11:38:43,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:38:43,752 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:38:43,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:43,753 INFO L225 Difference]: With dead ends: 56 [2020-10-16 11:38:43,753 INFO L226 Difference]: Without dead ends: 56 [2020-10-16 11:38:43,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=107, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:43,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-16 11:38:43,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-16 11:38:43,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:38:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 102 transitions. [2020-10-16 11:38:43,759 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 102 transitions. Word has length 19 [2020-10-16 11:38:43,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:43,759 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 102 transitions. [2020-10-16 11:38:43,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:43,759 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 102 transitions. [2020-10-16 11:38:43,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:38:43,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:43,762 INFO L422 BasicCegarLoop]: trace histogram [11, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:43,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-16 11:38:43,963 INFO L429 AbstractCegarLoop]: === Iteration 15 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:43,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:43,964 INFO L82 PathProgramCache]: Analyzing trace with hash -823815912, now seen corresponding path program 9 times [2020-10-16 11:38:43,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:43,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203605663] [2020-10-16 11:38:43,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:44,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203605663] [2020-10-16 11:38:44,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103886464] [2020-10-16 11:38:44,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:44,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:38:44,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:44,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:38:44,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:44,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:44,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-16 11:38:44,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809645208] [2020-10-16 11:38:44,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:38:44,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:44,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:38:44,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=122, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:38:44,301 INFO L87 Difference]: Start difference. First operand 56 states and 102 transitions. Second operand 16 states. [2020-10-16 11:38:44,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:44,338 INFO L93 Difference]: Finished difference Result 57 states and 103 transitions. [2020-10-16 11:38:44,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:38:44,339 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:38:44,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:44,339 INFO L225 Difference]: With dead ends: 57 [2020-10-16 11:38:44,339 INFO L226 Difference]: Without dead ends: 57 [2020-10-16 11:38:44,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=118, Invalid=122, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:38:44,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-16 11:38:44,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-16 11:38:44,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:38:44,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 103 transitions. [2020-10-16 11:38:44,343 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 103 transitions. Word has length 20 [2020-10-16 11:38:44,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:44,343 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 103 transitions. [2020-10-16 11:38:44,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:38:44,343 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 103 transitions. [2020-10-16 11:38:44,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:38:44,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:44,344 INFO L422 BasicCegarLoop]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:44,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:44,545 INFO L429 AbstractCegarLoop]: === Iteration 16 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:44,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:44,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1197178001, now seen corresponding path program 10 times [2020-10-16 11:38:44,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:44,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171120669] [2020-10-16 11:38:44,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:44,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171120669] [2020-10-16 11:38:44,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656317964] [2020-10-16 11:38:44,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:44,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:38:44,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:44,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:38:44,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:44,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:44,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-10-16 11:38:44,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467084548] [2020-10-16 11:38:44,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:38:44,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:44,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:38:44,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=138, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:38:44,782 INFO L87 Difference]: Start difference. First operand 57 states and 103 transitions. Second operand 17 states. [2020-10-16 11:38:44,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:44,835 INFO L93 Difference]: Finished difference Result 58 states and 104 transitions. [2020-10-16 11:38:44,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:38:44,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:38:44,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:44,837 INFO L225 Difference]: With dead ends: 58 [2020-10-16 11:38:44,837 INFO L226 Difference]: Without dead ends: 58 [2020-10-16 11:38:44,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=138, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:38:44,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-16 11:38:44,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-16 11:38:44,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:38:44,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 104 transitions. [2020-10-16 11:38:44,843 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 104 transitions. Word has length 21 [2020-10-16 11:38:44,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:44,843 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 104 transitions. [2020-10-16 11:38:44,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:38:44,843 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 104 transitions. [2020-10-16 11:38:44,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:38:44,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:44,844 INFO L422 BasicCegarLoop]: trace histogram [13, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:45,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 11:38:45,055 INFO L429 AbstractCegarLoop]: === Iteration 17 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:45,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:45,055 INFO L82 PathProgramCache]: Analyzing trace with hash 113499128, now seen corresponding path program 11 times [2020-10-16 11:38:45,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:45,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151859431] [2020-10-16 11:38:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:45,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151859431] [2020-10-16 11:38:45,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050044749] [2020-10-16 11:38:45,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:45,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:38:45,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:45,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:38:45,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:45,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:45,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-10-16 11:38:45,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307231498] [2020-10-16 11:38:45,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:38:45,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:45,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:38:45,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=155, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:38:45,452 INFO L87 Difference]: Start difference. First operand 58 states and 104 transitions. Second operand 18 states. [2020-10-16 11:38:45,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:45,502 INFO L93 Difference]: Finished difference Result 59 states and 105 transitions. [2020-10-16 11:38:45,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:38:45,503 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:38:45,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:45,504 INFO L225 Difference]: With dead ends: 59 [2020-10-16 11:38:45,505 INFO L226 Difference]: Without dead ends: 59 [2020-10-16 11:38:45,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=155, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:38:45,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-16 11:38:45,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-16 11:38:45,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-16 11:38:45,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 105 transitions. [2020-10-16 11:38:45,513 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 105 transitions. Word has length 22 [2020-10-16 11:38:45,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:45,516 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 105 transitions. [2020-10-16 11:38:45,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:38:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 105 transitions. [2020-10-16 11:38:45,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:38:45,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:45,519 INFO L422 BasicCegarLoop]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:45,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 11:38:45,735 INFO L429 AbstractCegarLoop]: === Iteration 18 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:45,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:45,736 INFO L82 PathProgramCache]: Analyzing trace with hash 2089784463, now seen corresponding path program 12 times [2020-10-16 11:38:45,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:45,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275885579] [2020-10-16 11:38:45,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:45,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275885579] [2020-10-16 11:38:45,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126643995] [2020-10-16 11:38:45,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:46,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:38:46,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:46,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:38:46,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:46,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:46,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-10-16 11:38:46,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822916502] [2020-10-16 11:38:46,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:38:46,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:46,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:38:46,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=173, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:38:46,189 INFO L87 Difference]: Start difference. First operand 59 states and 105 transitions. Second operand 19 states. [2020-10-16 11:38:46,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:46,224 INFO L93 Difference]: Finished difference Result 60 states and 106 transitions. [2020-10-16 11:38:46,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:38:46,225 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:38:46,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:46,225 INFO L225 Difference]: With dead ends: 60 [2020-10-16 11:38:46,225 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 11:38:46,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=173, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:38:46,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 11:38:46,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-16 11:38:46,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 11:38:46,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 106 transitions. [2020-10-16 11:38:46,229 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 106 transitions. Word has length 23 [2020-10-16 11:38:46,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:46,229 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 106 transitions. [2020-10-16 11:38:46,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:38:46,229 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 106 transitions. [2020-10-16 11:38:46,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:38:46,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:46,232 INFO L422 BasicCegarLoop]: trace histogram [15, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:46,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 11:38:46,443 INFO L429 AbstractCegarLoop]: === Iteration 19 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:46,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:46,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1069879592, now seen corresponding path program 13 times [2020-10-16 11:38:46,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:46,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042931467] [2020-10-16 11:38:46,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:46,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042931467] [2020-10-16 11:38:46,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037555861] [2020-10-16 11:38:46,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:46,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:38:46,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:46,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:46,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-16 11:38:46,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42438401] [2020-10-16 11:38:46,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:38:46,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:46,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:38:46,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=192, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:38:46,736 INFO L87 Difference]: Start difference. First operand 60 states and 106 transitions. Second operand 20 states. [2020-10-16 11:38:46,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:46,780 INFO L93 Difference]: Finished difference Result 61 states and 107 transitions. [2020-10-16 11:38:46,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:38:46,781 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:38:46,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:46,782 INFO L225 Difference]: With dead ends: 61 [2020-10-16 11:38:46,782 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:38:46,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=188, Invalid=192, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:38:46,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:38:46,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-16 11:38:46,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 11:38:46,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 107 transitions. [2020-10-16 11:38:46,785 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 107 transitions. Word has length 24 [2020-10-16 11:38:46,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:46,785 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 107 transitions. [2020-10-16 11:38:46,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:38:46,785 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 107 transitions. [2020-10-16 11:38:46,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:38:46,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:46,786 INFO L422 BasicCegarLoop]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:46,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:46,996 INFO L429 AbstractCegarLoop]: === Iteration 20 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:46,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:46,997 INFO L82 PathProgramCache]: Analyzing trace with hash -235217489, now seen corresponding path program 14 times [2020-10-16 11:38:46,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:46,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088857074] [2020-10-16 11:38:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:47,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088857074] [2020-10-16 11:38:47,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511562161] [2020-10-16 11:38:47,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:47,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:38:47,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:47,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:38:47,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:47,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:47,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-10-16 11:38:47,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121859301] [2020-10-16 11:38:47,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:38:47,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:47,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:38:47,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=212, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:38:47,333 INFO L87 Difference]: Start difference. First operand 61 states and 107 transitions. Second operand 21 states. [2020-10-16 11:38:47,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:47,382 INFO L93 Difference]: Finished difference Result 62 states and 108 transitions. [2020-10-16 11:38:47,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:38:47,383 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:38:47,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:47,384 INFO L225 Difference]: With dead ends: 62 [2020-10-16 11:38:47,384 INFO L226 Difference]: Without dead ends: 62 [2020-10-16 11:38:47,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=212, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:38:47,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-16 11:38:47,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-16 11:38:47,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:38:47,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 108 transitions. [2020-10-16 11:38:47,387 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 108 transitions. Word has length 25 [2020-10-16 11:38:47,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:47,388 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 108 transitions. [2020-10-16 11:38:47,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:38:47,388 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 108 transitions. [2020-10-16 11:38:47,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:38:47,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:47,388 INFO L422 BasicCegarLoop]: trace histogram [17, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:47,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:47,599 INFO L429 AbstractCegarLoop]: === Iteration 21 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:47,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:47,600 INFO L82 PathProgramCache]: Analyzing trace with hash -130496072, now seen corresponding path program 15 times [2020-10-16 11:38:47,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:47,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609034112] [2020-10-16 11:38:47,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:47,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609034112] [2020-10-16 11:38:47,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263032927] [2020-10-16 11:38:47,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:48,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:38:48,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:48,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:38:48,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:48,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:48,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 11:38:48,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272272824] [2020-10-16 11:38:48,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:38:48,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:48,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:38:48,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=233, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:38:48,328 INFO L87 Difference]: Start difference. First operand 62 states and 108 transitions. Second operand 22 states. [2020-10-16 11:38:48,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:48,365 INFO L93 Difference]: Finished difference Result 63 states and 109 transitions. [2020-10-16 11:38:48,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:38:48,365 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:38:48,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:48,366 INFO L225 Difference]: With dead ends: 63 [2020-10-16 11:38:48,366 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 11:38:48,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=233, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:38:48,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 11:38:48,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-16 11:38:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:38:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 109 transitions. [2020-10-16 11:38:48,373 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 109 transitions. Word has length 26 [2020-10-16 11:38:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:48,378 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 109 transitions. [2020-10-16 11:38:48,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:38:48,378 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 109 transitions. [2020-10-16 11:38:48,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:38:48,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:48,380 INFO L422 BasicCegarLoop]: trace histogram [18, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:48,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-16 11:38:48,592 INFO L429 AbstractCegarLoop]: === Iteration 22 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:48,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:48,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1179099441, now seen corresponding path program 16 times [2020-10-16 11:38:48,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:48,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925619366] [2020-10-16 11:38:48,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:48,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925619366] [2020-10-16 11:38:48,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712798267] [2020-10-16 11:38:48,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:48,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:38:48,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:48,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:38:48,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:48,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:48,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-10-16 11:38:48,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061578897] [2020-10-16 11:38:48,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:38:48,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:48,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:38:48,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=255, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:38:48,950 INFO L87 Difference]: Start difference. First operand 63 states and 109 transitions. Second operand 23 states. [2020-10-16 11:38:48,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:48,992 INFO L93 Difference]: Finished difference Result 64 states and 110 transitions. [2020-10-16 11:38:48,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:38:48,992 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:38:48,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:48,993 INFO L225 Difference]: With dead ends: 64 [2020-10-16 11:38:48,993 INFO L226 Difference]: Without dead ends: 64 [2020-10-16 11:38:48,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=251, Invalid=255, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:38:48,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-16 11:38:48,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-16 11:38:48,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:38:48,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 110 transitions. [2020-10-16 11:38:48,998 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 110 transitions. Word has length 27 [2020-10-16 11:38:48,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:48,998 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 110 transitions. [2020-10-16 11:38:48,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:38:48,999 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 110 transitions. [2020-10-16 11:38:48,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:38:48,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:48,999 INFO L422 BasicCegarLoop]: trace histogram [19, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:49,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 11:38:49,200 INFO L429 AbstractCegarLoop]: === Iteration 23 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:49,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:49,201 INFO L82 PathProgramCache]: Analyzing trace with hash 673934488, now seen corresponding path program 17 times [2020-10-16 11:38:49,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:49,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147630016] [2020-10-16 11:38:49,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:49,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147630016] [2020-10-16 11:38:49,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580621871] [2020-10-16 11:38:49,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:49,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 11:38:49,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:49,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:38:49,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:49,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:49,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-10-16 11:38:49,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890015799] [2020-10-16 11:38:49,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:38:49,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:49,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:38:49,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=278, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:38:49,768 INFO L87 Difference]: Start difference. First operand 64 states and 110 transitions. Second operand 24 states. [2020-10-16 11:38:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:49,807 INFO L93 Difference]: Finished difference Result 65 states and 111 transitions. [2020-10-16 11:38:49,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:38:49,808 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:38:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:49,809 INFO L225 Difference]: With dead ends: 65 [2020-10-16 11:38:49,809 INFO L226 Difference]: Without dead ends: 65 [2020-10-16 11:38:49,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=274, Invalid=278, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:38:49,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-16 11:38:49,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-16 11:38:49,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 11:38:49,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 111 transitions. [2020-10-16 11:38:49,812 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 111 transitions. Word has length 28 [2020-10-16 11:38:49,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:49,813 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 111 transitions. [2020-10-16 11:38:49,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:38:49,813 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 111 transitions. [2020-10-16 11:38:49,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 11:38:49,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:49,814 INFO L422 BasicCegarLoop]: trace histogram [20, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:50,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:50,015 INFO L429 AbstractCegarLoop]: === Iteration 24 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:50,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:50,015 INFO L82 PathProgramCache]: Analyzing trace with hash -2011555857, now seen corresponding path program 18 times [2020-10-16 11:38:50,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:50,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759140586] [2020-10-16 11:38:50,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:50,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759140586] [2020-10-16 11:38:50,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424580355] [2020-10-16 11:38:50,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:51,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-16 11:38:51,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:51,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:38:51,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:51,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:51,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-10-16 11:38:51,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143743318] [2020-10-16 11:38:51,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:38:51,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:51,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:38:51,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=302, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:38:51,721 INFO L87 Difference]: Start difference. First operand 65 states and 111 transitions. Second operand 25 states. [2020-10-16 11:38:51,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:51,768 INFO L93 Difference]: Finished difference Result 66 states and 112 transitions. [2020-10-16 11:38:51,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:38:51,768 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-16 11:38:51,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:51,769 INFO L225 Difference]: With dead ends: 66 [2020-10-16 11:38:51,769 INFO L226 Difference]: Without dead ends: 66 [2020-10-16 11:38:51,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=302, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:38:51,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-16 11:38:51,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-16 11:38:51,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:38:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 112 transitions. [2020-10-16 11:38:51,772 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 112 transitions. Word has length 29 [2020-10-16 11:38:51,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:51,772 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 112 transitions. [2020-10-16 11:38:51,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:38:51,772 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 112 transitions. [2020-10-16 11:38:51,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-16 11:38:51,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:51,773 INFO L422 BasicCegarLoop]: trace histogram [21, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:51,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 11:38:51,982 INFO L429 AbstractCegarLoop]: === Iteration 25 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:51,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:51,982 INFO L82 PathProgramCache]: Analyzing trace with hash 637589368, now seen corresponding path program 19 times [2020-10-16 11:38:51,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:51,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073163046] [2020-10-16 11:38:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:52,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073163046] [2020-10-16 11:38:52,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268163339] [2020-10-16 11:38:52,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:52,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:38:52,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:52,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:52,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-10-16 11:38:52,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601613245] [2020-10-16 11:38:52,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-16 11:38:52,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:52,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-16 11:38:52,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=327, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:38:52,406 INFO L87 Difference]: Start difference. First operand 66 states and 112 transitions. Second operand 26 states. [2020-10-16 11:38:52,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:52,458 INFO L93 Difference]: Finished difference Result 67 states and 113 transitions. [2020-10-16 11:38:52,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:38:52,459 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-16 11:38:52,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:52,460 INFO L225 Difference]: With dead ends: 67 [2020-10-16 11:38:52,460 INFO L226 Difference]: Without dead ends: 67 [2020-10-16 11:38:52,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=323, Invalid=327, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:38:52,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-16 11:38:52,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-16 11:38:52,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 11:38:52,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 113 transitions. [2020-10-16 11:38:52,463 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 113 transitions. Word has length 30 [2020-10-16 11:38:52,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:52,463 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 113 transitions. [2020-10-16 11:38:52,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-16 11:38:52,463 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 113 transitions. [2020-10-16 11:38:52,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-16 11:38:52,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:52,464 INFO L422 BasicCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:52,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:52,671 INFO L429 AbstractCegarLoop]: === Iteration 26 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:52,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:52,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1156712719, now seen corresponding path program 20 times [2020-10-16 11:38:52,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:52,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542484071] [2020-10-16 11:38:52,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:53,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542484071] [2020-10-16 11:38:53,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597051233] [2020-10-16 11:38:53,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:53,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:38:53,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:53,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:38:53,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:53,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:53,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-10-16 11:38:53,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288830971] [2020-10-16 11:38:53,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 11:38:53,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:53,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 11:38:53,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=353, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:38:53,226 INFO L87 Difference]: Start difference. First operand 67 states and 113 transitions. Second operand 27 states. [2020-10-16 11:38:53,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:53,289 INFO L93 Difference]: Finished difference Result 68 states and 114 transitions. [2020-10-16 11:38:53,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:38:53,289 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-16 11:38:53,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:53,290 INFO L225 Difference]: With dead ends: 68 [2020-10-16 11:38:53,290 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 11:38:53,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=349, Invalid=353, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:38:53,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 11:38:53,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-16 11:38:53,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:38:53,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 114 transitions. [2020-10-16 11:38:53,294 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 114 transitions. Word has length 31 [2020-10-16 11:38:53,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:53,294 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 114 transitions. [2020-10-16 11:38:53,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 11:38:53,294 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 114 transitions. [2020-10-16 11:38:53,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-16 11:38:53,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:53,295 INFO L422 BasicCegarLoop]: trace histogram [23, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:53,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 11:38:53,505 INFO L429 AbstractCegarLoop]: === Iteration 27 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:53,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:53,505 INFO L82 PathProgramCache]: Analyzing trace with hash 69667416, now seen corresponding path program 21 times [2020-10-16 11:38:53,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:53,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064054068] [2020-10-16 11:38:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:54,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064054068] [2020-10-16 11:38:54,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11776448] [2020-10-16 11:38:54,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:57,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-16 11:38:57,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:57,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-16 11:38:57,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:57,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:57,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2020-10-16 11:38:57,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92155210] [2020-10-16 11:38:57,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 11:38:57,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:57,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 11:38:57,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=380, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:38:57,763 INFO L87 Difference]: Start difference. First operand 68 states and 114 transitions. Second operand 28 states. [2020-10-16 11:38:57,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:57,800 INFO L93 Difference]: Finished difference Result 69 states and 115 transitions. [2020-10-16 11:38:57,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:38:57,801 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-16 11:38:57,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:57,802 INFO L225 Difference]: With dead ends: 69 [2020-10-16 11:38:57,802 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 11:38:57,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=376, Invalid=380, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:38:57,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 11:38:57,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-16 11:38:57,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:38:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 115 transitions. [2020-10-16 11:38:57,805 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 115 transitions. Word has length 32 [2020-10-16 11:38:57,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:57,805 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 115 transitions. [2020-10-16 11:38:57,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-16 11:38:57,805 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 115 transitions. [2020-10-16 11:38:57,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-16 11:38:57,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:57,806 INFO L422 BasicCegarLoop]: trace histogram [24, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:58,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-16 11:38:58,016 INFO L429 AbstractCegarLoop]: === Iteration 28 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:58,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:58,017 INFO L82 PathProgramCache]: Analyzing trace with hash 731001391, now seen corresponding path program 22 times [2020-10-16 11:38:58,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:58,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121474125] [2020-10-16 11:38:58,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:58,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121474125] [2020-10-16 11:38:58,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587142561] [2020-10-16 11:38:58,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:58,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:38:58,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:58,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-16 11:38:58,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:58,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:58,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-10-16 11:38:58,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988394208] [2020-10-16 11:38:58,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-16 11:38:58,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:58,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-16 11:38:58,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=408, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:38:58,587 INFO L87 Difference]: Start difference. First operand 69 states and 115 transitions. Second operand 29 states. [2020-10-16 11:38:58,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:58,653 INFO L93 Difference]: Finished difference Result 70 states and 116 transitions. [2020-10-16 11:38:58,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:38:58,654 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-16 11:38:58,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:58,655 INFO L225 Difference]: With dead ends: 70 [2020-10-16 11:38:58,655 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 11:38:58,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=404, Invalid=408, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:38:58,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 11:38:58,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-16 11:38:58,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:38:58,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 116 transitions. [2020-10-16 11:38:58,661 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 116 transitions. Word has length 33 [2020-10-16 11:38:58,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:58,661 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 116 transitions. [2020-10-16 11:38:58,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-16 11:38:58,662 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 116 transitions. [2020-10-16 11:38:58,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-16 11:38:58,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:58,664 INFO L422 BasicCegarLoop]: trace histogram [25, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:38:58,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 11:38:58,864 INFO L429 AbstractCegarLoop]: === Iteration 29 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:38:58,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:58,865 INFO L82 PathProgramCache]: Analyzing trace with hash -242481864, now seen corresponding path program 23 times [2020-10-16 11:38:58,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:58,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281617730] [2020-10-16 11:38:58,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:59,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281617730] [2020-10-16 11:38:59,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644559797] [2020-10-16 11:38:59,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:59,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-16 11:38:59,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:59,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-16 11:38:59,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:38:59,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:59,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2020-10-16 11:38:59,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880825034] [2020-10-16 11:38:59,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-16 11:38:59,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:59,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-16 11:38:59,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=437, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:38:59,837 INFO L87 Difference]: Start difference. First operand 70 states and 116 transitions. Second operand 30 states. [2020-10-16 11:38:59,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:59,881 INFO L93 Difference]: Finished difference Result 71 states and 117 transitions. [2020-10-16 11:38:59,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:38:59,881 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-16 11:38:59,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:59,882 INFO L225 Difference]: With dead ends: 71 [2020-10-16 11:38:59,882 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:38:59,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=433, Invalid=437, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:38:59,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:38:59,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-16 11:38:59,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 11:38:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 117 transitions. [2020-10-16 11:38:59,887 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 117 transitions. Word has length 34 [2020-10-16 11:38:59,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:59,888 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 117 transitions. [2020-10-16 11:38:59,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-16 11:38:59,888 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 117 transitions. [2020-10-16 11:38:59,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:38:59,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:59,888 INFO L422 BasicCegarLoop]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:39:00,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 11:39:00,089 INFO L429 AbstractCegarLoop]: === Iteration 30 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:39:00,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:00,090 INFO L82 PathProgramCache]: Analyzing trace with hash -355691697, now seen corresponding path program 24 times [2020-10-16 11:39:00,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:00,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43184447] [2020-10-16 11:39:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:39:00,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43184447] [2020-10-16 11:39:00,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587859015] [2020-10-16 11:39:00,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:39:03,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-10-16 11:39:03,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:04,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-16 11:39:04,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:39:04,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:04,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-10-16 11:39:04,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371516873] [2020-10-16 11:39:04,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-16 11:39:04,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:04,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-16 11:39:04,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=467, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:39:04,036 INFO L87 Difference]: Start difference. First operand 71 states and 117 transitions. Second operand 31 states. [2020-10-16 11:39:04,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:04,095 INFO L93 Difference]: Finished difference Result 72 states and 118 transitions. [2020-10-16 11:39:04,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:39:04,095 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-16 11:39:04,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:04,096 INFO L225 Difference]: With dead ends: 72 [2020-10-16 11:39:04,096 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 11:39:04,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=463, Invalid=467, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:39:04,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 11:39:04,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-16 11:39:04,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 11:39:04,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 118 transitions. [2020-10-16 11:39:04,102 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 118 transitions. Word has length 35 [2020-10-16 11:39:04,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:04,102 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 118 transitions. [2020-10-16 11:39:04,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-16 11:39:04,102 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 118 transitions. [2020-10-16 11:39:04,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-16 11:39:04,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:04,103 INFO L422 BasicCegarLoop]: trace histogram [27, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:39:04,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:04,304 INFO L429 AbstractCegarLoop]: === Iteration 31 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:39:04,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:04,304 INFO L82 PathProgramCache]: Analyzing trace with hash 429770776, now seen corresponding path program 25 times [2020-10-16 11:39:04,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:04,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736894447] [2020-10-16 11:39:04,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:39:04,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736894447] [2020-10-16 11:39:04,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638934858] [2020-10-16 11:39:04,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:39:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:04,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-16 11:39:04,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:39:04,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:04,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-10-16 11:39:04,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103717315] [2020-10-16 11:39:04,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-16 11:39:04,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:04,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-16 11:39:04,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=498, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:39:04,938 INFO L87 Difference]: Start difference. First operand 72 states and 118 transitions. Second operand 32 states. [2020-10-16 11:39:05,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:05,002 INFO L93 Difference]: Finished difference Result 73 states and 119 transitions. [2020-10-16 11:39:05,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:39:05,003 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-10-16 11:39:05,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:05,004 INFO L225 Difference]: With dead ends: 73 [2020-10-16 11:39:05,004 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 11:39:05,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=494, Invalid=498, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:39:05,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 11:39:05,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-16 11:39:05,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 11:39:05,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2020-10-16 11:39:05,009 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 36 [2020-10-16 11:39:05,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:05,009 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2020-10-16 11:39:05,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-16 11:39:05,009 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2020-10-16 11:39:05,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-16 11:39:05,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:05,010 INFO L422 BasicCegarLoop]: trace histogram [28, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:39:05,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:05,220 INFO L429 AbstractCegarLoop]: === Iteration 32 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:39:05,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:05,221 INFO L82 PathProgramCache]: Analyzing trace with hash -990696337, now seen corresponding path program 26 times [2020-10-16 11:39:05,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:05,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526585493] [2020-10-16 11:39:05,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:39:05,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526585493] [2020-10-16 11:39:05,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569085163] [2020-10-16 11:39:05,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:39:05,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:39:05,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:05,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-16 11:39:05,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:39:05,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:05,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 32 [2020-10-16 11:39:05,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663536075] [2020-10-16 11:39:05,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-16 11:39:05,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:05,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-16 11:39:05,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=530, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:39:05,866 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 33 states. [2020-10-16 11:39:05,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:05,927 INFO L93 Difference]: Finished difference Result 74 states and 120 transitions. [2020-10-16 11:39:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:39:05,928 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2020-10-16 11:39:05,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:05,929 INFO L225 Difference]: With dead ends: 74 [2020-10-16 11:39:05,929 INFO L226 Difference]: Without dead ends: 74 [2020-10-16 11:39:05,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=526, Invalid=530, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:39:05,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-16 11:39:05,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-16 11:39:05,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:39:05,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 120 transitions. [2020-10-16 11:39:05,937 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 120 transitions. Word has length 37 [2020-10-16 11:39:05,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:05,937 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 120 transitions. [2020-10-16 11:39:05,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-16 11:39:05,938 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 120 transitions. [2020-10-16 11:39:05,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-16 11:39:05,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:05,959 INFO L422 BasicCegarLoop]: trace histogram [29, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:39:06,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:06,168 INFO L429 AbstractCegarLoop]: === Iteration 33 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:39:06,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:06,169 INFO L82 PathProgramCache]: Analyzing trace with hash -2075503880, now seen corresponding path program 27 times [2020-10-16 11:39:06,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:06,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412137852] [2020-10-16 11:39:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:39:06,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412137852] [2020-10-16 11:39:06,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258525634] [2020-10-16 11:39:06,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:39:07,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-16 11:39:07,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:07,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-16 11:39:07,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:39:07,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:07,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2020-10-16 11:39:07,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956535546] [2020-10-16 11:39:07,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-16 11:39:07,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:07,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-16 11:39:07,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=563, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:39:07,711 INFO L87 Difference]: Start difference. First operand 74 states and 120 transitions. Second operand 34 states. [2020-10-16 11:39:07,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:07,766 INFO L93 Difference]: Finished difference Result 75 states and 121 transitions. [2020-10-16 11:39:07,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:39:07,767 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2020-10-16 11:39:07,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:07,768 INFO L225 Difference]: With dead ends: 75 [2020-10-16 11:39:07,768 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 11:39:07,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=559, Invalid=563, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:39:07,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 11:39:07,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-16 11:39:07,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:39:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 121 transitions. [2020-10-16 11:39:07,774 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 121 transitions. Word has length 38 [2020-10-16 11:39:07,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:07,774 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 121 transitions. [2020-10-16 11:39:07,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-16 11:39:07,775 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 121 transitions. [2020-10-16 11:39:07,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-16 11:39:07,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:07,775 INFO L422 BasicCegarLoop]: trace histogram [30, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:39:07,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-16 11:39:07,976 INFO L429 AbstractCegarLoop]: === Iteration 34 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:39:07,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:07,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1344799345, now seen corresponding path program 28 times [2020-10-16 11:39:07,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:07,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99993296] [2020-10-16 11:39:07,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:39:08,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99993296] [2020-10-16 11:39:08,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881350687] [2020-10-16 11:39:08,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:39:08,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:39:08,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:08,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-16 11:39:08,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:39:08,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:08,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2020-10-16 11:39:08,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431022102] [2020-10-16 11:39:08,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-16 11:39:08,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:08,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-16 11:39:08,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=597, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 11:39:08,676 INFO L87 Difference]: Start difference. First operand 75 states and 121 transitions. Second operand 35 states. [2020-10-16 11:39:08,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:08,737 INFO L93 Difference]: Finished difference Result 76 states and 122 transitions. [2020-10-16 11:39:08,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:39:08,738 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 39 [2020-10-16 11:39:08,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:08,739 INFO L225 Difference]: With dead ends: 76 [2020-10-16 11:39:08,739 INFO L226 Difference]: Without dead ends: 76 [2020-10-16 11:39:08,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=593, Invalid=597, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 11:39:08,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-16 11:39:08,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-16 11:39:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:39:08,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 122 transitions. [2020-10-16 11:39:08,743 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 122 transitions. Word has length 39 [2020-10-16 11:39:08,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:08,743 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 122 transitions. [2020-10-16 11:39:08,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-16 11:39:08,743 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 122 transitions. [2020-10-16 11:39:08,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-16 11:39:08,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:08,744 INFO L422 BasicCegarLoop]: trace histogram [31, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:39:08,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:08,955 INFO L429 AbstractCegarLoop]: === Iteration 35 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:39:08,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:08,956 INFO L82 PathProgramCache]: Analyzing trace with hash -167795240, now seen corresponding path program 29 times [2020-10-16 11:39:08,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:08,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988261337] [2020-10-16 11:39:08,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:39:09,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988261337] [2020-10-16 11:39:09,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122273685] [2020-10-16 11:39:09,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:39:10,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-10-16 11:39:10,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:10,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-16 11:39:10,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:39:10,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:10,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2020-10-16 11:39:10,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985118974] [2020-10-16 11:39:10,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-16 11:39:10,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:10,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-16 11:39:10,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=632, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:39:10,806 INFO L87 Difference]: Start difference. First operand 76 states and 122 transitions. Second operand 36 states. [2020-10-16 11:39:10,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:10,861 INFO L93 Difference]: Finished difference Result 77 states and 123 transitions. [2020-10-16 11:39:10,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:39:10,862 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2020-10-16 11:39:10,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:10,863 INFO L225 Difference]: With dead ends: 77 [2020-10-16 11:39:10,863 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 11:39:10,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=628, Invalid=632, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:39:10,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 11:39:10,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-16 11:39:10,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 11:39:10,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 123 transitions. [2020-10-16 11:39:10,866 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 123 transitions. Word has length 40 [2020-10-16 11:39:10,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:10,866 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 123 transitions. [2020-10-16 11:39:10,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-16 11:39:10,867 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 123 transitions. [2020-10-16 11:39:10,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-16 11:39:10,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:10,867 INFO L422 BasicCegarLoop]: trace histogram [32, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:39:11,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-16 11:39:11,077 INFO L429 AbstractCegarLoop]: === Iteration 36 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:39:11,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:11,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1959593647, now seen corresponding path program 30 times [2020-10-16 11:39:11,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:11,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792909163] [2020-10-16 11:39:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:39:11,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792909163] [2020-10-16 11:39:11,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522840005] [2020-10-16 11:39:11,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:39:33,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-10-16 11:39:33,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:33,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-16 11:39:33,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:39:33,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:33,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2020-10-16 11:39:33,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049076987] [2020-10-16 11:39:33,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-16 11:39:33,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:33,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-16 11:39:33,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=668, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:39:33,900 INFO L87 Difference]: Start difference. First operand 77 states and 123 transitions. Second operand 37 states. [2020-10-16 11:39:33,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:33,959 INFO L93 Difference]: Finished difference Result 78 states and 124 transitions. [2020-10-16 11:39:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:39:33,959 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 41 [2020-10-16 11:39:33,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:33,960 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:39:33,960 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 11:39:33,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=664, Invalid=668, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:39:33,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 11:39:33,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-16 11:39:33,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 11:39:33,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 124 transitions. [2020-10-16 11:39:33,963 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 124 transitions. Word has length 41 [2020-10-16 11:39:33,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:33,964 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 124 transitions. [2020-10-16 11:39:33,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-16 11:39:33,964 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 124 transitions. [2020-10-16 11:39:33,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-16 11:39:33,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:33,965 INFO L422 BasicCegarLoop]: trace histogram [33, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:39:34,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:34,174 INFO L429 AbstractCegarLoop]: === Iteration 37 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:39:34,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:34,174 INFO L82 PathProgramCache]: Analyzing trace with hash -810827592, now seen corresponding path program 31 times [2020-10-16 11:39:34,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:34,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295164851] [2020-10-16 11:39:34,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:39:34,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295164851] [2020-10-16 11:39:34,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292404341] [2020-10-16 11:39:34,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:39:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:35,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-16 11:39:35,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:39:35,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:35,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2020-10-16 11:39:35,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477317570] [2020-10-16 11:39:35,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-16 11:39:35,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:35,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-16 11:39:35,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=705, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 11:39:35,035 INFO L87 Difference]: Start difference. First operand 78 states and 124 transitions. Second operand 38 states. [2020-10-16 11:39:35,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:35,101 INFO L93 Difference]: Finished difference Result 79 states and 125 transitions. [2020-10-16 11:39:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:39:35,101 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2020-10-16 11:39:35,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:35,102 INFO L225 Difference]: With dead ends: 79 [2020-10-16 11:39:35,102 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 11:39:35,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=701, Invalid=705, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 11:39:35,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 11:39:35,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-16 11:39:35,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 11:39:35,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 125 transitions. [2020-10-16 11:39:35,106 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 125 transitions. Word has length 42 [2020-10-16 11:39:35,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:35,106 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 125 transitions. [2020-10-16 11:39:35,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-16 11:39:35,107 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 125 transitions. [2020-10-16 11:39:35,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-16 11:39:35,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:35,107 INFO L422 BasicCegarLoop]: trace histogram [34, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:39:35,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 11:39:35,308 INFO L429 AbstractCegarLoop]: === Iteration 38 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:39:35,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:35,309 INFO L82 PathProgramCache]: Analyzing trace with hash -794540081, now seen corresponding path program 32 times [2020-10-16 11:39:35,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:35,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847164061] [2020-10-16 11:39:35,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:39:36,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847164061] [2020-10-16 11:39:36,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276159237] [2020-10-16 11:39:36,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:39:36,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:39:36,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:36,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-16 11:39:36,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:39:36,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:36,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 38 [2020-10-16 11:39:36,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364531117] [2020-10-16 11:39:36,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-16 11:39:36,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:36,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-16 11:39:36,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=739, Invalid=743, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:39:36,175 INFO L87 Difference]: Start difference. First operand 79 states and 125 transitions. Second operand 39 states. [2020-10-16 11:39:36,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:36,233 INFO L93 Difference]: Finished difference Result 80 states and 126 transitions. [2020-10-16 11:39:36,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 11:39:36,234 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 43 [2020-10-16 11:39:36,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:36,235 INFO L225 Difference]: With dead ends: 80 [2020-10-16 11:39:36,235 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 11:39:36,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=739, Invalid=743, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:39:36,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 11:39:36,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-16 11:39:36,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:39:36,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 126 transitions. [2020-10-16 11:39:36,239 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 126 transitions. Word has length 43 [2020-10-16 11:39:36,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:36,239 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 126 transitions. [2020-10-16 11:39:36,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-16 11:39:36,239 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 126 transitions. [2020-10-16 11:39:36,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-16 11:39:36,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:36,242 INFO L422 BasicCegarLoop]: trace histogram [35, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:39:36,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-16 11:39:36,452 INFO L429 AbstractCegarLoop]: === Iteration 39 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:39:36,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:36,453 INFO L82 PathProgramCache]: Analyzing trace with hash -289627240, now seen corresponding path program 33 times [2020-10-16 11:39:36,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:36,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320190439] [2020-10-16 11:39:36,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:39:37,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320190439] [2020-10-16 11:39:37,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208679848] [2020-10-16 11:39:37,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:40:52,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-10-16 11:40:52,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:54,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-16 11:40:54,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:40:54,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:54,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2020-10-16 11:40:54,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268746862] [2020-10-16 11:40:54,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-16 11:40:54,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:54,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-16 11:40:54,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=778, Invalid=782, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:40:54,559 INFO L87 Difference]: Start difference. First operand 80 states and 126 transitions. Second operand 40 states. [2020-10-16 11:40:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:54,609 INFO L93 Difference]: Finished difference Result 81 states and 127 transitions. [2020-10-16 11:40:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 11:40:54,609 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2020-10-16 11:40:54,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:54,610 INFO L225 Difference]: With dead ends: 81 [2020-10-16 11:40:54,610 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 11:40:54,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=778, Invalid=782, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:40:54,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 11:40:54,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-16 11:40:54,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:40:54,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 127 transitions. [2020-10-16 11:40:54,614 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 127 transitions. Word has length 44 [2020-10-16 11:40:54,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:54,614 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 127 transitions. [2020-10-16 11:40:54,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-16 11:40:54,614 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 127 transitions. [2020-10-16 11:40:54,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-16 11:40:54,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:54,615 INFO L422 BasicCegarLoop]: trace histogram [36, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:40:54,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 11:40:54,824 INFO L429 AbstractCegarLoop]: === Iteration 40 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:40:54,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:54,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1817198353, now seen corresponding path program 34 times [2020-10-16 11:40:54,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:54,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544502049] [2020-10-16 11:40:54,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:40:55,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544502049] [2020-10-16 11:40:55,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535282629] [2020-10-16 11:40:55,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:40:55,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:55,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:55,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-16 11:40:55,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:40:55,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:55,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2020-10-16 11:40:55,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576885756] [2020-10-16 11:40:55,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-16 11:40:55,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:55,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-16 11:40:55,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=822, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 11:40:55,697 INFO L87 Difference]: Start difference. First operand 81 states and 127 transitions. Second operand 41 states. [2020-10-16 11:40:55,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:55,764 INFO L93 Difference]: Finished difference Result 82 states and 128 transitions. [2020-10-16 11:40:55,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 11:40:55,764 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 45 [2020-10-16 11:40:55,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:55,765 INFO L225 Difference]: With dead ends: 82 [2020-10-16 11:40:55,765 INFO L226 Difference]: Without dead ends: 82 [2020-10-16 11:40:55,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=818, Invalid=822, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 11:40:55,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-16 11:40:55,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-16 11:40:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:40:55,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 128 transitions. [2020-10-16 11:40:55,768 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 128 transitions. Word has length 45 [2020-10-16 11:40:55,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:55,769 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 128 transitions. [2020-10-16 11:40:55,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-16 11:40:55,769 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 128 transitions. [2020-10-16 11:40:55,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-16 11:40:55,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:55,772 INFO L422 BasicCegarLoop]: trace histogram [37, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:40:55,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 11:40:55,981 INFO L429 AbstractCegarLoop]: === Iteration 41 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:40:55,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:55,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1927262600, now seen corresponding path program 35 times [2020-10-16 11:40:55,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:55,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704574038] [2020-10-16 11:40:55,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:40:56,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704574038] [2020-10-16 11:40:56,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597311687] [2020-10-16 11:40:56,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:41:30,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-10-16 11:41:30,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:31,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-16 11:41:31,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:41:31,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:31,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2020-10-16 11:41:31,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301230676] [2020-10-16 11:41:31,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-16 11:41:31,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:31,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-16 11:41:31,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=859, Invalid=863, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:41:31,671 INFO L87 Difference]: Start difference. First operand 82 states and 128 transitions. Second operand 42 states. [2020-10-16 11:41:31,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:31,742 INFO L93 Difference]: Finished difference Result 83 states and 129 transitions. [2020-10-16 11:41:31,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:41:31,743 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2020-10-16 11:41:31,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:31,744 INFO L225 Difference]: With dead ends: 83 [2020-10-16 11:41:31,744 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 11:41:31,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=859, Invalid=863, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:41:31,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 11:41:31,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-16 11:41:31,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 11:41:31,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 129 transitions. [2020-10-16 11:41:31,747 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 129 transitions. Word has length 46 [2020-10-16 11:41:31,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:31,748 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 129 transitions. [2020-10-16 11:41:31,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-16 11:41:31,748 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 129 transitions. [2020-10-16 11:41:31,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-16 11:41:31,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:31,749 INFO L422 BasicCegarLoop]: trace histogram [38, 2, 2, 1, 1, 1, 1, 1] [2020-10-16 11:41:31,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:31,961 INFO L429 AbstractCegarLoop]: === Iteration 42 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 11:41:31,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:31,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1044286961, now seen corresponding path program 36 times [2020-10-16 11:41:31,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:31,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881841918] [2020-10-16 11:41:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:41:32,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881841918] [2020-10-16 11:41:32,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310790951] [2020-10-16 11:41:32,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown