/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/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf -i ../../../trunk/examples/svcomp/pthread/stack_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 23:01:45,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 23:01:45,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 23:01:45,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 23:01:45,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 23:01:45,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 23:01:45,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 23:01:45,838 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 23:01:45,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 23:01:45,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 23:01:45,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 23:01:45,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 23:01:45,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 23:01:45,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 23:01:45,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 23:01:45,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 23:01:45,853 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 23:01:45,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 23:01:45,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 23:01:45,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 23:01:45,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 23:01:45,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 23:01:45,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 23:01:45,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 23:01:45,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 23:01:45,870 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 23:01:45,871 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 23:01:45,872 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 23:01:45,874 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 23:01:45,875 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 23:01:45,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 23:01:45,876 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 23:01:45,876 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 23:01:45,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 23:01:45,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 23:01:45,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 23:01:45,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 23:01:45,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 23:01:45,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 23:01:45,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 23:01:45,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 23:01:45,885 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf [2020-04-17 23:01:45,921 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 23:01:45,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 23:01:45,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 23:01:45,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 23:01:45,923 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 23:01:45,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 23:01:45,923 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 23:01:45,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 23:01:45,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 23:01:45,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 23:01:45,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 23:01:45,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 23:01:45,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 23:01:45,928 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 23:01:45,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 23:01:45,929 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 23:01:45,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 23:01:45,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 23:01:45,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 23:01:45,930 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 23:01:45,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 23:01:45,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 23:01:45,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 23:01:45,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 23:01:45,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 23:01:45,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 23:01:45,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 23:01:45,931 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-04-17 23:01:45,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 23:01:45,931 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 23:01:46,211 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 23:01:46,222 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 23:01:46,226 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 23:01:46,228 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 23:01:46,228 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 23:01:46,229 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-2.i [2020-04-17 23:01:46,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/497bc7462/f4e0c310022c47bea34698e7dc6b87ab/FLAG79bb029fe [2020-04-17 23:01:46,814 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 23:01:46,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i [2020-04-17 23:01:46,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/497bc7462/f4e0c310022c47bea34698e7dc6b87ab/FLAG79bb029fe [2020-04-17 23:01:47,104 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/497bc7462/f4e0c310022c47bea34698e7dc6b87ab [2020-04-17 23:01:47,112 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 23:01:47,128 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 23:01:47,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 23:01:47,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 23:01:47,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 23:01:47,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 11:01:47" (1/1) ... [2020-04-17 23:01:47,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ee12d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:01:47, skipping insertion in model container [2020-04-17 23:01:47,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 11:01:47" (1/1) ... [2020-04-17 23:01:47,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 23:01:47,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 23:01:47,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 23:01:47,746 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 23:01:47,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 23:01:47,979 INFO L208 MainTranslator]: Completed translation [2020-04-17 23:01:47,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:01:47 WrapperNode [2020-04-17 23:01:47,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 23:01:47,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 23:01:47,982 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 23:01:47,982 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 23:01:47,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:01:47" (1/1) ... [2020-04-17 23:01:48,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:01:47" (1/1) ... [2020-04-17 23:01:48,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 23:01:48,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 23:01:48,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 23:01:48,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 23:01:48,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:01:47" (1/1) ... [2020-04-17 23:01:48,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:01:47" (1/1) ... [2020-04-17 23:01:48,097 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:01:47" (1/1) ... [2020-04-17 23:01:48,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:01:47" (1/1) ... [2020-04-17 23:01:48,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:01:47" (1/1) ... [2020-04-17 23:01:48,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:01:47" (1/1) ... [2020-04-17 23:01:48,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:01:47" (1/1) ... [2020-04-17 23:01:48,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 23:01:48,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 23:01:48,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 23:01:48,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 23:01:48,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:01:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 23:01:48,198 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-17 23:01:48,199 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-17 23:01:48,199 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-17 23:01:48,199 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-17 23:01:48,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 23:01:48,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 23:01:48,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-04-17 23:01:48,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 23:01:48,200 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-04-17 23:01:48,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-04-17 23:01:48,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 23:01:48,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 23:01:48,202 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 23:01:48,748 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 23:01:48,749 INFO L295 CfgBuilder]: Removed 24 assume(true) statements. [2020-04-17 23:01:48,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 11:01:48 BoogieIcfgContainer [2020-04-17 23:01:48,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 23:01:48,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 23:01:48,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 23:01:48,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 23:01:48,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 11:01:47" (1/3) ... [2020-04-17 23:01:48,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c0b0e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 11:01:48, skipping insertion in model container [2020-04-17 23:01:48,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:01:47" (2/3) ... [2020-04-17 23:01:48,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c0b0e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 11:01:48, skipping insertion in model container [2020-04-17 23:01:48,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 11:01:48" (3/3) ... [2020-04-17 23:01:48,768 INFO L109 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2020-04-17 23:01:48,779 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 23:01:48,779 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 23:01:48,789 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-04-17 23:01:48,790 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 23:01:48,841 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,842 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,842 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,842 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,843 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,843 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,843 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,843 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,843 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,844 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,844 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,844 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,844 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,844 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,844 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,845 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,845 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,845 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,845 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,845 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,845 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,845 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,846 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,846 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,846 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,846 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,846 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,847 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,847 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,847 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~nondet33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,847 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,847 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~ret35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,848 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,848 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,848 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,848 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,848 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,848 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,849 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,849 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~nondet33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,849 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,849 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,850 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,850 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,850 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,850 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,850 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~ret35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,851 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,851 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~ret35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,851 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,851 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,851 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,852 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,852 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,852 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~ret35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,852 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,852 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,853 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~ret35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,853 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_inc_top_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,853 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,853 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,853 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_inc_top_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,854 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,854 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,854 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_inc_top_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,854 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,854 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_inc_top_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,855 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,856 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,856 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,856 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,856 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,856 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,857 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,857 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,857 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,857 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,858 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,858 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,858 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,858 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,859 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,859 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,859 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,859 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,860 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,860 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,860 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,860 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,860 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~mem39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,860 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,861 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,861 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,861 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,861 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,861 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,862 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,862 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,862 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_dec_top_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,862 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,862 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_dec_top_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,863 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,863 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,863 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_dec_top_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,863 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,864 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_dec_top_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,864 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,864 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,864 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,865 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,865 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,865 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,865 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,866 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,866 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,866 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,866 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,866 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,867 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~mem39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,867 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~mem39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,867 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,867 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,867 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~mem39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,871 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,871 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,871 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,871 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,872 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_inc_top_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,872 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,872 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,872 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~ret35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,872 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,872 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,873 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#t~nondet33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,873 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,873 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,873 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,873 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,874 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,874 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,874 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,874 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,874 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,875 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,875 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,875 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,881 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,881 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,881 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,881 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,882 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,882 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,882 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,882 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_dec_top_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,882 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,883 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,883 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,883 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,883 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,883 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#t~mem39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,884 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,884 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,884 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,884 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:01:48,905 INFO L251 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-04-17 23:01:48,926 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 23:01:48,926 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 23:01:48,926 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 23:01:48,926 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 23:01:48,926 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 23:01:48,926 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 23:01:48,927 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 23:01:48,928 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 23:01:48,953 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 138 transitions, 298 flow [2020-04-17 23:01:48,955 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 133 places, 138 transitions, 298 flow [2020-04-17 23:01:49,032 INFO L129 PetriNetUnfolder]: 11/138 cut-off events. [2020-04-17 23:01:49,033 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-04-17 23:01:49,041 INFO L80 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 138 events. 11/138 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 342 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 106. Up to 3 conditions per place. [2020-04-17 23:01:49,048 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 133 places, 138 transitions, 298 flow [2020-04-17 23:01:49,081 INFO L129 PetriNetUnfolder]: 11/138 cut-off events. [2020-04-17 23:01:49,081 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-04-17 23:01:49,083 INFO L80 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 138 events. 11/138 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 342 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 106. Up to 3 conditions per place. [2020-04-17 23:01:49,090 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 5744 [2020-04-17 23:01:49,091 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-17 23:01:50,821 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-04-17 23:01:51,918 WARN L192 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 99 [2020-04-17 23:01:52,101 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-04-17 23:01:52,433 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-04-17 23:01:52,651 WARN L192 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-04-17 23:01:52,662 INFO L206 etLargeBlockEncoding]: Checked pairs total: 7699 [2020-04-17 23:01:52,662 INFO L214 etLargeBlockEncoding]: Total number of compositions: 118 [2020-04-17 23:01:52,668 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 40 transitions, 102 flow [2020-04-17 23:01:52,691 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 331 states. [2020-04-17 23:01:52,693 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states. [2020-04-17 23:01:52,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-17 23:01:52,698 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:52,699 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-17 23:01:52,700 INFO L427 AbstractCegarLoop]: === Iteration 1 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:52,706 INFO L82 PathProgramCache]: Analyzing trace with hash -290275557, now seen corresponding path program 1 times [2020-04-17 23:01:52,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:52,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940080074] [2020-04-17 23:01:52,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:53,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940080074] [2020-04-17 23:01:53,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:01:53,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 23:01:53,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296716715] [2020-04-17 23:01:53,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 23:01:53,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:53,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 23:01:53,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 23:01:53,058 INFO L87 Difference]: Start difference. First operand 331 states. Second operand 3 states. [2020-04-17 23:01:53,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:53,169 INFO L93 Difference]: Finished difference Result 504 states and 1247 transitions. [2020-04-17 23:01:53,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 23:01:53,174 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-04-17 23:01:53,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:53,206 INFO L225 Difference]: With dead ends: 504 [2020-04-17 23:01:53,206 INFO L226 Difference]: Without dead ends: 460 [2020-04-17 23:01:53,207 INFO L678 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 [2020-04-17 23:01:53,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-04-17 23:01:53,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 420. [2020-04-17 23:01:53,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-04-17 23:01:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1095 transitions. [2020-04-17 23:01:53,294 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1095 transitions. Word has length 6 [2020-04-17 23:01:53,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:53,294 INFO L479 AbstractCegarLoop]: Abstraction has 420 states and 1095 transitions. [2020-04-17 23:01:53,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 23:01:53,295 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1095 transitions. [2020-04-17 23:01:53,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 23:01:53,297 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:53,297 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:53,297 INFO L427 AbstractCegarLoop]: === Iteration 2 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:53,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:53,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1518668221, now seen corresponding path program 1 times [2020-04-17 23:01:53,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:53,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110760699] [2020-04-17 23:01:53,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:53,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110760699] [2020-04-17 23:01:53,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:01:53,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 23:01:53,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115207081] [2020-04-17 23:01:53,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 23:01:53,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:53,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 23:01:53,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 23:01:53,384 INFO L87 Difference]: Start difference. First operand 420 states and 1095 transitions. Second operand 3 states. [2020-04-17 23:01:53,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:53,413 INFO L93 Difference]: Finished difference Result 464 states and 1205 transitions. [2020-04-17 23:01:53,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 23:01:53,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-04-17 23:01:53,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:53,419 INFO L225 Difference]: With dead ends: 464 [2020-04-17 23:01:53,420 INFO L226 Difference]: Without dead ends: 464 [2020-04-17 23:01:53,421 INFO L678 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 [2020-04-17 23:01:53,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2020-04-17 23:01:53,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 464. [2020-04-17 23:01:53,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-04-17 23:01:53,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1205 transitions. [2020-04-17 23:01:53,459 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1205 transitions. Word has length 10 [2020-04-17 23:01:53,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:53,460 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 1205 transitions. [2020-04-17 23:01:53,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 23:01:53,460 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1205 transitions. [2020-04-17 23:01:53,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:01:53,464 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:53,464 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:53,464 INFO L427 AbstractCegarLoop]: === Iteration 3 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:53,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:53,464 INFO L82 PathProgramCache]: Analyzing trace with hash 542344755, now seen corresponding path program 1 times [2020-04-17 23:01:53,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:53,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599969244] [2020-04-17 23:01:53,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:53,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599969244] [2020-04-17 23:01:53,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550555798] [2020-04-17 23:01:53,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:53,628 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 23:01:53,633 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:53,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:53,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-04-17 23:01:53,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034476361] [2020-04-17 23:01:53,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 23:01:53,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:53,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 23:01:53,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-04-17 23:01:53,659 INFO L87 Difference]: Start difference. First operand 464 states and 1205 transitions. Second operand 7 states. [2020-04-17 23:01:53,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:53,802 INFO L93 Difference]: Finished difference Result 866 states and 2152 transitions. [2020-04-17 23:01:53,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 23:01:53,802 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-04-17 23:01:53,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:53,808 INFO L225 Difference]: With dead ends: 866 [2020-04-17 23:01:53,808 INFO L226 Difference]: Without dead ends: 851 [2020-04-17 23:01:53,809 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:01:53,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2020-04-17 23:01:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 575. [2020-04-17 23:01:53,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2020-04-17 23:01:53,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1484 transitions. [2020-04-17 23:01:53,832 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1484 transitions. Word has length 13 [2020-04-17 23:01:53,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:53,832 INFO L479 AbstractCegarLoop]: Abstraction has 575 states and 1484 transitions. [2020-04-17 23:01:53,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 23:01:53,833 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1484 transitions. [2020-04-17 23:01:53,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:01:53,835 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:53,835 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:54,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:54,049 INFO L427 AbstractCegarLoop]: === Iteration 4 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:54,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:54,049 INFO L82 PathProgramCache]: Analyzing trace with hash 843892794, now seen corresponding path program 1 times [2020-04-17 23:01:54,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:54,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333982771] [2020-04-17 23:01:54,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:54,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333982771] [2020-04-17 23:01:54,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:01:54,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 23:01:54,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288512246] [2020-04-17 23:01:54,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 23:01:54,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:54,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 23:01:54,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 23:01:54,106 INFO L87 Difference]: Start difference. First operand 575 states and 1484 transitions. Second operand 3 states. [2020-04-17 23:01:54,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:54,126 INFO L93 Difference]: Finished difference Result 304 states and 670 transitions. [2020-04-17 23:01:54,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 23:01:54,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-04-17 23:01:54,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:54,128 INFO L225 Difference]: With dead ends: 304 [2020-04-17 23:01:54,129 INFO L226 Difference]: Without dead ends: 304 [2020-04-17 23:01:54,129 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 23:01:54,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-04-17 23:01:54,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 294. [2020-04-17 23:01:54,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-04-17 23:01:54,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 643 transitions. [2020-04-17 23:01:54,137 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 643 transitions. Word has length 16 [2020-04-17 23:01:54,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:54,137 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 643 transitions. [2020-04-17 23:01:54,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 23:01:54,138 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 643 transitions. [2020-04-17 23:01:54,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:01:54,139 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:54,140 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:54,140 INFO L427 AbstractCegarLoop]: === Iteration 5 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:54,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:54,140 INFO L82 PathProgramCache]: Analyzing trace with hash -960478475, now seen corresponding path program 1 times [2020-04-17 23:01:54,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:54,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175783020] [2020-04-17 23:01:54,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:54,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175783020] [2020-04-17 23:01:54,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:01:54,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 23:01:54,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230861686] [2020-04-17 23:01:54,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 23:01:54,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:54,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 23:01:54,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 23:01:54,183 INFO L87 Difference]: Start difference. First operand 294 states and 643 transitions. Second operand 3 states. [2020-04-17 23:01:54,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:54,234 INFO L93 Difference]: Finished difference Result 372 states and 811 transitions. [2020-04-17 23:01:54,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 23:01:54,234 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-04-17 23:01:54,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:54,237 INFO L225 Difference]: With dead ends: 372 [2020-04-17 23:01:54,237 INFO L226 Difference]: Without dead ends: 372 [2020-04-17 23:01:54,237 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 23:01:54,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-04-17 23:01:54,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 295. [2020-04-17 23:01:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-04-17 23:01:54,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 647 transitions. [2020-04-17 23:01:54,247 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 647 transitions. Word has length 17 [2020-04-17 23:01:54,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:54,248 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 647 transitions. [2020-04-17 23:01:54,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 23:01:54,248 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 647 transitions. [2020-04-17 23:01:54,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:01:54,250 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:54,250 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-04-17 23:01:54,250 INFO L427 AbstractCegarLoop]: === Iteration 6 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:54,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:54,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1582230501, now seen corresponding path program 2 times [2020-04-17 23:01:54,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:54,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938189475] [2020-04-17 23:01:54,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:54,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938189475] [2020-04-17 23:01:54,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208946807] [2020-04-17 23:01:54,362 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:54,461 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:01:54,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:54,463 INFO L264 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-17 23:01:54,466 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:54,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:54,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-04-17 23:01:54,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551355387] [2020-04-17 23:01:54,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:01:54,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:54,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:01:54,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:01:54,501 INFO L87 Difference]: Start difference. First operand 295 states and 647 transitions. Second operand 10 states. [2020-04-17 23:01:54,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:54,658 INFO L93 Difference]: Finished difference Result 542 states and 1156 transitions. [2020-04-17 23:01:54,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:01:54,658 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-04-17 23:01:54,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:54,662 INFO L225 Difference]: With dead ends: 542 [2020-04-17 23:01:54,662 INFO L226 Difference]: Without dead ends: 542 [2020-04-17 23:01:54,663 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:01:54,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2020-04-17 23:01:54,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 372. [2020-04-17 23:01:54,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-04-17 23:01:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 816 transitions. [2020-04-17 23:01:54,674 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 816 transitions. Word has length 20 [2020-04-17 23:01:54,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:54,674 INFO L479 AbstractCegarLoop]: Abstraction has 372 states and 816 transitions. [2020-04-17 23:01:54,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:01:54,675 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 816 transitions. [2020-04-17 23:01:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:01:54,676 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:54,676 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:54,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:54,884 INFO L427 AbstractCegarLoop]: === Iteration 7 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:54,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:54,884 INFO L82 PathProgramCache]: Analyzing trace with hash 69417077, now seen corresponding path program 1 times [2020-04-17 23:01:54,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:54,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976549008] [2020-04-17 23:01:54,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:55,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976549008] [2020-04-17 23:01:55,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:01:55,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-04-17 23:01:55,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788503285] [2020-04-17 23:01:55,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:01:55,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:55,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:01:55,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:01:55,249 INFO L87 Difference]: Start difference. First operand 372 states and 816 transitions. Second operand 11 states. [2020-04-17 23:01:55,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:55,842 INFO L93 Difference]: Finished difference Result 643 states and 1378 transitions. [2020-04-17 23:01:55,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 23:01:55,842 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-04-17 23:01:55,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:55,846 INFO L225 Difference]: With dead ends: 643 [2020-04-17 23:01:55,846 INFO L226 Difference]: Without dead ends: 581 [2020-04-17 23:01:55,847 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:01:55,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2020-04-17 23:01:55,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 416. [2020-04-17 23:01:55,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-04-17 23:01:55,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 916 transitions. [2020-04-17 23:01:55,859 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 916 transitions. Word has length 21 [2020-04-17 23:01:55,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:55,859 INFO L479 AbstractCegarLoop]: Abstraction has 416 states and 916 transitions. [2020-04-17 23:01:55,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:01:55,860 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 916 transitions. [2020-04-17 23:01:55,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:01:55,861 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:55,861 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:55,861 INFO L427 AbstractCegarLoop]: === Iteration 8 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:55,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:55,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2126692033, now seen corresponding path program 1 times [2020-04-17 23:01:55,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:55,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334351100] [2020-04-17 23:01:55,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:55,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334351100] [2020-04-17 23:01:55,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347952517] [2020-04-17 23:01:55,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:56,007 INFO L264 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-17 23:01:56,009 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 23:01:56,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 23:01:56,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2020-04-17 23:01:56,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073499156] [2020-04-17 23:01:56,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 23:01:56,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:56,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 23:01:56,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-04-17 23:01:56,028 INFO L87 Difference]: Start difference. First operand 416 states and 916 transitions. Second operand 6 states. [2020-04-17 23:01:56,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:56,097 INFO L93 Difference]: Finished difference Result 576 states and 1231 transitions. [2020-04-17 23:01:56,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 23:01:56,097 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-04-17 23:01:56,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:56,100 INFO L225 Difference]: With dead ends: 576 [2020-04-17 23:01:56,101 INFO L226 Difference]: Without dead ends: 566 [2020-04-17 23:01:56,101 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:01:56,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2020-04-17 23:01:56,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 476. [2020-04-17 23:01:56,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-04-17 23:01:56,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1042 transitions. [2020-04-17 23:01:56,114 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1042 transitions. Word has length 24 [2020-04-17 23:01:56,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:56,114 INFO L479 AbstractCegarLoop]: Abstraction has 476 states and 1042 transitions. [2020-04-17 23:01:56,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 23:01:56,115 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1042 transitions. [2020-04-17 23:01:56,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:01:56,116 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:56,116 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2020-04-17 23:01:56,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:56,319 INFO L427 AbstractCegarLoop]: === Iteration 9 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:56,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:56,320 INFO L82 PathProgramCache]: Analyzing trace with hash 2004586803, now seen corresponding path program 3 times [2020-04-17 23:01:56,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:56,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646274012] [2020-04-17 23:01:56,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:56,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646274012] [2020-04-17 23:01:56,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014058117] [2020-04-17 23:01:56,429 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:56,528 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 23:01:56,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:56,529 INFO L264 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 23:01:56,531 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:56,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:56,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2020-04-17 23:01:56,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652563383] [2020-04-17 23:01:56,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:01:56,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:56,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:01:56,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:01:56,566 INFO L87 Difference]: Start difference. First operand 476 states and 1042 transitions. Second operand 13 states. [2020-04-17 23:01:56,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:56,765 INFO L93 Difference]: Finished difference Result 789 states and 1669 transitions. [2020-04-17 23:01:56,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:01:56,765 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-04-17 23:01:56,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:56,769 INFO L225 Difference]: With dead ends: 789 [2020-04-17 23:01:56,769 INFO L226 Difference]: Without dead ends: 789 [2020-04-17 23:01:56,770 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:01:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2020-04-17 23:01:56,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 553. [2020-04-17 23:01:56,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-04-17 23:01:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1211 transitions. [2020-04-17 23:01:56,786 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1211 transitions. Word has length 27 [2020-04-17 23:01:56,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:56,787 INFO L479 AbstractCegarLoop]: Abstraction has 553 states and 1211 transitions. [2020-04-17 23:01:56,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:01:56,787 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1211 transitions. [2020-04-17 23:01:56,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:01:56,788 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:56,789 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:56,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:56,996 INFO L427 AbstractCegarLoop]: === Iteration 10 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:56,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:56,997 INFO L82 PathProgramCache]: Analyzing trace with hash -408396195, now seen corresponding path program 2 times [2020-04-17 23:01:56,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:56,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874147609] [2020-04-17 23:01:56,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 23:01:57,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874147609] [2020-04-17 23:01:57,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701365843] [2020-04-17 23:01:57,441 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:57,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-17 23:01:57,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:57,519 INFO L264 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 48 conjunts are in the unsatisfiable core [2020-04-17 23:01:57,522 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:57,597 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:01:57,598 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 485 treesize of output 481 [2020-04-17 23:01:57,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:57,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:57,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:57,605 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:57,606 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:57,617 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:01:57,766 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 24 [2020-04-17 23:01:57,767 INFO L619 ElimStorePlain]: treesize reduction 2396, result has 1.2 percent of original size [2020-04-17 23:01:57,768 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-17 23:01:57,769 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:4 [2020-04-17 23:01:57,965 INFO L377 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 17 treesize of output 13 [2020-04-17 23:01:57,965 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:01:57,972 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:01:57,973 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:01:57,973 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2020-04-17 23:01:58,164 INFO L377 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2020-04-17 23:01:58,166 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:01:58,175 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:01:58,176 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-04-17 23:01:58,176 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:31 [2020-04-17 23:01:58,527 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:58,539 INFO L377 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 19 [2020-04-17 23:01:58,540 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:01:58,544 INFO L377 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2020-04-17 23:01:58,545 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 23:01:58,568 INFO L619 ElimStorePlain]: treesize reduction 28, result has 34.9 percent of original size [2020-04-17 23:01:58,568 INFO L539 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:01:58,569 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:116, output treesize:11 [2020-04-17 23:01:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 23:01:58,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 23:01:58,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14] total 27 [2020-04-17 23:01:58,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764334364] [2020-04-17 23:01:58,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:01:58,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:58,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:01:58,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2020-04-17 23:01:58,643 INFO L87 Difference]: Start difference. First operand 553 states and 1211 transitions. Second operand 15 states. [2020-04-17 23:02:02,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:02,433 INFO L93 Difference]: Finished difference Result 1207 states and 2573 transitions. [2020-04-17 23:02:02,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 23:02:02,434 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-04-17 23:02:02,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:02,440 INFO L225 Difference]: With dead ends: 1207 [2020-04-17 23:02:02,440 INFO L226 Difference]: Without dead ends: 1167 [2020-04-17 23:02:02,441 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=386, Invalid=2806, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 23:02:02,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2020-04-17 23:02:02,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 657. [2020-04-17 23:02:02,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2020-04-17 23:02:02,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1465 transitions. [2020-04-17 23:02:02,461 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1465 transitions. Word has length 28 [2020-04-17 23:02:02,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:02,461 INFO L479 AbstractCegarLoop]: Abstraction has 657 states and 1465 transitions. [2020-04-17 23:02:02,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:02,461 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1465 transitions. [2020-04-17 23:02:02,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-04-17 23:02:02,463 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:02,463 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:02,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:02,666 INFO L427 AbstractCegarLoop]: === Iteration 11 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:02,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:02,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1113124825, now seen corresponding path program 2 times [2020-04-17 23:02:02,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:02,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753854138] [2020-04-17 23:02:02,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 23:02:02,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753854138] [2020-04-17 23:02:02,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698117566] [2020-04-17 23:02:02,751 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:02,840 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:02,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:02,842 INFO L264 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 23:02:02,844 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 23:02:02,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:02,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-04-17 23:02:02,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262422491] [2020-04-17 23:02:02,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:02,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:02,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:02,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:02,887 INFO L87 Difference]: Start difference. First operand 657 states and 1465 transitions. Second operand 11 states. [2020-04-17 23:02:03,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:03,065 INFO L93 Difference]: Finished difference Result 1031 states and 2213 transitions. [2020-04-17 23:02:03,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 23:02:03,066 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-04-17 23:02:03,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:03,071 INFO L225 Difference]: With dead ends: 1031 [2020-04-17 23:02:03,071 INFO L226 Difference]: Without dead ends: 1031 [2020-04-17 23:02:03,072 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:02:03,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2020-04-17 23:02:03,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 701. [2020-04-17 23:02:03,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701 states. [2020-04-17 23:02:03,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1589 transitions. [2020-04-17 23:02:03,091 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1589 transitions. Word has length 31 [2020-04-17 23:02:03,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:03,091 INFO L479 AbstractCegarLoop]: Abstraction has 701 states and 1589 transitions. [2020-04-17 23:02:03,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:03,092 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1589 transitions. [2020-04-17 23:02:03,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-04-17 23:02:03,093 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:03,093 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2020-04-17 23:02:03,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:03,297 INFO L427 AbstractCegarLoop]: === Iteration 12 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:03,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:03,298 INFO L82 PathProgramCache]: Analyzing trace with hash 443984155, now seen corresponding path program 4 times [2020-04-17 23:02:03,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:03,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456326813] [2020-04-17 23:02:03,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:03,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456326813] [2020-04-17 23:02:03,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750591549] [2020-04-17 23:02:03,447 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:03,557 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:03,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:03,558 INFO L264 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:03,560 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:03,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:03,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2020-04-17 23:02:03,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259704956] [2020-04-17 23:02:03,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:02:03,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:03,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:02:03,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:02:03,589 INFO L87 Difference]: Start difference. First operand 701 states and 1589 transitions. Second operand 16 states. [2020-04-17 23:02:03,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:03,784 INFO L93 Difference]: Finished difference Result 1183 states and 2570 transitions. [2020-04-17 23:02:03,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:02:03,784 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-04-17 23:02:03,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:03,790 INFO L225 Difference]: With dead ends: 1183 [2020-04-17 23:02:03,790 INFO L226 Difference]: Without dead ends: 1183 [2020-04-17 23:02:03,791 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:02:03,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2020-04-17 23:02:03,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 792. [2020-04-17 23:02:03,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-04-17 23:02:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1797 transitions. [2020-04-17 23:02:03,812 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1797 transitions. Word has length 34 [2020-04-17 23:02:03,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:03,812 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1797 transitions. [2020-04-17 23:02:03,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:02:03,812 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1797 transitions. [2020-04-17 23:02:03,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-04-17 23:02:03,814 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:03,814 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:04,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:04,019 INFO L427 AbstractCegarLoop]: === Iteration 13 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:04,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:04,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1975916590, now seen corresponding path program 1 times [2020-04-17 23:02:04,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:04,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920286904] [2020-04-17 23:02:04,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:05,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920286904] [2020-04-17 23:02:05,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605237334] [2020-04-17 23:02:05,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:05,223 INFO L264 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 73 conjunts are in the unsatisfiable core [2020-04-17 23:02:05,263 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:05,275 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:02:05,275 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 619 treesize of output 593 [2020-04-17 23:02:05,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:05,277 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:05,278 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:05,278 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:05,279 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:05,280 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:05,280 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:05,281 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:05,281 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:05,282 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:05,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:05,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:05,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:05,288 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2020-04-17 23:02:05,485 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 29 [2020-04-17 23:02:05,486 INFO L619 ElimStorePlain]: treesize reduction 1521, result has 2.1 percent of original size [2020-04-17 23:02:05,487 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-17 23:02:05,487 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:8 [2020-04-17 23:02:05,682 INFO L377 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 17 treesize of output 13 [2020-04-17 23:02:05,682 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:02:05,691 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:02:05,692 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:02:05,692 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:26 [2020-04-17 23:02:06,000 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-04-17 23:02:06,002 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2020-04-17 23:02:06,003 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:02:06,018 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:02:06,019 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:02:06,019 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:27 [2020-04-17 23:02:06,134 INFO L377 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-04-17 23:02:06,135 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:02:06,148 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:02:06,149 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-04-17 23:02:06,149 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:33, output treesize:29 [2020-04-17 23:02:06,690 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:06,700 INFO L377 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2020-04-17 23:02:06,701 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:02:06,706 INFO L377 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2020-04-17 23:02:06,707 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 23:02:06,726 INFO L619 ElimStorePlain]: treesize reduction 28, result has 34.9 percent of original size [2020-04-17 23:02:06,726 INFO L539 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:02:06,727 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:92, output treesize:11 [2020-04-17 23:02:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:06,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:06,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19] total 43 [2020-04-17 23:02:06,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483625122] [2020-04-17 23:02:06,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-04-17 23:02:06,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:06,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-04-17 23:02:06,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1823, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 23:02:06,813 INFO L87 Difference]: Start difference. First operand 792 states and 1797 transitions. Second operand 45 states. [2020-04-17 23:02:09,901 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 47 [2020-04-17 23:02:10,114 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2020-04-17 23:02:14,446 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 41 [2020-04-17 23:02:18,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:18,353 INFO L93 Difference]: Finished difference Result 2458 states and 5240 transitions. [2020-04-17 23:02:18,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-04-17 23:02:18,353 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 36 [2020-04-17 23:02:18,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:18,363 INFO L225 Difference]: With dead ends: 2458 [2020-04-17 23:02:18,364 INFO L226 Difference]: Without dead ends: 2296 [2020-04-17 23:02:18,367 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3363 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1263, Invalid=10727, Unknown=0, NotChecked=0, Total=11990 [2020-04-17 23:02:18,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2020-04-17 23:02:18,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1167. [2020-04-17 23:02:18,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1167 states. [2020-04-17 23:02:18,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 2687 transitions. [2020-04-17 23:02:18,402 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 2687 transitions. Word has length 36 [2020-04-17 23:02:18,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:18,402 INFO L479 AbstractCegarLoop]: Abstraction has 1167 states and 2687 transitions. [2020-04-17 23:02:18,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-04-17 23:02:18,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 2687 transitions. [2020-04-17 23:02:18,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-04-17 23:02:18,405 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:18,405 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:18,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:18,608 INFO L427 AbstractCegarLoop]: === Iteration 14 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:18,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:18,609 INFO L82 PathProgramCache]: Analyzing trace with hash 460075742, now seen corresponding path program 2 times [2020-04-17 23:02:18,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:18,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311193212] [2020-04-17 23:02:18,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:19,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311193212] [2020-04-17 23:02:19,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997821388] [2020-04-17 23:02:19,404 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:19,473 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-17 23:02:19,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:19,474 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2020-04-17 23:02:19,477 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:19,581 INFO L377 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 17 treesize of output 13 [2020-04-17 23:02:19,582 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:02:19,586 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:02:19,587 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:02:19,587 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:19 [2020-04-17 23:02:19,993 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:19,999 INFO L377 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 53 treesize of output 21 [2020-04-17 23:02:20,000 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:02:20,003 INFO L377 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 56 treesize of output 24 [2020-04-17 23:02:20,004 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:02:20,027 INFO L619 ElimStorePlain]: treesize reduction 30, result has 34.8 percent of original size [2020-04-17 23:02:20,028 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:02:20,028 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:110, output treesize:16 [2020-04-17 23:02:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 23:02:20,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 23:02:20,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [14] total 25 [2020-04-17 23:02:20,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153029482] [2020-04-17 23:02:20,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:20,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:20,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:20,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:02:20,074 INFO L87 Difference]: Start difference. First operand 1167 states and 2687 transitions. Second operand 13 states. [2020-04-17 23:02:23,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:23,837 INFO L93 Difference]: Finished difference Result 1704 states and 3785 transitions. [2020-04-17 23:02:23,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:02:23,838 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-04-17 23:02:23,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:23,845 INFO L225 Difference]: With dead ends: 1704 [2020-04-17 23:02:23,846 INFO L226 Difference]: Without dead ends: 1664 [2020-04-17 23:02:23,847 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=324, Invalid=1932, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 23:02:23,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2020-04-17 23:02:23,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 925. [2020-04-17 23:02:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 925 states. [2020-04-17 23:02:23,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2085 transitions. [2020-04-17 23:02:23,869 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2085 transitions. Word has length 36 [2020-04-17 23:02:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:23,870 INFO L479 AbstractCegarLoop]: Abstraction has 925 states and 2085 transitions. [2020-04-17 23:02:23,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2085 transitions. [2020-04-17 23:02:23,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-04-17 23:02:23,872 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:23,872 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:24,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:24,079 INFO L427 AbstractCegarLoop]: === Iteration 15 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:24,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:24,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1085658049, now seen corresponding path program 3 times [2020-04-17 23:02:24,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:24,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925168829] [2020-04-17 23:02:24,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 23:02:24,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925168829] [2020-04-17 23:02:24,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015719650] [2020-04-17 23:02:24,200 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:24,304 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 23:02:24,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:24,305 INFO L264 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:24,313 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-04-17 23:02:24,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 23:02:24,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2020-04-17 23:02:24,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332022720] [2020-04-17 23:02:24,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 23:02:24,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:24,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 23:02:24,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:02:24,381 INFO L87 Difference]: Start difference. First operand 925 states and 2085 transitions. Second operand 6 states. [2020-04-17 23:02:24,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:24,488 INFO L93 Difference]: Finished difference Result 1241 states and 2735 transitions. [2020-04-17 23:02:24,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 23:02:24,488 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-04-17 23:02:24,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:24,494 INFO L225 Difference]: With dead ends: 1241 [2020-04-17 23:02:24,494 INFO L226 Difference]: Without dead ends: 1241 [2020-04-17 23:02:24,496 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:02:24,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-04-17 23:02:24,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 955. [2020-04-17 23:02:24,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955 states. [2020-04-17 23:02:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 2172 transitions. [2020-04-17 23:02:24,517 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 2172 transitions. Word has length 38 [2020-04-17 23:02:24,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:24,517 INFO L479 AbstractCegarLoop]: Abstraction has 955 states and 2172 transitions. [2020-04-17 23:02:24,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 23:02:24,517 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 2172 transitions. [2020-04-17 23:02:24,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-04-17 23:02:24,522 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:24,522 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:24,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:24,726 INFO L427 AbstractCegarLoop]: === Iteration 16 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:24,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:24,726 INFO L82 PathProgramCache]: Analyzing trace with hash -448635967, now seen corresponding path program 4 times [2020-04-17 23:02:24,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:24,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99601974] [2020-04-17 23:02:24,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 23:02:24,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99601974] [2020-04-17 23:02:24,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071988827] [2020-04-17 23:02:24,847 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 23:02:24,941 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:24,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:24,943 INFO L264 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:24,945 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 23:02:24,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:24,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 11 [2020-04-17 23:02:24,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669356189] [2020-04-17 23:02:24,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:24,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:24,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:24,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:24,961 INFO L87 Difference]: Start difference. First operand 955 states and 2172 transitions. Second operand 12 states. [2020-04-17 23:02:25,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:25,125 INFO L93 Difference]: Finished difference Result 1343 states and 2939 transitions. [2020-04-17 23:02:25,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 23:02:25,126 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-04-17 23:02:25,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:25,132 INFO L225 Difference]: With dead ends: 1343 [2020-04-17 23:02:25,132 INFO L226 Difference]: Without dead ends: 1343 [2020-04-17 23:02:25,133 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:02:25,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2020-04-17 23:02:25,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 955. [2020-04-17 23:02:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955 states. [2020-04-17 23:02:25,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 2172 transitions. [2020-04-17 23:02:25,188 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 2172 transitions. Word has length 38 [2020-04-17 23:02:25,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:25,188 INFO L479 AbstractCegarLoop]: Abstraction has 955 states and 2172 transitions. [2020-04-17 23:02:25,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:25,188 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 2172 transitions. [2020-04-17 23:02:25,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-04-17 23:02:25,193 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:25,193 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2020-04-17 23:02:25,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:25,399 INFO L427 AbstractCegarLoop]: === Iteration 17 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:25,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:25,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1774953421, now seen corresponding path program 5 times [2020-04-17 23:02:25,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:25,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939769850] [2020-04-17 23:02:25,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:25,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939769850] [2020-04-17 23:02:25,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576817584] [2020-04-17 23:02:25,550 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:25,684 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 23:02:25,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:25,686 INFO L264 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:25,688 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:25,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:25,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 18 [2020-04-17 23:02:25,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853861859] [2020-04-17 23:02:25,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:02:25,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:25,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:02:25,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:02:25,726 INFO L87 Difference]: Start difference. First operand 955 states and 2172 transitions. Second operand 19 states. [2020-04-17 23:02:25,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:25,923 INFO L93 Difference]: Finished difference Result 1426 states and 3114 transitions. [2020-04-17 23:02:25,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:02:25,923 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-04-17 23:02:25,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:25,930 INFO L225 Difference]: With dead ends: 1426 [2020-04-17 23:02:25,930 INFO L226 Difference]: Without dead ends: 1426 [2020-04-17 23:02:25,931 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:02:25,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2020-04-17 23:02:25,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1032. [2020-04-17 23:02:25,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-04-17 23:02:25,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 2341 transitions. [2020-04-17 23:02:25,953 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 2341 transitions. Word has length 41 [2020-04-17 23:02:25,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:25,953 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 2341 transitions. [2020-04-17 23:02:25,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:02:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 2341 transitions. [2020-04-17 23:02:25,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-04-17 23:02:25,956 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:25,956 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:26,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:26,160 INFO L427 AbstractCegarLoop]: === Iteration 18 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:26,161 INFO L82 PathProgramCache]: Analyzing trace with hash 223818986, now seen corresponding path program 3 times [2020-04-17 23:02:26,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:26,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553373536] [2020-04-17 23:02:26,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 23:02:26,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553373536] [2020-04-17 23:02:26,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468765564] [2020-04-17 23:02:26,851 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:26,958 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:02:26,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:26,960 INFO L264 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 65 conjunts are in the unsatisfiable core [2020-04-17 23:02:26,962 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:26,993 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:02:26,994 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 104 [2020-04-17 23:02:26,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:26,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:26,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:26,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:26,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:27,003 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:02:27,076 INFO L619 ElimStorePlain]: treesize reduction 216, result has 11.8 percent of original size [2020-04-17 23:02:27,077 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-17 23:02:27,077 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:4 [2020-04-17 23:02:27,221 INFO L377 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 17 treesize of output 13 [2020-04-17 23:02:27,221 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:02:27,228 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:02:27,229 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:02:27,229 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2020-04-17 23:02:27,509 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-04-17 23:02:27,510 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2020-04-17 23:02:27,510 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:02:27,546 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:02:27,547 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:02:27,547 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:45, output treesize:24 [2020-04-17 23:02:27,694 INFO L377 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2020-04-17 23:02:27,694 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:02:27,707 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:02:27,708 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-04-17 23:02:27,708 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:31 [2020-04-17 23:02:28,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:28,389 INFO L377 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2020-04-17 23:02:28,390 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:02:28,395 INFO L377 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 19 [2020-04-17 23:02:28,396 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 23:02:28,417 INFO L619 ElimStorePlain]: treesize reduction 28, result has 34.9 percent of original size [2020-04-17 23:02:28,418 INFO L539 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:02:28,418 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:116, output treesize:11 [2020-04-17 23:02:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 23:02:28,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:28,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 42 [2020-04-17 23:02:28,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302118945] [2020-04-17 23:02:28,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-04-17 23:02:28,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:28,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-04-17 23:02:28,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1754, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 23:02:28,508 INFO L87 Difference]: Start difference. First operand 1032 states and 2341 transitions. Second operand 44 states. [2020-04-17 23:02:29,700 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-04-17 23:02:29,891 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-04-17 23:02:30,321 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-04-17 23:02:30,627 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-04-17 23:02:31,266 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-04-17 23:02:32,278 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-04-17 23:02:32,515 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-04-17 23:02:33,054 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 70 [2020-04-17 23:02:33,285 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2020-04-17 23:02:33,517 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 59 [2020-04-17 23:02:33,781 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2020-04-17 23:02:34,374 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 58 [2020-04-17 23:02:34,743 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 67 [2020-04-17 23:02:35,628 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2020-04-17 23:02:35,948 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 63 [2020-04-17 23:02:36,216 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-04-17 23:02:36,744 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 73 [2020-04-17 23:02:36,940 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-04-17 23:02:40,119 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-04-17 23:02:41,060 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 44 [2020-04-17 23:02:41,416 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-04-17 23:02:41,792 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2020-04-17 23:02:42,014 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2020-04-17 23:02:42,245 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2020-04-17 23:02:42,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:42,295 INFO L93 Difference]: Finished difference Result 3900 states and 8398 transitions. [2020-04-17 23:02:42,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-04-17 23:02:42,300 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2020-04-17 23:02:42,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:42,317 INFO L225 Difference]: With dead ends: 3900 [2020-04-17 23:02:42,317 INFO L226 Difference]: Without dead ends: 3900 [2020-04-17 23:02:42,320 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1910, Invalid=9862, Unknown=0, NotChecked=0, Total=11772 [2020-04-17 23:02:42,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2020-04-17 23:02:42,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 1080. [2020-04-17 23:02:42,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-04-17 23:02:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 2490 transitions. [2020-04-17 23:02:42,355 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 2490 transitions. Word has length 43 [2020-04-17 23:02:42,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:42,355 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 2490 transitions. [2020-04-17 23:02:42,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-04-17 23:02:42,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 2490 transitions. [2020-04-17 23:02:42,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-04-17 23:02:42,357 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:42,358 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:42,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:42,562 INFO L427 AbstractCegarLoop]: === Iteration 19 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:42,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:42,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1619932717, now seen corresponding path program 4 times [2020-04-17 23:02:42,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:42,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906917687] [2020-04-17 23:02:42,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:42,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906917687] [2020-04-17 23:02:42,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547841160] [2020-04-17 23:02:42,672 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:42,773 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:42,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:42,775 INFO L264 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:42,778 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:42,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:42,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2020-04-17 23:02:42,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264092758] [2020-04-17 23:02:42,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:42,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:42,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:42,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:42,815 INFO L87 Difference]: Start difference. First operand 1080 states and 2490 transitions. Second operand 13 states. [2020-04-17 23:02:43,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:43,011 INFO L93 Difference]: Finished difference Result 1607 states and 3533 transitions. [2020-04-17 23:02:43,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:43,011 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2020-04-17 23:02:43,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:43,016 INFO L225 Difference]: With dead ends: 1607 [2020-04-17 23:02:43,017 INFO L226 Difference]: Without dead ends: 1461 [2020-04-17 23:02:43,017 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:02:43,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2020-04-17 23:02:43,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 988. [2020-04-17 23:02:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 988 states. [2020-04-17 23:02:43,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 2219 transitions. [2020-04-17 23:02:43,037 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 2219 transitions. Word has length 44 [2020-04-17 23:02:43,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:43,038 INFO L479 AbstractCegarLoop]: Abstraction has 988 states and 2219 transitions. [2020-04-17 23:02:43,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:43,038 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 2219 transitions. [2020-04-17 23:02:43,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-04-17 23:02:43,040 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:43,040 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:43,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:43,248 INFO L427 AbstractCegarLoop]: === Iteration 20 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:43,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:43,249 INFO L82 PathProgramCache]: Analyzing trace with hash 141888205, now seen corresponding path program 5 times [2020-04-17 23:02:43,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:43,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488551661] [2020-04-17 23:02:43,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 23:02:43,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488551661] [2020-04-17 23:02:43,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772459084] [2020-04-17 23:02:43,368 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:43,497 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 23:02:43,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:43,498 INFO L264 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:43,499 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 23:02:43,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:43,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 14 [2020-04-17 23:02:43,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517472385] [2020-04-17 23:02:43,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:43,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:43,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:43,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:43,518 INFO L87 Difference]: Start difference. First operand 988 states and 2219 transitions. Second operand 15 states. [2020-04-17 23:02:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:43,749 INFO L93 Difference]: Finished difference Result 1634 states and 3517 transitions. [2020-04-17 23:02:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:02:43,750 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-04-17 23:02:43,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:43,753 INFO L225 Difference]: With dead ends: 1634 [2020-04-17 23:02:43,753 INFO L226 Difference]: Without dead ends: 1634 [2020-04-17 23:02:43,753 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:02:43,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2020-04-17 23:02:43,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1062. [2020-04-17 23:02:43,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1062 states. [2020-04-17 23:02:43,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 2428 transitions. [2020-04-17 23:02:43,773 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 2428 transitions. Word has length 45 [2020-04-17 23:02:43,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:43,774 INFO L479 AbstractCegarLoop]: Abstraction has 1062 states and 2428 transitions. [2020-04-17 23:02:43,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:43,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 2428 transitions. [2020-04-17 23:02:43,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-04-17 23:02:43,776 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:43,776 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:43,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:43,980 INFO L427 AbstractCegarLoop]: === Iteration 21 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:43,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:43,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1872502873, now seen corresponding path program 6 times [2020-04-17 23:02:43,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:43,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105866803] [2020-04-17 23:02:43,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 23:02:44,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105866803] [2020-04-17 23:02:44,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164081401] [2020-04-17 23:02:44,090 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:44,231 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 23:02:44,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:44,233 INFO L264 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:44,234 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 23:02:44,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:44,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 14 [2020-04-17 23:02:44,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462649749] [2020-04-17 23:02:44,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:44,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:44,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:44,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:44,263 INFO L87 Difference]: Start difference. First operand 1062 states and 2428 transitions. Second operand 15 states. [2020-04-17 23:02:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:44,470 INFO L93 Difference]: Finished difference Result 1492 states and 3281 transitions. [2020-04-17 23:02:44,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:02:44,474 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-04-17 23:02:44,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:44,477 INFO L225 Difference]: With dead ends: 1492 [2020-04-17 23:02:44,477 INFO L226 Difference]: Without dead ends: 1492 [2020-04-17 23:02:44,478 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:02:44,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2020-04-17 23:02:44,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1094. [2020-04-17 23:02:44,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1094 states. [2020-04-17 23:02:44,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 2498 transitions. [2020-04-17 23:02:44,494 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 2498 transitions. Word has length 45 [2020-04-17 23:02:44,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:44,495 INFO L479 AbstractCegarLoop]: Abstraction has 1094 states and 2498 transitions. [2020-04-17 23:02:44,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:44,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 2498 transitions. [2020-04-17 23:02:44,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-04-17 23:02:44,497 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:44,497 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:44,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:44,702 INFO L427 AbstractCegarLoop]: === Iteration 22 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:44,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:44,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1181218125, now seen corresponding path program 7 times [2020-04-17 23:02:44,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:44,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658934136] [2020-04-17 23:02:44,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 23:02:44,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658934136] [2020-04-17 23:02:44,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462357280] [2020-04-17 23:02:44,842 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:44,935 INFO L264 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:44,937 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 23:02:44,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:44,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 14 [2020-04-17 23:02:44,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948188929] [2020-04-17 23:02:44,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:44,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:44,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:44,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:44,943 INFO L87 Difference]: Start difference. First operand 1094 states and 2498 transitions. Second operand 15 states. [2020-04-17 23:02:45,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:45,167 INFO L93 Difference]: Finished difference Result 1497 states and 3309 transitions. [2020-04-17 23:02:45,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:02:45,167 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-04-17 23:02:45,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:45,170 INFO L225 Difference]: With dead ends: 1497 [2020-04-17 23:02:45,170 INFO L226 Difference]: Without dead ends: 1497 [2020-04-17 23:02:45,170 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:02:45,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2020-04-17 23:02:45,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1184. [2020-04-17 23:02:45,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2020-04-17 23:02:45,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 2707 transitions. [2020-04-17 23:02:45,192 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 2707 transitions. Word has length 45 [2020-04-17 23:02:45,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:45,192 INFO L479 AbstractCegarLoop]: Abstraction has 1184 states and 2707 transitions. [2020-04-17 23:02:45,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:45,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 2707 transitions. [2020-04-17 23:02:45,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-04-17 23:02:45,195 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:45,195 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2020-04-17 23:02:45,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:45,398 INFO L427 AbstractCegarLoop]: === Iteration 23 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:45,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:45,398 INFO L82 PathProgramCache]: Analyzing trace with hash 190021147, now seen corresponding path program 6 times [2020-04-17 23:02:45,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:45,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926458270] [2020-04-17 23:02:45,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:45,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926458270] [2020-04-17 23:02:45,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732480400] [2020-04-17 23:02:45,638 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:45,834 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 23:02:45,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:45,836 INFO L264 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:45,837 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:45,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:45,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 21 [2020-04-17 23:02:45,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883701349] [2020-04-17 23:02:45,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:02:45,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:45,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:02:45,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:02:45,858 INFO L87 Difference]: Start difference. First operand 1184 states and 2707 transitions. Second operand 22 states. [2020-04-17 23:02:46,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:46,131 INFO L93 Difference]: Finished difference Result 1672 states and 3672 transitions. [2020-04-17 23:02:46,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:02:46,132 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-04-17 23:02:46,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:46,135 INFO L225 Difference]: With dead ends: 1672 [2020-04-17 23:02:46,135 INFO L226 Difference]: Without dead ends: 1672 [2020-04-17 23:02:46,136 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=248, Invalid=682, Unknown=0, NotChecked=0, Total=930 [2020-04-17 23:02:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2020-04-17 23:02:46,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1261. [2020-04-17 23:02:46,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1261 states. [2020-04-17 23:02:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 2876 transitions. [2020-04-17 23:02:46,159 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 2876 transitions. Word has length 48 [2020-04-17 23:02:46,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:46,159 INFO L479 AbstractCegarLoop]: Abstraction has 1261 states and 2876 transitions. [2020-04-17 23:02:46,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:02:46,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 2876 transitions. [2020-04-17 23:02:46,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-04-17 23:02:46,162 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:46,163 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:46,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:46,369 INFO L427 AbstractCegarLoop]: === Iteration 24 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:46,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:46,369 INFO L82 PathProgramCache]: Analyzing trace with hash 6545759, now seen corresponding path program 5 times [2020-04-17 23:02:46,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:46,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321483613] [2020-04-17 23:02:46,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:47,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321483613] [2020-04-17 23:02:47,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357174219] [2020-04-17 23:02:47,461 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:47,560 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:02:47,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:47,563 INFO L264 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 102 conjunts are in the unsatisfiable core [2020-04-17 23:02:47,565 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:47,598 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:02:47,598 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 91 [2020-04-17 23:02:47,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:47,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:47,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:47,600 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-04-17 23:02:47,671 INFO L619 ElimStorePlain]: treesize reduction 208, result has 13.3 percent of original size [2020-04-17 23:02:47,672 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-17 23:02:47,672 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:8 [2020-04-17 23:02:47,868 INFO L377 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 17 treesize of output 13 [2020-04-17 23:02:47,868 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:02:47,877 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:02:47,878 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:02:47,878 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:26 [2020-04-17 23:02:48,179 INFO L343 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2020-04-17 23:02:48,179 INFO L377 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2020-04-17 23:02:48,180 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:02:48,191 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:02:48,191 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:02:48,191 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:27 [2020-04-17 23:02:48,488 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-04-17 23:02:48,489 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2020-04-17 23:02:48,489 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:02:48,503 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:02:48,504 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:02:48,504 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:27 [2020-04-17 23:02:48,637 INFO L377 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-04-17 23:02:48,637 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:02:48,647 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:02:48,647 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-04-17 23:02:48,648 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:33, output treesize:29 [2020-04-17 23:02:49,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:49,468 INFO L377 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2020-04-17 23:02:49,468 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:02:49,474 INFO L377 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2020-04-17 23:02:49,474 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 23:02:49,495 INFO L619 ElimStorePlain]: treesize reduction 28, result has 34.9 percent of original size [2020-04-17 23:02:49,495 INFO L539 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:02:49,496 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:92, output treesize:11 [2020-04-17 23:02:49,609 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:49,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:49,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25] total 55 [2020-04-17 23:02:49,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836668942] [2020-04-17 23:02:49,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-04-17 23:02:49,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:49,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-04-17 23:02:49,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=3034, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 23:02:49,611 INFO L87 Difference]: Start difference. First operand 1261 states and 2876 transitions. Second operand 57 states. [2020-04-17 23:02:50,323 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-04-17 23:02:50,587 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-04-17 23:02:51,252 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-04-17 23:02:51,424 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-04-17 23:02:52,013 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-04-17 23:02:53,099 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-04-17 23:02:54,680 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 58 [2020-04-17 23:02:54,915 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2020-04-17 23:02:57,072 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-04-17 23:02:57,741 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-04-17 23:02:58,509 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2020-04-17 23:02:59,855 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2020-04-17 23:03:01,856 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 60 [2020-04-17 23:03:03,772 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 63 [2020-04-17 23:03:06,224 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-04-17 23:03:06,811 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-04-17 23:03:07,628 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-04-17 23:03:14,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:14,649 INFO L93 Difference]: Finished difference Result 6729 states and 14207 transitions. [2020-04-17 23:03:14,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2020-04-17 23:03:14,650 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 51 [2020-04-17 23:03:14,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:14,660 INFO L225 Difference]: With dead ends: 6729 [2020-04-17 23:03:14,660 INFO L226 Difference]: Without dead ends: 6512 [2020-04-17 23:03:14,668 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14993 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=3087, Invalid=40803, Unknown=0, NotChecked=0, Total=43890 [2020-04-17 23:03:14,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6512 states. [2020-04-17 23:03:14,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6512 to 1868. [2020-04-17 23:03:14,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1868 states. [2020-04-17 23:03:14,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 4394 transitions. [2020-04-17 23:03:14,728 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 4394 transitions. Word has length 51 [2020-04-17 23:03:14,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:14,729 INFO L479 AbstractCegarLoop]: Abstraction has 1868 states and 4394 transitions. [2020-04-17 23:03:14,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-04-17 23:03:14,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 4394 transitions. [2020-04-17 23:03:14,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-17 23:03:14,732 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:14,732 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:14,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:14,936 INFO L427 AbstractCegarLoop]: === Iteration 25 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:14,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:14,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1277101899, now seen corresponding path program 8 times [2020-04-17 23:03:14,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:14,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643877897] [2020-04-17 23:03:14,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 74 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 23:03:15,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643877897] [2020-04-17 23:03:15,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955409024] [2020-04-17 23:03:15,079 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:15,200 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:15,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:15,201 INFO L264 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:03:15,202 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 23:03:15,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:15,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 17 [2020-04-17 23:03:15,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821012236] [2020-04-17 23:03:15,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:15,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:15,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:15,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:15,226 INFO L87 Difference]: Start difference. First operand 1868 states and 4394 transitions. Second operand 18 states. [2020-04-17 23:03:15,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:15,521 INFO L93 Difference]: Finished difference Result 2777 states and 6232 transitions. [2020-04-17 23:03:15,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:03:15,522 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-04-17 23:03:15,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:15,525 INFO L225 Difference]: With dead ends: 2777 [2020-04-17 23:03:15,525 INFO L226 Difference]: Without dead ends: 2777 [2020-04-17 23:03:15,525 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2020-04-17 23:03:15,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2020-04-17 23:03:15,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 1868. [2020-04-17 23:03:15,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1868 states. [2020-04-17 23:03:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 4394 transitions. [2020-04-17 23:03:15,558 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 4394 transitions. Word has length 52 [2020-04-17 23:03:15,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:15,558 INFO L479 AbstractCegarLoop]: Abstraction has 1868 states and 4394 transitions. [2020-04-17 23:03:15,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:15,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 4394 transitions. [2020-04-17 23:03:15,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-17 23:03:15,561 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:15,561 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:15,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:15,765 INFO L427 AbstractCegarLoop]: === Iteration 26 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:15,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:15,766 INFO L82 PathProgramCache]: Analyzing trace with hash 453512769, now seen corresponding path program 9 times [2020-04-17 23:03:15,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:15,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503778795] [2020-04-17 23:03:15,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 74 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 23:03:15,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503778795] [2020-04-17 23:03:15,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889928068] [2020-04-17 23:03:15,923 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:16,183 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 23:03:16,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:16,186 INFO L264 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:03:16,188 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 23:03:16,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:16,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 17 [2020-04-17 23:03:16,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96216151] [2020-04-17 23:03:16,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:16,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:16,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:16,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:16,232 INFO L87 Difference]: Start difference. First operand 1868 states and 4394 transitions. Second operand 18 states. [2020-04-17 23:03:16,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:16,536 INFO L93 Difference]: Finished difference Result 2999 states and 6703 transitions. [2020-04-17 23:03:16,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 23:03:16,538 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-04-17 23:03:16,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:16,541 INFO L225 Difference]: With dead ends: 2999 [2020-04-17 23:03:16,541 INFO L226 Difference]: Without dead ends: 2999 [2020-04-17 23:03:16,541 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2020-04-17 23:03:16,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2999 states. [2020-04-17 23:03:16,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2999 to 1942. [2020-04-17 23:03:16,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1942 states. [2020-04-17 23:03:16,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 4603 transitions. [2020-04-17 23:03:16,571 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 4603 transitions. Word has length 52 [2020-04-17 23:03:16,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:16,571 INFO L479 AbstractCegarLoop]: Abstraction has 1942 states and 4603 transitions. [2020-04-17 23:03:16,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:16,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 4603 transitions. [2020-04-17 23:03:16,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-17 23:03:16,573 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:16,574 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:16,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:16,775 INFO L427 AbstractCegarLoop]: === Iteration 27 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:16,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:16,775 INFO L82 PathProgramCache]: Analyzing trace with hash -237771979, now seen corresponding path program 10 times [2020-04-17 23:03:16,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:16,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158659899] [2020-04-17 23:03:16,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:16,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:16,954 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 74 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 23:03:16,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158659899] [2020-04-17 23:03:16,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745296698] [2020-04-17 23:03:16,955 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 23:03:17,081 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:17,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:17,083 INFO L264 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:03:17,085 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 23:03:17,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:17,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 17 [2020-04-17 23:03:17,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820170217] [2020-04-17 23:03:17,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:17,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:17,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:17,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:17,116 INFO L87 Difference]: Start difference. First operand 1942 states and 4603 transitions. Second operand 18 states. [2020-04-17 23:03:17,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:17,399 INFO L93 Difference]: Finished difference Result 2784 states and 6322 transitions. [2020-04-17 23:03:17,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:03:17,399 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-04-17 23:03:17,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:17,403 INFO L225 Difference]: With dead ends: 2784 [2020-04-17 23:03:17,403 INFO L226 Difference]: Without dead ends: 2784 [2020-04-17 23:03:17,403 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:03:17,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2020-04-17 23:03:17,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2030. [2020-04-17 23:03:17,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2030 states. [2020-04-17 23:03:17,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 4809 transitions. [2020-04-17 23:03:17,438 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 4809 transitions. Word has length 52 [2020-04-17 23:03:17,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:17,438 INFO L479 AbstractCegarLoop]: Abstraction has 2030 states and 4809 transitions. [2020-04-17 23:03:17,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:17,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 4809 transitions. [2020-04-17 23:03:17,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-17 23:03:17,442 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:17,442 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:17,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:17,646 INFO L427 AbstractCegarLoop]: === Iteration 28 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:17,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:17,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1819300801, now seen corresponding path program 11 times [2020-04-17 23:03:17,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:17,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304112342] [2020-04-17 23:03:17,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 23:03:17,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304112342] [2020-04-17 23:03:17,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299520143] [2020-04-17 23:03:17,812 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:17,967 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 23:03:17,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:17,969 INFO L264 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:03:17,970 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 23:03:17,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:17,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 17 [2020-04-17 23:03:17,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882280113] [2020-04-17 23:03:17,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:17,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:17,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:17,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:17,976 INFO L87 Difference]: Start difference. First operand 2030 states and 4809 transitions. Second operand 18 states. [2020-04-17 23:03:18,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:18,242 INFO L93 Difference]: Finished difference Result 2605 states and 5958 transitions. [2020-04-17 23:03:18,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:03:18,242 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-04-17 23:03:18,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:18,245 INFO L225 Difference]: With dead ends: 2605 [2020-04-17 23:03:18,246 INFO L226 Difference]: Without dead ends: 2605 [2020-04-17 23:03:18,246 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:03:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2020-04-17 23:03:18,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 2090. [2020-04-17 23:03:18,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2090 states. [2020-04-17 23:03:18,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 4953 transitions. [2020-04-17 23:03:18,268 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 4953 transitions. Word has length 52 [2020-04-17 23:03:18,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:18,268 INFO L479 AbstractCegarLoop]: Abstraction has 2090 states and 4953 transitions. [2020-04-17 23:03:18,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:18,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 4953 transitions. [2020-04-17 23:03:18,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-04-17 23:03:18,271 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:18,271 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2020-04-17 23:03:18,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:18,475 INFO L427 AbstractCegarLoop]: === Iteration 29 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:18,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:18,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1876039885, now seen corresponding path program 7 times [2020-04-17 23:03:18,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:18,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485258635] [2020-04-17 23:03:18,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:18,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485258635] [2020-04-17 23:03:18,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966846281] [2020-04-17 23:03:18,710 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:18,812 INFO L264 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:18,818 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:18,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:18,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16] total 24 [2020-04-17 23:03:18,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160368928] [2020-04-17 23:03:18,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 23:03:18,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:18,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 23:03:18,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:03:18,850 INFO L87 Difference]: Start difference. First operand 2090 states and 4953 transitions. Second operand 25 states. [2020-04-17 23:03:19,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:19,194 INFO L93 Difference]: Finished difference Result 2707 states and 6165 transitions. [2020-04-17 23:03:19,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:03:19,195 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-04-17 23:03:19,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:19,197 INFO L225 Difference]: With dead ends: 2707 [2020-04-17 23:03:19,197 INFO L226 Difference]: Without dead ends: 2707 [2020-04-17 23:03:19,198 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=879, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 23:03:19,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2707 states. [2020-04-17 23:03:19,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2707 to 2167. [2020-04-17 23:03:19,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2167 states. [2020-04-17 23:03:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 5122 transitions. [2020-04-17 23:03:19,221 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 5122 transitions. Word has length 55 [2020-04-17 23:03:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:19,222 INFO L479 AbstractCegarLoop]: Abstraction has 2167 states and 5122 transitions. [2020-04-17 23:03:19,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 23:03:19,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 5122 transitions. [2020-04-17 23:03:19,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-04-17 23:03:19,225 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:19,225 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:19,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:19,429 INFO L427 AbstractCegarLoop]: === Iteration 30 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:19,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:19,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1158660423, now seen corresponding path program 6 times [2020-04-17 23:03:19,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:19,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325001972] [2020-04-17 23:03:19,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:21,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325001972] [2020-04-17 23:03:21,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699731782] [2020-04-17 23:03:21,088 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:21,241 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 23:03:21,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:21,243 INFO L264 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 92 conjunts are in the unsatisfiable core [2020-04-17 23:03:21,245 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:21,259 INFO L377 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 87 treesize of output 83 [2020-04-17 23:03:21,260 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:03:21,304 INFO L619 ElimStorePlain]: treesize reduction 56, result has 32.5 percent of original size [2020-04-17 23:03:21,304 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-17 23:03:21,305 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:30, output treesize:11 [2020-04-17 23:03:21,624 INFO L377 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 17 treesize of output 13 [2020-04-17 23:03:21,624 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:03:21,633 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:03:21,634 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:03:21,635 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:29 [2020-04-17 23:03:22,003 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-04-17 23:03:22,004 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2020-04-17 23:03:22,004 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:03:22,023 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:03:22,024 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:03:22,024 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:51, output treesize:30 [2020-04-17 23:03:22,367 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-04-17 23:03:22,368 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2020-04-17 23:03:22,368 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:03:22,384 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:03:22,385 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:03:22,385 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:51, output treesize:30 [2020-04-17 23:03:22,537 INFO L377 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-04-17 23:03:22,538 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:03:22,556 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:03:22,557 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-04-17 23:03:22,557 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:34 [2020-04-17 23:03:23,464 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:23,471 INFO L377 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2020-04-17 23:03:23,472 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:03:23,478 INFO L377 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2020-04-17 23:03:23,478 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 23:03:23,497 INFO L619 ElimStorePlain]: treesize reduction 28, result has 34.9 percent of original size [2020-04-17 23:03:23,497 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:03:23,498 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:92, output treesize:11 [2020-04-17 23:03:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:03:23,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:23,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 57 [2020-04-17 23:03:23,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875037458] [2020-04-17 23:03:23,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-04-17 23:03:23,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:23,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-04-17 23:03:23,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3258, Unknown=0, NotChecked=0, Total=3422 [2020-04-17 23:03:23,642 INFO L87 Difference]: Start difference. First operand 2167 states and 5122 transitions. Second operand 59 states. [2020-04-17 23:03:24,609 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-04-17 23:03:26,489 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2020-04-17 23:03:26,867 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 54 [2020-04-17 23:03:29,061 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2020-04-17 23:03:29,251 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2020-04-17 23:03:29,535 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 50 [2020-04-17 23:03:29,749 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2020-04-17 23:03:30,331 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2020-04-17 23:03:30,636 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-04-17 23:03:31,364 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2020-04-17 23:03:31,643 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-04-17 23:03:32,200 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-04-17 23:03:32,813 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2020-04-17 23:03:33,248 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 45 [2020-04-17 23:03:33,564 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2020-04-17 23:03:33,942 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2020-04-17 23:03:34,156 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 51 [2020-04-17 23:03:34,561 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2020-04-17 23:03:34,807 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2020-04-17 23:03:35,588 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 56 [2020-04-17 23:03:35,884 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-04-17 23:03:36,162 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2020-04-17 23:03:36,426 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-04-17 23:03:36,748 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-04-17 23:03:37,048 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 65 [2020-04-17 23:03:37,278 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-04-17 23:03:37,492 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2020-04-17 23:03:38,035 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-04-17 23:03:38,310 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2020-04-17 23:03:38,573 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-04-17 23:03:39,261 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2020-04-17 23:03:39,553 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 56 [2020-04-17 23:03:40,032 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-04-17 23:03:40,293 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-04-17 23:03:40,767 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 58 [2020-04-17 23:03:40,989 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-04-17 23:03:41,482 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-04-17 23:03:41,726 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2020-04-17 23:03:42,772 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2020-04-17 23:03:43,077 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-04-17 23:03:43,443 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-04-17 23:03:43,917 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-04-17 23:03:44,160 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2020-04-17 23:03:44,409 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2020-04-17 23:03:44,605 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-04-17 23:03:44,925 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2020-04-17 23:03:45,334 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-04-17 23:03:45,685 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-04-17 23:03:45,942 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2020-04-17 23:03:46,491 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 65 [2020-04-17 23:03:46,771 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 58 [2020-04-17 23:03:47,274 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2020-04-17 23:03:47,884 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 65 [2020-04-17 23:03:48,746 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-04-17 23:03:48,984 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-04-17 23:03:49,331 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2020-04-17 23:03:49,552 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2020-04-17 23:03:50,635 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-04-17 23:03:50,962 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 62 [2020-04-17 23:03:51,236 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2020-04-17 23:03:51,490 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 58 [2020-04-17 23:03:52,300 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2020-04-17 23:03:52,621 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 62 [2020-04-17 23:03:53,528 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 63 [2020-04-17 23:03:53,884 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 64 [2020-04-17 23:03:54,602 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2020-04-17 23:03:55,274 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-04-17 23:03:56,294 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 68 [2020-04-17 23:03:56,897 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 71 [2020-04-17 23:03:57,532 WARN L192 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2020-04-17 23:03:57,743 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2020-04-17 23:03:58,167 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2020-04-17 23:03:58,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:58,719 INFO L93 Difference]: Finished difference Result 7103 states and 15390 transitions. [2020-04-17 23:03:58,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2020-04-17 23:03:58,720 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2020-04-17 23:03:58,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:58,727 INFO L225 Difference]: With dead ends: 7103 [2020-04-17 23:03:58,727 INFO L226 Difference]: Without dead ends: 7103 [2020-04-17 23:03:58,733 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15120 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=3313, Invalid=41843, Unknown=0, NotChecked=0, Total=45156 [2020-04-17 23:03:58,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7103 states. [2020-04-17 23:03:58,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7103 to 2716. [2020-04-17 23:03:58,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2716 states. [2020-04-17 23:03:58,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 6554 transitions. [2020-04-17 23:03:58,842 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 6554 transitions. Word has length 58 [2020-04-17 23:03:58,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:58,843 INFO L479 AbstractCegarLoop]: Abstraction has 2716 states and 6554 transitions. [2020-04-17 23:03:58,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-04-17 23:03:58,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 6554 transitions. [2020-04-17 23:03:58,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-04-17 23:03:58,850 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:58,850 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:59,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:59,055 INFO L427 AbstractCegarLoop]: === Iteration 31 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:59,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:59,056 INFO L82 PathProgramCache]: Analyzing trace with hash 78714317, now seen corresponding path program 12 times [2020-04-17 23:03:59,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:59,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696298067] [2020-04-17 23:03:59,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 111 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 23:03:59,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696298067] [2020-04-17 23:03:59,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942572545] [2020-04-17 23:03:59,286 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:59,533 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 23:03:59,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:59,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:59,538 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 23:03:59,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:59,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 20 [2020-04-17 23:03:59,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365962998] [2020-04-17 23:03:59,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:03:59,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:59,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:03:59,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:03:59,573 INFO L87 Difference]: Start difference. First operand 2716 states and 6554 transitions. Second operand 21 states. [2020-04-17 23:03:59,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:59,914 INFO L93 Difference]: Finished difference Result 3739 states and 8625 transitions. [2020-04-17 23:03:59,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:03:59,914 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-04-17 23:03:59,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:59,918 INFO L225 Difference]: With dead ends: 3739 [2020-04-17 23:03:59,918 INFO L226 Difference]: Without dead ends: 3739 [2020-04-17 23:03:59,919 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 23:03:59,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2020-04-17 23:03:59,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 2718. [2020-04-17 23:03:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2718 states. [2020-04-17 23:03:59,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 6561 transitions. [2020-04-17 23:03:59,967 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 6561 transitions. Word has length 59 [2020-04-17 23:03:59,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:59,968 INFO L479 AbstractCegarLoop]: Abstraction has 2718 states and 6561 transitions. [2020-04-17 23:03:59,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:03:59,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 6561 transitions. [2020-04-17 23:03:59,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-04-17 23:03:59,973 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:59,973 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:00,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:00,179 INFO L427 AbstractCegarLoop]: === Iteration 32 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:00,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:00,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1809328985, now seen corresponding path program 13 times [2020-04-17 23:04:00,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:00,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132653225] [2020-04-17 23:04:00,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 111 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 23:04:00,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132653225] [2020-04-17 23:04:00,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954247884] [2020-04-17 23:04:00,352 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:00,468 INFO L264 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:04:00,469 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 23:04:00,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:00,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 20 [2020-04-17 23:04:00,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817121721] [2020-04-17 23:04:00,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:00,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:00,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:00,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:00,496 INFO L87 Difference]: Start difference. First operand 2718 states and 6561 transitions. Second operand 21 states. [2020-04-17 23:04:00,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:00,829 INFO L93 Difference]: Finished difference Result 3905 states and 9029 transitions. [2020-04-17 23:04:00,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 23:04:00,830 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-04-17 23:04:00,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:00,834 INFO L225 Difference]: With dead ends: 3905 [2020-04-17 23:04:00,834 INFO L226 Difference]: Without dead ends: 3905 [2020-04-17 23:04:00,834 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=825, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 23:04:00,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3905 states. [2020-04-17 23:04:00,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3905 to 2716. [2020-04-17 23:04:00,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2716 states. [2020-04-17 23:04:00,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 6556 transitions. [2020-04-17 23:04:00,865 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 6556 transitions. Word has length 59 [2020-04-17 23:04:00,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:00,866 INFO L479 AbstractCegarLoop]: Abstraction has 2716 states and 6556 transitions. [2020-04-17 23:04:00,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:00,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 6556 transitions. [2020-04-17 23:04:00,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-04-17 23:04:00,871 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:00,871 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:01,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:01,074 INFO L427 AbstractCegarLoop]: === Iteration 33 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:01,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:01,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1118044237, now seen corresponding path program 14 times [2020-04-17 23:04:01,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:01,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116581629] [2020-04-17 23:04:01,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 111 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 23:04:01,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116581629] [2020-04-17 23:04:01,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841835491] [2020-04-17 23:04:01,326 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:01,445 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:01,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:01,447 INFO L264 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:04:01,449 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 23:04:01,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:01,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 20 [2020-04-17 23:04:01,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097403907] [2020-04-17 23:04:01,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:01,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:01,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:01,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:01,472 INFO L87 Difference]: Start difference. First operand 2716 states and 6556 transitions. Second operand 21 states. [2020-04-17 23:04:01,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:01,817 INFO L93 Difference]: Finished difference Result 4075 states and 9385 transitions. [2020-04-17 23:04:01,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:04:01,817 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-04-17 23:04:01,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:01,821 INFO L225 Difference]: With dead ends: 4075 [2020-04-17 23:04:01,821 INFO L226 Difference]: Without dead ends: 4075 [2020-04-17 23:04:01,822 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=768, Unknown=0, NotChecked=0, Total=992 [2020-04-17 23:04:01,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4075 states. [2020-04-17 23:04:01,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4075 to 2836. [2020-04-17 23:04:01,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2836 states. [2020-04-17 23:04:01,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 6894 transitions. [2020-04-17 23:04:01,855 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 6894 transitions. Word has length 59 [2020-04-17 23:04:01,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:01,855 INFO L479 AbstractCegarLoop]: Abstraction has 2836 states and 6894 transitions. [2020-04-17 23:04:01,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:01,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 6894 transitions. [2020-04-17 23:04:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-04-17 23:04:01,860 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:01,860 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:02,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:02,061 INFO L427 AbstractCegarLoop]: === Iteration 34 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:02,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:02,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1119850279, now seen corresponding path program 15 times [2020-04-17 23:04:02,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:02,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751143903] [2020-04-17 23:04:02,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 111 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 23:04:02,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751143903] [2020-04-17 23:04:02,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542780543] [2020-04-17 23:04:02,256 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:02,443 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 23:04:02,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:02,445 INFO L264 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:04:02,447 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 23:04:02,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:02,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 20 [2020-04-17 23:04:02,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624138626] [2020-04-17 23:04:02,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:02,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:02,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:02,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:02,470 INFO L87 Difference]: Start difference. First operand 2836 states and 6894 transitions. Second operand 21 states. [2020-04-17 23:04:02,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:02,773 INFO L93 Difference]: Finished difference Result 3805 states and 8879 transitions. [2020-04-17 23:04:02,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:04:02,774 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-04-17 23:04:02,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:02,778 INFO L225 Difference]: With dead ends: 3805 [2020-04-17 23:04:02,778 INFO L226 Difference]: Without dead ends: 3805 [2020-04-17 23:04:02,778 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2020-04-17 23:04:02,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2020-04-17 23:04:02,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 2888. [2020-04-17 23:04:02,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2888 states. [2020-04-17 23:04:02,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2888 states to 2888 states and 7054 transitions. [2020-04-17 23:04:02,808 INFO L78 Accepts]: Start accepts. Automaton has 2888 states and 7054 transitions. Word has length 59 [2020-04-17 23:04:02,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:02,809 INFO L479 AbstractCegarLoop]: Abstraction has 2888 states and 7054 transitions. [2020-04-17 23:04:02,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:02,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2888 states and 7054 transitions. [2020-04-17 23:04:02,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-04-17 23:04:02,812 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:02,812 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:03,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:03,014 INFO L427 AbstractCegarLoop]: === Iteration 35 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:03,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:03,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1377137971, now seen corresponding path program 16 times [2020-04-17 23:04:03,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:03,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075077792] [2020-04-17 23:04:03,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:03,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 116 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 23:04:03,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075077792] [2020-04-17 23:04:03,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995044255] [2020-04-17 23:04:03,265 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 23:04:03,420 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:04:03,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:03,423 INFO L264 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:04:03,426 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 23:04:03,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:03,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 20 [2020-04-17 23:04:03,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484912277] [2020-04-17 23:04:03,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:03,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:03,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:03,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:03,441 INFO L87 Difference]: Start difference. First operand 2888 states and 7054 transitions. Second operand 21 states. [2020-04-17 23:04:03,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:03,773 INFO L93 Difference]: Finished difference Result 3637 states and 8525 transitions. [2020-04-17 23:04:03,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:04:03,774 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-04-17 23:04:03,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:03,778 INFO L225 Difference]: With dead ends: 3637 [2020-04-17 23:04:03,779 INFO L226 Difference]: Without dead ends: 3637 [2020-04-17 23:04:03,779 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2020-04-17 23:04:03,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3637 states. [2020-04-17 23:04:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3637 to 2934. [2020-04-17 23:04:03,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2934 states. [2020-04-17 23:04:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 7161 transitions. [2020-04-17 23:04:03,830 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 7161 transitions. Word has length 59 [2020-04-17 23:04:03,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:03,831 INFO L479 AbstractCegarLoop]: Abstraction has 2934 states and 7161 transitions. [2020-04-17 23:04:03,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:03,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 7161 transitions. [2020-04-17 23:04:03,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-04-17 23:04:03,838 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:03,839 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:04,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:04,051 INFO L427 AbstractCegarLoop]: === Iteration 36 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:04,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:04,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1041002708, now seen corresponding path program 7 times [2020-04-17 23:04:04,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:04,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334930285] [2020-04-17 23:04:04,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:04,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334930285] [2020-04-17 23:04:04,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741724890] [2020-04-17 23:04:04,213 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:04,347 INFO L264 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:04:04,349 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:04,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:04,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 17 [2020-04-17 23:04:04,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250408632] [2020-04-17 23:04:04,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:04:04,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:04,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:04:04,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:04:04,384 INFO L87 Difference]: Start difference. First operand 2934 states and 7161 transitions. Second operand 18 states. [2020-04-17 23:04:04,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:04,688 INFO L93 Difference]: Finished difference Result 4189 states and 9735 transitions. [2020-04-17 23:04:04,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:04:04,688 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-04-17 23:04:04,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:04,694 INFO L225 Difference]: With dead ends: 4189 [2020-04-17 23:04:04,694 INFO L226 Difference]: Without dead ends: 4053 [2020-04-17 23:04:04,695 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2020-04-17 23:04:04,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2020-04-17 23:04:04,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 3008. [2020-04-17 23:04:04,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3008 states. [2020-04-17 23:04:04,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 7157 transitions. [2020-04-17 23:04:04,796 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 7157 transitions. Word has length 59 [2020-04-17 23:04:04,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:04,796 INFO L479 AbstractCegarLoop]: Abstraction has 3008 states and 7157 transitions. [2020-04-17 23:04:04,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:04:04,796 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 7157 transitions. [2020-04-17 23:04:04,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-04-17 23:04:04,801 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:04,801 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2020-04-17 23:04:05,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:05,005 INFO L427 AbstractCegarLoop]: === Iteration 37 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:05,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:05,006 INFO L82 PathProgramCache]: Analyzing trace with hash -627600613, now seen corresponding path program 8 times [2020-04-17 23:04:05,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:05,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027676102] [2020-04-17 23:04:05,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 8 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:05,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027676102] [2020-04-17 23:04:05,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801443110] [2020-04-17 23:04:05,351 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:05,509 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:05,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:05,512 INFO L264 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:04:05,515 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 8 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:05,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:05,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18] total 27 [2020-04-17 23:04:05,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959913677] [2020-04-17 23:04:05,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-04-17 23:04:05,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:05,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-17 23:04:05,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2020-04-17 23:04:05,556 INFO L87 Difference]: Start difference. First operand 3008 states and 7157 transitions. Second operand 28 states. [2020-04-17 23:04:05,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:05,940 INFO L93 Difference]: Finished difference Result 3800 states and 8706 transitions. [2020-04-17 23:04:05,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 23:04:05,941 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-04-17 23:04:05,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:05,946 INFO L225 Difference]: With dead ends: 3800 [2020-04-17 23:04:05,946 INFO L226 Difference]: Without dead ends: 3800 [2020-04-17 23:04:05,947 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 23:04:05,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3800 states. [2020-04-17 23:04:05,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3800 to 3089. [2020-04-17 23:04:05,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3089 states. [2020-04-17 23:04:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3089 states to 3089 states and 7340 transitions. [2020-04-17 23:04:05,985 INFO L78 Accepts]: Start accepts. Automaton has 3089 states and 7340 transitions. Word has length 62 [2020-04-17 23:04:05,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:05,985 INFO L479 AbstractCegarLoop]: Abstraction has 3089 states and 7340 transitions. [2020-04-17 23:04:05,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-04-17 23:04:05,985 INFO L276 IsEmpty]: Start isEmpty. Operand 3089 states and 7340 transitions. [2020-04-17 23:04:05,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-04-17 23:04:05,989 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:05,989 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:06,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:06,189 INFO L427 AbstractCegarLoop]: === Iteration 38 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:06,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:06,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1762823605, now seen corresponding path program 17 times [2020-04-17 23:04:06,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:06,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693320483] [2020-04-17 23:04:06,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 23:04:06,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693320483] [2020-04-17 23:04:06,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369151888] [2020-04-17 23:04:06,384 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:06,535 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 23:04:06,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:06,537 INFO L264 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:04:06,541 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 154 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 23:04:06,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:06,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 23 [2020-04-17 23:04:06,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91426821] [2020-04-17 23:04:06,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:04:06,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:06,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:04:06,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:04:06,584 INFO L87 Difference]: Start difference. First operand 3089 states and 7340 transitions. Second operand 24 states. [2020-04-17 23:04:07,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:07,118 INFO L93 Difference]: Finished difference Result 4469 states and 10103 transitions. [2020-04-17 23:04:07,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 23:04:07,119 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 66 [2020-04-17 23:04:07,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:07,126 INFO L225 Difference]: With dead ends: 4469 [2020-04-17 23:04:07,127 INFO L226 Difference]: Without dead ends: 4469 [2020-04-17 23:04:07,127 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 23:04:07,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2020-04-17 23:04:07,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 3089. [2020-04-17 23:04:07,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3089 states. [2020-04-17 23:04:07,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3089 states to 3089 states and 7340 transitions. [2020-04-17 23:04:07,199 INFO L78 Accepts]: Start accepts. Automaton has 3089 states and 7340 transitions. Word has length 66 [2020-04-17 23:04:07,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:07,199 INFO L479 AbstractCegarLoop]: Abstraction has 3089 states and 7340 transitions. [2020-04-17 23:04:07,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:04:07,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3089 states and 7340 transitions. [2020-04-17 23:04:07,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-04-17 23:04:07,207 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:07,208 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:07,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:07,422 INFO L427 AbstractCegarLoop]: === Iteration 39 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:07,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:07,422 INFO L82 PathProgramCache]: Analyzing trace with hash -801529023, now seen corresponding path program 18 times [2020-04-17 23:04:07,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:07,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545054866] [2020-04-17 23:04:07,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 23:04:07,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545054866] [2020-04-17 23:04:07,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185786280] [2020-04-17 23:04:07,785 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:08,131 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 23:04:08,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:08,134 INFO L264 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:04:08,136 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:08,169 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 154 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 23:04:08,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:08,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 23 [2020-04-17 23:04:08,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165171707] [2020-04-17 23:04:08,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:04:08,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:08,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:04:08,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:04:08,171 INFO L87 Difference]: Start difference. First operand 3089 states and 7340 transitions. Second operand 24 states. [2020-04-17 23:04:08,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:08,569 INFO L93 Difference]: Finished difference Result 4730 states and 10698 transitions. [2020-04-17 23:04:08,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 23:04:08,569 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 66 [2020-04-17 23:04:08,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:08,575 INFO L225 Difference]: With dead ends: 4730 [2020-04-17 23:04:08,575 INFO L226 Difference]: Without dead ends: 4730 [2020-04-17 23:04:08,577 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=1106, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 23:04:08,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4730 states. [2020-04-17 23:04:08,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4730 to 3091. [2020-04-17 23:04:08,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3091 states. [2020-04-17 23:04:08,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 7347 transitions. [2020-04-17 23:04:08,618 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 7347 transitions. Word has length 66 [2020-04-17 23:04:08,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:08,619 INFO L479 AbstractCegarLoop]: Abstraction has 3091 states and 7347 transitions. [2020-04-17 23:04:08,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:04:08,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 7347 transitions. [2020-04-17 23:04:08,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-04-17 23:04:08,623 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:08,623 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:08,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:08,824 INFO L427 AbstractCegarLoop]: === Iteration 40 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:08,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:08,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1492813771, now seen corresponding path program 19 times [2020-04-17 23:04:08,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:08,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97728772] [2020-04-17 23:04:08,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 23:04:09,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97728772] [2020-04-17 23:04:09,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814441246] [2020-04-17 23:04:09,048 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:09,154 INFO L264 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:04:09,156 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 154 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-17 23:04:09,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:09,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 23 [2020-04-17 23:04:09,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889888728] [2020-04-17 23:04:09,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:04:09,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:09,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:04:09,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:04:09,181 INFO L87 Difference]: Start difference. First operand 3091 states and 7347 transitions. Second operand 24 states. [2020-04-17 23:04:09,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:09,561 INFO L93 Difference]: Finished difference Result 4861 states and 11001 transitions. [2020-04-17 23:04:09,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 23:04:09,562 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 66 [2020-04-17 23:04:09,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:09,566 INFO L225 Difference]: With dead ends: 4861 [2020-04-17 23:04:09,566 INFO L226 Difference]: Without dead ends: 4861 [2020-04-17 23:04:09,567 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=1040, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 23:04:09,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2020-04-17 23:04:09,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 3205. [2020-04-17 23:04:09,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3205 states. [2020-04-17 23:04:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3205 states to 3205 states and 7666 transitions. [2020-04-17 23:04:09,614 INFO L78 Accepts]: Start accepts. Automaton has 3205 states and 7666 transitions. Word has length 66 [2020-04-17 23:04:09,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:09,614 INFO L479 AbstractCegarLoop]: Abstraction has 3205 states and 7666 transitions. [2020-04-17 23:04:09,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:04:09,614 INFO L276 IsEmpty]: Start isEmpty. Operand 3205 states and 7666 transitions. [2020-04-17 23:04:09,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-04-17 23:04:09,618 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:09,618 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:09,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:09,819 INFO L427 AbstractCegarLoop]: === Iteration 41 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:09,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:09,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1236058300, now seen corresponding path program 8 times [2020-04-17 23:04:09,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:09,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055554065] [2020-04-17 23:04:09,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 30 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:11,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055554065] [2020-04-17 23:04:11,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662362801] [2020-04-17 23:04:11,882 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:11,991 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:11,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:11,993 INFO L264 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 91 conjunts are in the unsatisfiable core [2020-04-17 23:04:11,995 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:12,001 INFO L377 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 577 treesize of output 573 [2020-04-17 23:04:12,002 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:04:12,077 INFO L619 ElimStorePlain]: treesize reduction 536, result has 4.3 percent of original size [2020-04-17 23:04:12,078 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-17 23:04:12,078 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:27, output treesize:8 [2020-04-17 23:04:12,270 INFO L377 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 17 treesize of output 13 [2020-04-17 23:04:12,271 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:04:12,289 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:04:12,290 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:04:12,290 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:26 [2020-04-17 23:04:12,628 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-04-17 23:04:12,629 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2020-04-17 23:04:12,630 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:04:12,646 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:04:12,647 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:04:12,647 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:27 [2020-04-17 23:04:12,921 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-04-17 23:04:12,922 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2020-04-17 23:04:12,922 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:04:12,938 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:04:12,939 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:04:12,939 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:27 [2020-04-17 23:04:13,239 INFO L189 IndexEqualityManager]: detected not equals via solver [2020-04-17 23:04:13,240 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2020-04-17 23:04:13,240 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:04:13,257 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:04:13,258 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:04:13,258 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:27 [2020-04-17 23:04:33,767 INFO L377 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2020-04-17 23:04:33,767 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:04:33,781 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:04:33,781 INFO L539 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-04-17 23:04:33,782 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:43, output treesize:39 [2020-04-17 23:04:34,972 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:34,978 INFO L172 IndexEqualityManager]: detected equality via solver [2020-04-17 23:04:34,982 INFO L172 IndexEqualityManager]: detected equality via solver [2020-04-17 23:04:34,983 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 22 [2020-04-17 23:04:34,983 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 23:04:34,992 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 23:04:34,992 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2020-04-17 23:04:34,992 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:34,993 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:34,994 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:04:35,042 INFO L619 ElimStorePlain]: treesize reduction 55, result has 37.5 percent of original size [2020-04-17 23:04:35,043 INFO L539 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 23:04:35,044 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:144, output treesize:11 [2020-04-17 23:04:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 33 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:04:35,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:35,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 32] total 72 [2020-04-17 23:04:35,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891917032] [2020-04-17 23:04:35,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-04-17 23:04:35,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:35,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-04-17 23:04:35,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=4946, Unknown=10, NotChecked=0, Total=5402 [2020-04-17 23:04:35,186 INFO L87 Difference]: Start difference. First operand 3205 states and 7666 transitions. Second operand 74 states. [2020-04-17 23:04:36,300 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-04-17 23:04:36,812 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-04-17 23:04:37,171 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2020-04-17 23:04:37,539 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-04-17 23:04:38,101 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2020-04-17 23:05:30,425 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2020-04-17 23:05:34,833 WARN L192 SmtUtils]: Spent 4.28 s on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-04-17 23:05:54,292 WARN L192 SmtUtils]: Spent 4.69 s on a formula simplification. DAG size of input: 101 DAG size of output: 67 [2020-04-17 23:06:00,616 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 68 [2020-04-17 23:06:05,169 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown