/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 19:11:00,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 19:11:00,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 19:11:00,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 19:11:00,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 19:11:00,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 19:11:00,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 19:11:00,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 19:11:00,740 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 19:11:00,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 19:11:00,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 19:11:00,743 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 19:11:00,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 19:11:00,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 19:11:00,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 19:11:00,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 19:11:00,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 19:11:00,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 19:11:00,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 19:11:00,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 19:11:00,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 19:11:00,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 19:11:00,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 19:11:00,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 19:11:00,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 19:11:00,760 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 19:11:00,761 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 19:11:00,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 19:11:00,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 19:11:00,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 19:11:00,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 19:11:00,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 19:11:00,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 19:11:00,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 19:11:00,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 19:11:00,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 19:11:00,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 19:11:00,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 19:11:00,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 19:11:00,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 19:11:00,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 19:11:00,771 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-15 19:11:00,795 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 19:11:00,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 19:11:00,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 19:11:00,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 19:11:00,797 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 19:11:00,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 19:11:00,797 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 19:11:00,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 19:11:00,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 19:11:00,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 19:11:00,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 19:11:00,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 19:11:00,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 19:11:00,798 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 19:11:00,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 19:11:00,799 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 19:11:00,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 19:11:00,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 19:11:00,799 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 19:11:00,799 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 19:11:00,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 19:11:00,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 19:11:00,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 19:11:00,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 19:11:00,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 19:11:00,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 19:11:00,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 19:11:00,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 19:11:00,801 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 19:11:00,801 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 19:11:01,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 19:11:01,093 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 19:11:01,097 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 19:11:01,098 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 19:11:01,098 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 19:11:01,099 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-10-15 19:11:01,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7653cd7d0/4b44f34fa84e4d838f44cf6813ccc109/FLAG34965b0ca [2020-10-15 19:11:01,802 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 19:11:01,803 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-10-15 19:11:01,826 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7653cd7d0/4b44f34fa84e4d838f44cf6813ccc109/FLAG34965b0ca [2020-10-15 19:11:02,073 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7653cd7d0/4b44f34fa84e4d838f44cf6813ccc109 [2020-10-15 19:11:02,081 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 19:11:02,083 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 19:11:02,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 19:11:02,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 19:11:02,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 19:11:02,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:11:02" (1/1) ... [2020-10-15 19:11:02,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cada887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:02, skipping insertion in model container [2020-10-15 19:11:02,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:11:02" (1/1) ... [2020-10-15 19:11:02,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 19:11:02,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 19:11:02,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 19:11:02,810 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 19:11:02,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 19:11:03,179 INFO L208 MainTranslator]: Completed translation [2020-10-15 19:11:03,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:03 WrapperNode [2020-10-15 19:11:03,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 19:11:03,181 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 19:11:03,182 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 19:11:03,182 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 19:11:03,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:03" (1/1) ... [2020-10-15 19:11:03,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:03" (1/1) ... [2020-10-15 19:11:03,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 19:11:03,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 19:11:03,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 19:11:03,289 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 19:11:03,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:03" (1/1) ... [2020-10-15 19:11:03,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:03" (1/1) ... [2020-10-15 19:11:03,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:03" (1/1) ... [2020-10-15 19:11:03,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:03" (1/1) ... [2020-10-15 19:11:03,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:03" (1/1) ... [2020-10-15 19:11:03,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:03" (1/1) ... [2020-10-15 19:11:03,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:03" (1/1) ... [2020-10-15 19:11:03,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 19:11:03,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 19:11:03,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 19:11:03,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 19:11:03,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 19:11:03,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 19:11:03,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 19:11:03,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-15 19:11:03,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 19:11:03,422 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-10-15 19:11:03,422 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-10-15 19:11:03,423 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-10-15 19:11:03,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-15 19:11:03,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 19:11:03,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 19:11:03,425 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 19:11:03,794 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 19:11:03,794 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-15 19:11:03,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:11:03 BoogieIcfgContainer [2020-10-15 19:11:03,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 19:11:03,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 19:11:03,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 19:11:03,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 19:11:03,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:11:02" (1/3) ... [2020-10-15 19:11:03,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb18648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:11:03, skipping insertion in model container [2020-10-15 19:11:03,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:03" (2/3) ... [2020-10-15 19:11:03,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb18648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:11:03, skipping insertion in model container [2020-10-15 19:11:03,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:11:03" (3/3) ... [2020-10-15 19:11:03,806 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-10-15 19:11:03,819 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 19:11:03,819 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 19:11:03,827 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 19:11:03,828 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 19:11:03,855 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,855 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,856 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,856 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,856 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,857 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,857 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,857 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,857 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,858 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,858 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,858 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,859 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,859 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,859 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,859 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,860 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,860 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,860 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,860 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,861 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,861 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,861 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,865 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,865 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,866 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,866 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,866 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,866 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,867 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,867 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,867 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:03,891 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-15 19:11:03,910 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 19:11:03,911 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 19:11:03,911 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 19:11:03,911 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 19:11:03,911 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 19:11:03,911 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 19:11:03,911 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 19:11:03,912 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 19:11:03,926 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 19:11:03,929 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 81 transitions, 170 flow [2020-10-15 19:11:03,932 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 81 transitions, 170 flow [2020-10-15 19:11:03,934 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-10-15 19:11:03,985 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-10-15 19:11:03,985 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-15 19:11:03,994 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-10-15 19:11:04,000 INFO L117 LiptonReduction]: Number of co-enabled transitions 646 [2020-10-15 19:11:05,839 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-10-15 19:11:06,009 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-15 19:11:06,599 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-10-15 19:11:06,888 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-15 19:11:06,898 INFO L132 LiptonReduction]: Checked pairs total: 823 [2020-10-15 19:11:06,898 INFO L134 LiptonReduction]: Total number of compositions: 75 [2020-10-15 19:11:06,905 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 17 transitions, 42 flow [2020-10-15 19:11:06,914 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2020-10-15 19:11:06,916 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-15 19:11:06,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 19:11:06,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:06,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:06,925 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:06,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:06,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1717538151, now seen corresponding path program 1 times [2020-10-15 19:11:06,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:06,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066540499] [2020-10-15 19:11:06,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:11:07,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066540499] [2020-10-15 19:11:07,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:11:07,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 19:11:07,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349409579] [2020-10-15 19:11:07,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 19:11:07,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:07,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 19:11:07,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 19:11:07,152 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-15 19:11:07,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:07,194 INFO L93 Difference]: Finished difference Result 52 states and 100 transitions. [2020-10-15 19:11:07,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 19:11:07,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-10-15 19:11:07,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:07,208 INFO L225 Difference]: With dead ends: 52 [2020-10-15 19:11:07,209 INFO L226 Difference]: Without dead ends: 52 [2020-10-15 19:11:07,210 INFO L677 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 [2020-10-15 19:11:07,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-15 19:11:07,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-15 19:11:07,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 19:11:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2020-10-15 19:11:07,251 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 8 [2020-10-15 19:11:07,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:07,251 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2020-10-15 19:11:07,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 19:11:07,251 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2020-10-15 19:11:07,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:11:07,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:07,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:07,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 19:11:07,253 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:07,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:07,254 INFO L82 PathProgramCache]: Analyzing trace with hash 62706239, now seen corresponding path program 1 times [2020-10-15 19:11:07,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:07,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441731180] [2020-10-15 19:11:07,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:11:07,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441731180] [2020-10-15 19:11:07,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:11:07,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 19:11:07,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173677144] [2020-10-15 19:11:07,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 19:11:07,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:07,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 19:11:07,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 19:11:07,322 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand 3 states. [2020-10-15 19:11:07,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:07,338 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2020-10-15 19:11:07,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 19:11:07,339 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-15 19:11:07,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:07,341 INFO L225 Difference]: With dead ends: 64 [2020-10-15 19:11:07,341 INFO L226 Difference]: Without dead ends: 64 [2020-10-15 19:11:07,342 INFO L677 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 [2020-10-15 19:11:07,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-15 19:11:07,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2020-10-15 19:11:07,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 19:11:07,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2020-10-15 19:11:07,350 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 11 [2020-10-15 19:11:07,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:07,350 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2020-10-15 19:11:07,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 19:11:07,351 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2020-10-15 19:11:07,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 19:11:07,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:07,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:07,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 19:11:07,352 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:07,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:07,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1954756591, now seen corresponding path program 1 times [2020-10-15 19:11:07,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:07,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011452319] [2020-10-15 19:11:07,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:11:07,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011452319] [2020-10-15 19:11:07,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908799042] [2020-10-15 19:11:07,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:07,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-15 19:11:07,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:07,555 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-15 19:11:07,555 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-15 19:11:07,558 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-15 19:11:07,559 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-15 19:11:07,559 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-10-15 19:11:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:11:07,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 19:11:07,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-15 19:11:07,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212804697] [2020-10-15 19:11:07,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 19:11:07,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:07,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 19:11:07,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:11:07,578 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand 3 states. [2020-10-15 19:11:07,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:07,616 INFO L93 Difference]: Finished difference Result 40 states and 66 transitions. [2020-10-15 19:11:07,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 19:11:07,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-15 19:11:07,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:07,619 INFO L225 Difference]: With dead ends: 40 [2020-10-15 19:11:07,619 INFO L226 Difference]: Without dead ends: 40 [2020-10-15 19:11:07,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:11:07,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-15 19:11:07,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-15 19:11:07,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 19:11:07,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 66 transitions. [2020-10-15 19:11:07,626 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 66 transitions. Word has length 15 [2020-10-15 19:11:07,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:07,627 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 66 transitions. [2020-10-15 19:11:07,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 19:11:07,627 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 66 transitions. [2020-10-15 19:11:07,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 19:11:07,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:07,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:07,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-15 19:11:07,835 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:07,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:07,838 INFO L82 PathProgramCache]: Analyzing trace with hash 525517821, now seen corresponding path program 2 times [2020-10-15 19:11:07,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:07,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740805563] [2020-10-15 19:11:07,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:11:07,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740805563] [2020-10-15 19:11:07,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594282920] [2020-10-15 19:11:07,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:08,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:11:08,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:08,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-15 19:11:08,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:11:08,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:08,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-15 19:11:08,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527180375] [2020-10-15 19:11:08,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:11:08,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:08,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:11:08,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:11:08,052 INFO L87 Difference]: Start difference. First operand 40 states and 66 transitions. Second operand 6 states. [2020-10-15 19:11:08,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:08,166 INFO L93 Difference]: Finished difference Result 104 states and 159 transitions. [2020-10-15 19:11:08,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:11:08,167 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-15 19:11:08,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:08,168 INFO L225 Difference]: With dead ends: 104 [2020-10-15 19:11:08,168 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 19:11:08,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-15 19:11:08,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 19:11:08,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2020-10-15 19:11:08,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 19:11:08,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 124 transitions. [2020-10-15 19:11:08,179 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 124 transitions. Word has length 15 [2020-10-15 19:11:08,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:08,179 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 124 transitions. [2020-10-15 19:11:08,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:11:08,180 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2020-10-15 19:11:08,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 19:11:08,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:08,181 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:08,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:08,396 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:08,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:08,396 INFO L82 PathProgramCache]: Analyzing trace with hash 485096059, now seen corresponding path program 3 times [2020-10-15 19:11:08,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:08,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821157117] [2020-10-15 19:11:08,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 19:11:08,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821157117] [2020-10-15 19:11:08,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438509645] [2020-10-15 19:11:08,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:08,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:11:08,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:08,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-15 19:11:08,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 19:11:08,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:08,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 19:11:08,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578838993] [2020-10-15 19:11:08,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:11:08,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:08,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:11:08,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:11:08,567 INFO L87 Difference]: Start difference. First operand 79 states and 124 transitions. Second operand 6 states. [2020-10-15 19:11:08,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:08,612 INFO L93 Difference]: Finished difference Result 110 states and 168 transitions. [2020-10-15 19:11:08,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 19:11:08,615 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-15 19:11:08,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:08,616 INFO L225 Difference]: With dead ends: 110 [2020-10-15 19:11:08,616 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 19:11:08,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:11:08,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 19:11:08,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2020-10-15 19:11:08,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 19:11:08,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 154 transitions. [2020-10-15 19:11:08,626 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 154 transitions. Word has length 22 [2020-10-15 19:11:08,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:08,627 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 154 transitions. [2020-10-15 19:11:08,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:11:08,627 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 154 transitions. [2020-10-15 19:11:08,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 19:11:08,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:08,628 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:08,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:08,836 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:08,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:08,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2041399383, now seen corresponding path program 4 times [2020-10-15 19:11:08,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:08,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516616312] [2020-10-15 19:11:08,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-15 19:11:08,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516616312] [2020-10-15 19:11:08,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075992004] [2020-10-15 19:11:08,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:08,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:11:08,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:08,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-15 19:11:08,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-15 19:11:09,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:09,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 19:11:09,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662827287] [2020-10-15 19:11:09,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:11:09,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:09,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:11:09,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:11:09,019 INFO L87 Difference]: Start difference. First operand 100 states and 154 transitions. Second operand 6 states. [2020-10-15 19:11:09,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:09,052 INFO L93 Difference]: Finished difference Result 148 states and 220 transitions. [2020-10-15 19:11:09,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 19:11:09,056 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-15 19:11:09,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:09,058 INFO L225 Difference]: With dead ends: 148 [2020-10-15 19:11:09,058 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 19:11:09,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:11:09,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 19:11:09,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 130. [2020-10-15 19:11:09,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-15 19:11:09,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 196 transitions. [2020-10-15 19:11:09,077 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 196 transitions. Word has length 25 [2020-10-15 19:11:09,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:09,081 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 196 transitions. [2020-10-15 19:11:09,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:11:09,082 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 196 transitions. [2020-10-15 19:11:09,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 19:11:09,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:09,083 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:09,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:09,301 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:09,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:09,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1548321815, now seen corresponding path program 5 times [2020-10-15 19:11:09,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:09,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091774988] [2020-10-15 19:11:09,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-15 19:11:09,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091774988] [2020-10-15 19:11:09,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715503641] [2020-10-15 19:11:09,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:09,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 19:11:09,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:09,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-15 19:11:09,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-15 19:11:09,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:09,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 19:11:09,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022846516] [2020-10-15 19:11:09,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 19:11:09,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:09,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 19:11:09,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-15 19:11:09,464 INFO L87 Difference]: Start difference. First operand 130 states and 196 transitions. Second operand 7 states. [2020-10-15 19:11:09,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:09,495 INFO L93 Difference]: Finished difference Result 178 states and 262 transitions. [2020-10-15 19:11:09,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 19:11:09,497 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-15 19:11:09,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:09,499 INFO L225 Difference]: With dead ends: 178 [2020-10-15 19:11:09,499 INFO L226 Difference]: Without dead ends: 178 [2020-10-15 19:11:09,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-15 19:11:09,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-15 19:11:09,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 160. [2020-10-15 19:11:09,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 19:11:09,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 238 transitions. [2020-10-15 19:11:09,521 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 238 transitions. Word has length 29 [2020-10-15 19:11:09,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:09,522 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 238 transitions. [2020-10-15 19:11:09,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 19:11:09,522 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 238 transitions. [2020-10-15 19:11:09,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 19:11:09,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:09,525 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:09,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-15 19:11:09,725 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:09,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:09,726 INFO L82 PathProgramCache]: Analyzing trace with hash -2012714619, now seen corresponding path program 6 times [2020-10-15 19:11:09,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:09,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610999140] [2020-10-15 19:11:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-15 19:11:09,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610999140] [2020-10-15 19:11:09,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859413708] [2020-10-15 19:11:09,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:09,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 19:11:09,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:09,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-15 19:11:09,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-15 19:11:09,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:09,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-10-15 19:11:09,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903804574] [2020-10-15 19:11:09,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:11:09,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:09,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:11:09,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:11:09,984 INFO L87 Difference]: Start difference. First operand 160 states and 238 transitions. Second operand 11 states. [2020-10-15 19:11:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:10,472 INFO L93 Difference]: Finished difference Result 266 states and 378 transitions. [2020-10-15 19:11:10,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 19:11:10,473 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-15 19:11:10,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:10,475 INFO L225 Difference]: With dead ends: 266 [2020-10-15 19:11:10,475 INFO L226 Difference]: Without dead ends: 266 [2020-10-15 19:11:10,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2020-10-15 19:11:10,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-15 19:11:10,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 229. [2020-10-15 19:11:10,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-15 19:11:10,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 331 transitions. [2020-10-15 19:11:10,500 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 331 transitions. Word has length 33 [2020-10-15 19:11:10,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:10,501 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 331 transitions. [2020-10-15 19:11:10,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:11:10,504 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 331 transitions. [2020-10-15 19:11:10,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 19:11:10,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:10,507 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:10,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:10,724 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:10,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:10,724 INFO L82 PathProgramCache]: Analyzing trace with hash -480954575, now seen corresponding path program 7 times [2020-10-15 19:11:10,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:10,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257387024] [2020-10-15 19:11:10,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-15 19:11:10,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257387024] [2020-10-15 19:11:10,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893876584] [2020-10-15 19:11:10,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:10,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 19:11:10,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-15 19:11:10,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:10,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 19:11:10,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818102849] [2020-10-15 19:11:10,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 19:11:10,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:10,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 19:11:10,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:11:10,911 INFO L87 Difference]: Start difference. First operand 229 states and 331 transitions. Second operand 9 states. [2020-10-15 19:11:10,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:10,950 INFO L93 Difference]: Finished difference Result 286 states and 407 transitions. [2020-10-15 19:11:10,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:11:10,951 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-15 19:11:10,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:10,953 INFO L225 Difference]: With dead ends: 286 [2020-10-15 19:11:10,953 INFO L226 Difference]: Without dead ends: 286 [2020-10-15 19:11:10,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:11:10,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-15 19:11:10,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 265. [2020-10-15 19:11:10,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-15 19:11:10,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 380 transitions. [2020-10-15 19:11:10,964 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 380 transitions. Word has length 40 [2020-10-15 19:11:10,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:10,964 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 380 transitions. [2020-10-15 19:11:10,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 19:11:10,965 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 380 transitions. [2020-10-15 19:11:10,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 19:11:10,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:10,966 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:11,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:11,180 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:11,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:11,180 INFO L82 PathProgramCache]: Analyzing trace with hash -870694653, now seen corresponding path program 8 times [2020-10-15 19:11:11,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:11,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158288899] [2020-10-15 19:11:11,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-15 19:11:11,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158288899] [2020-10-15 19:11:11,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283655875] [2020-10-15 19:11:11,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:11,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:11:11,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:11,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:11:11,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:11,377 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-15 19:11:11,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:11,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 19:11:11,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546706162] [2020-10-15 19:11:11,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 19:11:11,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:11,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 19:11:11,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-15 19:11:11,380 INFO L87 Difference]: Start difference. First operand 265 states and 380 transitions. Second operand 10 states. [2020-10-15 19:11:11,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:11,425 INFO L93 Difference]: Finished difference Result 322 states and 456 transitions. [2020-10-15 19:11:11,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:11:11,426 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-15 19:11:11,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:11,428 INFO L225 Difference]: With dead ends: 322 [2020-10-15 19:11:11,428 INFO L226 Difference]: Without dead ends: 322 [2020-10-15 19:11:11,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-15 19:11:11,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-15 19:11:11,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 301. [2020-10-15 19:11:11,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-15 19:11:11,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 429 transitions. [2020-10-15 19:11:11,439 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 429 transitions. Word has length 44 [2020-10-15 19:11:11,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:11,440 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 429 transitions. [2020-10-15 19:11:11,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 19:11:11,440 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 429 transitions. [2020-10-15 19:11:11,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-15 19:11:11,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:11,441 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:11,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-15 19:11:11,657 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:11,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:11,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1422004693, now seen corresponding path program 9 times [2020-10-15 19:11:11,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:11,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702530314] [2020-10-15 19:11:11,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-15 19:11:11,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702530314] [2020-10-15 19:11:11,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207864386] [2020-10-15 19:11:11,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:11,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 19:11:11,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:11,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-15 19:11:11,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-15 19:11:11,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:11,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2020-10-15 19:11:11,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361702257] [2020-10-15 19:11:11,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:11:11,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:11,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:11:11,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:11:11,949 INFO L87 Difference]: Start difference. First operand 301 states and 429 transitions. Second operand 15 states. [2020-10-15 19:11:12,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:12,886 INFO L93 Difference]: Finished difference Result 440 states and 606 transitions. [2020-10-15 19:11:12,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-15 19:11:12,886 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-15 19:11:12,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:12,888 INFO L225 Difference]: With dead ends: 440 [2020-10-15 19:11:12,889 INFO L226 Difference]: Without dead ends: 440 [2020-10-15 19:11:12,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=945, Invalid=2025, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 19:11:12,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-10-15 19:11:12,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 394. [2020-10-15 19:11:12,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-15 19:11:12,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 550 transitions. [2020-10-15 19:11:12,900 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 550 transitions. Word has length 48 [2020-10-15 19:11:12,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:12,900 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 550 transitions. [2020-10-15 19:11:12,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:11:12,900 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 550 transitions. [2020-10-15 19:11:12,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-15 19:11:12,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:12,902 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:13,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:13,115 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:13,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:13,116 INFO L82 PathProgramCache]: Analyzing trace with hash 314386685, now seen corresponding path program 10 times [2020-10-15 19:11:13,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:13,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780753609] [2020-10-15 19:11:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 13 proven. 120 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-15 19:11:13,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780753609] [2020-10-15 19:11:13,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324450476] [2020-10-15 19:11:13,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:13,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:11:13,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:13,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:11:13,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 13 proven. 120 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-15 19:11:13,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:13,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 19:11:13,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709885361] [2020-10-15 19:11:13,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 19:11:13,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:13,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 19:11:13,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:11:13,377 INFO L87 Difference]: Start difference. First operand 394 states and 550 transitions. Second operand 12 states. [2020-10-15 19:11:13,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:13,420 INFO L93 Difference]: Finished difference Result 460 states and 636 transitions. [2020-10-15 19:11:13,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:11:13,421 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-15 19:11:13,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:13,423 INFO L225 Difference]: With dead ends: 460 [2020-10-15 19:11:13,423 INFO L226 Difference]: Without dead ends: 460 [2020-10-15 19:11:13,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:11:13,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-15 19:11:13,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 436. [2020-10-15 19:11:13,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-10-15 19:11:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 606 transitions. [2020-10-15 19:11:13,434 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 606 transitions. Word has length 55 [2020-10-15 19:11:13,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:13,434 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 606 transitions. [2020-10-15 19:11:13,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 19:11:13,434 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 606 transitions. [2020-10-15 19:11:13,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-15 19:11:13,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:13,436 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:13,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:13,651 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:13,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:13,651 INFO L82 PathProgramCache]: Analyzing trace with hash 298647787, now seen corresponding path program 11 times [2020-10-15 19:11:13,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:13,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677148902] [2020-10-15 19:11:13,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:13,772 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 13 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-15 19:11:13,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677148902] [2020-10-15 19:11:13,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551172273] [2020-10-15 19:11:13,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:13,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 19:11:13,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:13,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:11:13,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 13 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-15 19:11:13,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:13,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 19:11:13,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852391239] [2020-10-15 19:11:13,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:11:13,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:13,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:11:13,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:11:13,882 INFO L87 Difference]: Start difference. First operand 436 states and 606 transitions. Second operand 13 states. [2020-10-15 19:11:13,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:13,921 INFO L93 Difference]: Finished difference Result 502 states and 692 transitions. [2020-10-15 19:11:13,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:11:13,922 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-10-15 19:11:13,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:13,924 INFO L225 Difference]: With dead ends: 502 [2020-10-15 19:11:13,924 INFO L226 Difference]: Without dead ends: 502 [2020-10-15 19:11:13,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:11:13,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-10-15 19:11:13,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 478. [2020-10-15 19:11:13,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-10-15 19:11:13,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 662 transitions. [2020-10-15 19:11:13,934 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 662 transitions. Word has length 59 [2020-10-15 19:11:13,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:13,935 INFO L481 AbstractCegarLoop]: Abstraction has 478 states and 662 transitions. [2020-10-15 19:11:13,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:11:13,935 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 662 transitions. [2020-10-15 19:11:13,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-15 19:11:13,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:13,937 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:14,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 19:11:14,151 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:14,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:14,152 INFO L82 PathProgramCache]: Analyzing trace with hash -734842407, now seen corresponding path program 12 times [2020-10-15 19:11:14,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:14,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141029465] [2020-10-15 19:11:14,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 13 proven. 190 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-15 19:11:14,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141029465] [2020-10-15 19:11:14,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552850083] [2020-10-15 19:11:14,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:14,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 19:11:14,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:14,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 19:11:14,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-15 19:11:14,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:14,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2020-10-15 19:11:14,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127741503] [2020-10-15 19:11:14,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 19:11:14,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:14,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 19:11:14,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:11:14,565 INFO L87 Difference]: Start difference. First operand 478 states and 662 transitions. Second operand 19 states. [2020-10-15 19:11:16,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:16,346 INFO L93 Difference]: Finished difference Result 650 states and 876 transitions. [2020-10-15 19:11:16,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-15 19:11:16,347 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2020-10-15 19:11:16,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:16,351 INFO L225 Difference]: With dead ends: 650 [2020-10-15 19:11:16,351 INFO L226 Difference]: Without dead ends: 650 [2020-10-15 19:11:16,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2205 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2184, Invalid=4956, Unknown=0, NotChecked=0, Total=7140 [2020-10-15 19:11:16,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2020-10-15 19:11:16,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 595. [2020-10-15 19:11:16,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2020-10-15 19:11:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 811 transitions. [2020-10-15 19:11:16,368 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 811 transitions. Word has length 63 [2020-10-15 19:11:16,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:16,369 INFO L481 AbstractCegarLoop]: Abstraction has 595 states and 811 transitions. [2020-10-15 19:11:16,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 19:11:16,369 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 811 transitions. [2020-10-15 19:11:16,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-15 19:11:16,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:16,371 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:16,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-15 19:11:16,586 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:16,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:16,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1647338205, now seen corresponding path program 13 times [2020-10-15 19:11:16,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:16,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096096918] [2020-10-15 19:11:16,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-15 19:11:16,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096096918] [2020-10-15 19:11:16,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507372401] [2020-10-15 19:11:16,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:17,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 19:11:17,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-15 19:11:17,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:17,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 19:11:17,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601678995] [2020-10-15 19:11:17,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:11:17,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:17,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:11:17,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:11:17,067 INFO L87 Difference]: Start difference. First operand 595 states and 811 transitions. Second operand 15 states. [2020-10-15 19:11:17,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:17,136 INFO L93 Difference]: Finished difference Result 670 states and 907 transitions. [2020-10-15 19:11:17,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:11:17,136 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2020-10-15 19:11:17,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:17,140 INFO L225 Difference]: With dead ends: 670 [2020-10-15 19:11:17,140 INFO L226 Difference]: Without dead ends: 670 [2020-10-15 19:11:17,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:11:17,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-10-15 19:11:17,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 643. [2020-10-15 19:11:17,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-10-15 19:11:17,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 874 transitions. [2020-10-15 19:11:17,155 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 874 transitions. Word has length 70 [2020-10-15 19:11:17,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:17,156 INFO L481 AbstractCegarLoop]: Abstraction has 643 states and 874 transitions. [2020-10-15 19:11:17,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:11:17,156 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 874 transitions. [2020-10-15 19:11:17,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-15 19:11:17,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:17,158 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:17,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 19:11:17,374 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:17,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:17,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1171001041, now seen corresponding path program 14 times [2020-10-15 19:11:17,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:17,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087317803] [2020-10-15 19:11:17,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 16 proven. 276 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-15 19:11:17,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087317803] [2020-10-15 19:11:17,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802783985] [2020-10-15 19:11:17,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:17,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:11:17,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:17,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 19:11:17,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 16 proven. 276 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-15 19:11:17,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:17,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 19:11:17,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669063821] [2020-10-15 19:11:17,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 19:11:17,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:17,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 19:11:17,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:11:17,652 INFO L87 Difference]: Start difference. First operand 643 states and 874 transitions. Second operand 16 states. [2020-10-15 19:11:17,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:17,708 INFO L93 Difference]: Finished difference Result 718 states and 970 transitions. [2020-10-15 19:11:17,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:11:17,708 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 74 [2020-10-15 19:11:17,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:17,712 INFO L225 Difference]: With dead ends: 718 [2020-10-15 19:11:17,712 INFO L226 Difference]: Without dead ends: 718 [2020-10-15 19:11:17,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:11:17,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2020-10-15 19:11:17,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 691. [2020-10-15 19:11:17,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-10-15 19:11:17,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 937 transitions. [2020-10-15 19:11:17,726 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 937 transitions. Word has length 74 [2020-10-15 19:11:17,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:17,727 INFO L481 AbstractCegarLoop]: Abstraction has 691 states and 937 transitions. [2020-10-15 19:11:17,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 19:11:17,727 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 937 transitions. [2020-10-15 19:11:17,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-15 19:11:17,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:17,729 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:17,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:17,944 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:17,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:17,944 INFO L82 PathProgramCache]: Analyzing trace with hash 776210049, now seen corresponding path program 15 times [2020-10-15 19:11:17,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:17,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977146826] [2020-10-15 19:11:17,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 325 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-15 19:11:18,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977146826] [2020-10-15 19:11:18,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299073087] [2020-10-15 19:11:18,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:18,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 19:11:18,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:18,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:11:18,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-10-15 19:11:18,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:18,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2020-10-15 19:11:18,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825773950] [2020-10-15 19:11:18,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 19:11:18,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:18,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 19:11:18,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:11:18,342 INFO L87 Difference]: Start difference. First operand 691 states and 937 transitions. Second operand 23 states. [2020-10-15 19:11:21,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:21,840 INFO L93 Difference]: Finished difference Result 896 states and 1188 transitions. [2020-10-15 19:11:21,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-10-15 19:11:21,841 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 78 [2020-10-15 19:11:21,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:21,845 INFO L225 Difference]: With dead ends: 896 [2020-10-15 19:11:21,846 INFO L226 Difference]: Without dead ends: 896 [2020-10-15 19:11:21,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4844 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4320, Invalid=10200, Unknown=0, NotChecked=0, Total=14520 [2020-10-15 19:11:21,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2020-10-15 19:11:21,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 832. [2020-10-15 19:11:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2020-10-15 19:11:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1114 transitions. [2020-10-15 19:11:21,868 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1114 transitions. Word has length 78 [2020-10-15 19:11:21,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:21,869 INFO L481 AbstractCegarLoop]: Abstraction has 832 states and 1114 transitions. [2020-10-15 19:11:21,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 19:11:21,869 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1114 transitions. [2020-10-15 19:11:21,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-15 19:11:21,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:21,871 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:22,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 19:11:22,085 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:22,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:22,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1559138385, now seen corresponding path program 16 times [2020-10-15 19:11:22,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:22,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739549747] [2020-10-15 19:11:22,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 19 proven. 378 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-15 19:11:22,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739549747] [2020-10-15 19:11:22,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423061368] [2020-10-15 19:11:22,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:22,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:11:22,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:22,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 19:11:22,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 19 proven. 378 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-15 19:11:22,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:22,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 19:11:22,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626367103] [2020-10-15 19:11:22,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 19:11:22,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:22,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 19:11:22,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:11:22,700 INFO L87 Difference]: Start difference. First operand 832 states and 1114 transitions. Second operand 18 states. [2020-10-15 19:11:22,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:22,768 INFO L93 Difference]: Finished difference Result 916 states and 1220 transitions. [2020-10-15 19:11:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:11:22,769 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-10-15 19:11:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:22,773 INFO L225 Difference]: With dead ends: 916 [2020-10-15 19:11:22,773 INFO L226 Difference]: Without dead ends: 916 [2020-10-15 19:11:22,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:11:22,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2020-10-15 19:11:22,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 886. [2020-10-15 19:11:22,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2020-10-15 19:11:22,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1184 transitions. [2020-10-15 19:11:22,792 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1184 transitions. Word has length 85 [2020-10-15 19:11:22,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:22,792 INFO L481 AbstractCegarLoop]: Abstraction has 886 states and 1184 transitions. [2020-10-15 19:11:22,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 19:11:22,793 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1184 transitions. [2020-10-15 19:11:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-15 19:11:22,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:22,795 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:23,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 19:11:23,009 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:23,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:23,009 INFO L82 PathProgramCache]: Analyzing trace with hash -933866561, now seen corresponding path program 17 times [2020-10-15 19:11:23,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:23,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441610594] [2020-10-15 19:11:23,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 19 proven. 435 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-15 19:11:23,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441610594] [2020-10-15 19:11:23,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587906155] [2020-10-15 19:11:23,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:23,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-10-15 19:11:23,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:23,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 19:11:23,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 19 proven. 435 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-15 19:11:23,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:23,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 19:11:23,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919870143] [2020-10-15 19:11:23,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 19:11:23,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:23,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 19:11:23,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:11:23,489 INFO L87 Difference]: Start difference. First operand 886 states and 1184 transitions. Second operand 19 states. [2020-10-15 19:11:23,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:23,580 INFO L93 Difference]: Finished difference Result 970 states and 1290 transitions. [2020-10-15 19:11:23,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:11:23,580 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 89 [2020-10-15 19:11:23,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:23,585 INFO L225 Difference]: With dead ends: 970 [2020-10-15 19:11:23,585 INFO L226 Difference]: Without dead ends: 970 [2020-10-15 19:11:23,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:11:23,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-10-15 19:11:23,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 940. [2020-10-15 19:11:23,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 940 states. [2020-10-15 19:11:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1254 transitions. [2020-10-15 19:11:23,607 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1254 transitions. Word has length 89 [2020-10-15 19:11:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:23,608 INFO L481 AbstractCegarLoop]: Abstraction has 940 states and 1254 transitions. [2020-10-15 19:11:23,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 19:11:23,608 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1254 transitions. [2020-10-15 19:11:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-15 19:11:23,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:23,611 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:23,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:23,824 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:23,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:23,825 INFO L82 PathProgramCache]: Analyzing trace with hash -365776851, now seen corresponding path program 18 times [2020-10-15 19:11:23,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:23,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433180098] [2020-10-15 19:11:23,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 19 proven. 496 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-15 19:11:24,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433180098] [2020-10-15 19:11:24,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025137442] [2020-10-15 19:11:24,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:24,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-10-15 19:11:24,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:24,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:11:24,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-10-15 19:11:24,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:24,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2020-10-15 19:11:24,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889338141] [2020-10-15 19:11:24,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 19:11:24,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:24,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 19:11:24,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:11:24,623 INFO L87 Difference]: Start difference. First operand 940 states and 1254 transitions. Second operand 27 states. [2020-10-15 19:11:30,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:30,376 INFO L93 Difference]: Finished difference Result 1178 states and 1542 transitions. [2020-10-15 19:11:30,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2020-10-15 19:11:30,377 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 93 [2020-10-15 19:11:30,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:30,382 INFO L225 Difference]: With dead ends: 1178 [2020-10-15 19:11:30,383 INFO L226 Difference]: Without dead ends: 1178 [2020-10-15 19:11:30,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9308 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7695, Invalid=18711, Unknown=0, NotChecked=0, Total=26406 [2020-10-15 19:11:30,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2020-10-15 19:11:30,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1105. [2020-10-15 19:11:30,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1105 states. [2020-10-15 19:11:30,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1459 transitions. [2020-10-15 19:11:30,408 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1459 transitions. Word has length 93 [2020-10-15 19:11:30,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:30,408 INFO L481 AbstractCegarLoop]: Abstraction has 1105 states and 1459 transitions. [2020-10-15 19:11:30,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 19:11:30,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1459 transitions. [2020-10-15 19:11:30,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-15 19:11:30,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:30,412 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:30,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:30,624 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:30,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:30,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2077738871, now seen corresponding path program 19 times [2020-10-15 19:11:30,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:30,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265857322] [2020-10-15 19:11:30,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 22 proven. 561 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-15 19:11:30,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265857322] [2020-10-15 19:11:30,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617933908] [2020-10-15 19:11:30,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:31,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 19:11:31,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 22 proven. 561 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-15 19:11:31,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:31,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 19:11:31,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096207382] [2020-10-15 19:11:31,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 19:11:31,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:31,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 19:11:31,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:11:31,120 INFO L87 Difference]: Start difference. First operand 1105 states and 1459 transitions. Second operand 21 states. [2020-10-15 19:11:31,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:31,255 INFO L93 Difference]: Finished difference Result 1198 states and 1575 transitions. [2020-10-15 19:11:31,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:11:31,256 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2020-10-15 19:11:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:31,263 INFO L225 Difference]: With dead ends: 1198 [2020-10-15 19:11:31,263 INFO L226 Difference]: Without dead ends: 1198 [2020-10-15 19:11:31,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:11:31,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2020-10-15 19:11:31,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1165. [2020-10-15 19:11:31,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1165 states. [2020-10-15 19:11:31,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1536 transitions. [2020-10-15 19:11:31,288 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1536 transitions. Word has length 100 [2020-10-15 19:11:31,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:31,289 INFO L481 AbstractCegarLoop]: Abstraction has 1165 states and 1536 transitions. [2020-10-15 19:11:31,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 19:11:31,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1536 transitions. [2020-10-15 19:11:31,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-15 19:11:31,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:31,293 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:31,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:31,508 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:31,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:31,508 INFO L82 PathProgramCache]: Analyzing trace with hash 110062427, now seen corresponding path program 20 times [2020-10-15 19:11:31,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:31,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873927923] [2020-10-15 19:11:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-15 19:11:31,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873927923] [2020-10-15 19:11:31,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418828278] [2020-10-15 19:11:31,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:31,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:11:31,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:32,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 19:11:32,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-15 19:11:32,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:32,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 19:11:32,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963134348] [2020-10-15 19:11:32,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 19:11:32,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:32,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 19:11:32,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:11:32,062 INFO L87 Difference]: Start difference. First operand 1165 states and 1536 transitions. Second operand 22 states. [2020-10-15 19:11:32,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:32,162 INFO L93 Difference]: Finished difference Result 1258 states and 1652 transitions. [2020-10-15 19:11:32,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:11:32,162 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 104 [2020-10-15 19:11:32,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:32,169 INFO L225 Difference]: With dead ends: 1258 [2020-10-15 19:11:32,169 INFO L226 Difference]: Without dead ends: 1258 [2020-10-15 19:11:32,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:11:32,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2020-10-15 19:11:32,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1225. [2020-10-15 19:11:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1225 states. [2020-10-15 19:11:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1613 transitions. [2020-10-15 19:11:32,199 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1613 transitions. Word has length 104 [2020-10-15 19:11:32,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:32,200 INFO L481 AbstractCegarLoop]: Abstraction has 1225 states and 1613 transitions. [2020-10-15 19:11:32,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 19:11:32,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1613 transitions. [2020-10-15 19:11:32,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-15 19:11:32,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:32,206 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:32,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-15 19:11:32,420 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:32,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:32,421 INFO L82 PathProgramCache]: Analyzing trace with hash -912464595, now seen corresponding path program 21 times [2020-10-15 19:11:32,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:32,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751544586] [2020-10-15 19:11:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 22 proven. 703 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-15 19:11:32,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751544586] [2020-10-15 19:11:32,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365374891] [2020-10-15 19:11:32,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:33,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 19:11:33,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:33,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:11:33,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2020-10-15 19:11:33,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:33,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11] total 31 [2020-10-15 19:11:33,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142453193] [2020-10-15 19:11:33,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 19:11:33,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:33,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 19:11:33,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2020-10-15 19:11:33,277 INFO L87 Difference]: Start difference. First operand 1225 states and 1613 transitions. Second operand 31 states. [2020-10-15 19:11:42,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:42,535 INFO L93 Difference]: Finished difference Result 1460 states and 1896 transitions. [2020-10-15 19:11:42,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2020-10-15 19:11:42,536 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 108 [2020-10-15 19:11:42,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:42,542 INFO L225 Difference]: With dead ends: 1460 [2020-10-15 19:11:42,542 INFO L226 Difference]: Without dead ends: 1460 [2020-10-15 19:11:42,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16281 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=12705, Invalid=31605, Unknown=0, NotChecked=0, Total=44310 [2020-10-15 19:11:42,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-10-15 19:11:42,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1414. [2020-10-15 19:11:42,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1414 states. [2020-10-15 19:11:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1846 transitions. [2020-10-15 19:11:42,571 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1846 transitions. Word has length 108 [2020-10-15 19:11:42,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:42,572 INFO L481 AbstractCegarLoop]: Abstraction has 1414 states and 1846 transitions. [2020-10-15 19:11:42,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 19:11:42,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1846 transitions. [2020-10-15 19:11:42,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-15 19:11:42,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:42,576 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:42,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-15 19:11:42,790 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:42,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:42,791 INFO L82 PathProgramCache]: Analyzing trace with hash 2018487717, now seen corresponding path program 22 times [2020-10-15 19:11:42,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:42,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90918861] [2020-10-15 19:11:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:42,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90918861] [2020-10-15 19:11:42,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443055935] [2020-10-15 19:11:42,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:43,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:11:43,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:43,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:11:43,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:43,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:43,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 19:11:43,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120288248] [2020-10-15 19:11:43,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:11:43,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:43,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:11:43,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:11:43,811 INFO L87 Difference]: Start difference. First operand 1414 states and 1846 transitions. Second operand 13 states. [2020-10-15 19:11:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:43,894 INFO L93 Difference]: Finished difference Result 1589 states and 2052 transitions. [2020-10-15 19:11:43,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:11:43,895 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 115 [2020-10-15 19:11:43,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:43,901 INFO L225 Difference]: With dead ends: 1589 [2020-10-15 19:11:43,901 INFO L226 Difference]: Without dead ends: 1589 [2020-10-15 19:11:43,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:11:43,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2020-10-15 19:11:43,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1543. [2020-10-15 19:11:43,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-10-15 19:11:43,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2002 transitions. [2020-10-15 19:11:43,926 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2002 transitions. Word has length 115 [2020-10-15 19:11:43,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:43,928 INFO L481 AbstractCegarLoop]: Abstraction has 1543 states and 2002 transitions. [2020-10-15 19:11:43,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:11:43,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2002 transitions. [2020-10-15 19:11:43,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-15 19:11:43,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:43,933 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:44,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:44,142 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:44,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:44,142 INFO L82 PathProgramCache]: Analyzing trace with hash -2042676161, now seen corresponding path program 23 times [2020-10-15 19:11:44,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:44,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161125221] [2020-10-15 19:11:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:44,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161125221] [2020-10-15 19:11:44,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770359550] [2020-10-15 19:11:44,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:44,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-10-15 19:11:44,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:44,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 19:11:44,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:44,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:44,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 19:11:44,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714857991] [2020-10-15 19:11:44,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 19:11:44,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:44,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 19:11:44,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:11:44,729 INFO L87 Difference]: Start difference. First operand 1543 states and 2002 transitions. Second operand 14 states. [2020-10-15 19:11:44,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:44,837 INFO L93 Difference]: Finished difference Result 1718 states and 2208 transitions. [2020-10-15 19:11:44,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:11:44,837 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 118 [2020-10-15 19:11:44,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:44,847 INFO L225 Difference]: With dead ends: 1718 [2020-10-15 19:11:44,847 INFO L226 Difference]: Without dead ends: 1718 [2020-10-15 19:11:44,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:11:44,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2020-10-15 19:11:44,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1672. [2020-10-15 19:11:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2020-10-15 19:11:44,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2158 transitions. [2020-10-15 19:11:44,887 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2158 transitions. Word has length 118 [2020-10-15 19:11:44,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:44,887 INFO L481 AbstractCegarLoop]: Abstraction has 1672 states and 2158 transitions. [2020-10-15 19:11:44,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 19:11:44,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2158 transitions. [2020-10-15 19:11:44,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-15 19:11:44,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:44,895 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:45,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-15 19:11:45,110 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:45,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:45,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1052962661, now seen corresponding path program 24 times [2020-10-15 19:11:45,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:45,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371852856] [2020-10-15 19:11:45,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:45,396 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:45,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371852856] [2020-10-15 19:11:45,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048701283] [2020-10-15 19:11:45,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:46,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-10-15 19:11:46,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:46,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 19:11:46,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:46,230 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:46,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:46,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 19:11:46,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058537205] [2020-10-15 19:11:46,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:11:46,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:46,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:11:46,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:11:46,232 INFO L87 Difference]: Start difference. First operand 1672 states and 2158 transitions. Second operand 15 states. [2020-10-15 19:11:46,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:46,341 INFO L93 Difference]: Finished difference Result 1847 states and 2364 transitions. [2020-10-15 19:11:46,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:11:46,342 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-10-15 19:11:46,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:46,349 INFO L225 Difference]: With dead ends: 1847 [2020-10-15 19:11:46,349 INFO L226 Difference]: Without dead ends: 1847 [2020-10-15 19:11:46,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:11:46,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2020-10-15 19:11:46,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1801. [2020-10-15 19:11:46,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1801 states. [2020-10-15 19:11:46,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2314 transitions. [2020-10-15 19:11:46,408 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2314 transitions. Word has length 121 [2020-10-15 19:11:46,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:46,408 INFO L481 AbstractCegarLoop]: Abstraction has 1801 states and 2314 transitions. [2020-10-15 19:11:46,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:11:46,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2314 transitions. [2020-10-15 19:11:46,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-15 19:11:46,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:46,413 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:46,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:46,628 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:46,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:46,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1691329151, now seen corresponding path program 25 times [2020-10-15 19:11:46,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:46,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769476456] [2020-10-15 19:11:46,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:46,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769476456] [2020-10-15 19:11:46,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217308857] [2020-10-15 19:11:46,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:47,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 19:11:47,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:47,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:47,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 19:11:47,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958167467] [2020-10-15 19:11:47,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 19:11:47,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:47,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 19:11:47,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:11:47,142 INFO L87 Difference]: Start difference. First operand 1801 states and 2314 transitions. Second operand 16 states. [2020-10-15 19:11:47,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:47,295 INFO L93 Difference]: Finished difference Result 1976 states and 2520 transitions. [2020-10-15 19:11:47,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:11:47,295 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 124 [2020-10-15 19:11:47,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:47,304 INFO L225 Difference]: With dead ends: 1976 [2020-10-15 19:11:47,305 INFO L226 Difference]: Without dead ends: 1976 [2020-10-15 19:11:47,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:11:47,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2020-10-15 19:11:47,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2020-10-15 19:11:47,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-10-15 19:11:47,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2470 transitions. [2020-10-15 19:11:47,335 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2470 transitions. Word has length 124 [2020-10-15 19:11:47,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:47,336 INFO L481 AbstractCegarLoop]: Abstraction has 1930 states and 2470 transitions. [2020-10-15 19:11:47,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 19:11:47,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2470 transitions. [2020-10-15 19:11:47,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-15 19:11:47,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:47,341 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:47,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-15 19:11:47,557 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:47,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:47,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1152246053, now seen corresponding path program 26 times [2020-10-15 19:11:47,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:47,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271024582] [2020-10-15 19:11:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:47,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271024582] [2020-10-15 19:11:47,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360482390] [2020-10-15 19:11:47,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:47,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:11:47,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:47,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 19:11:47,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:47,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:47,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 19:11:47,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966787822] [2020-10-15 19:11:47,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:11:47,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:47,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:11:47,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:11:47,993 INFO L87 Difference]: Start difference. First operand 1930 states and 2470 transitions. Second operand 17 states. [2020-10-15 19:11:48,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:48,069 INFO L93 Difference]: Finished difference Result 2105 states and 2676 transitions. [2020-10-15 19:11:48,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:11:48,070 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 127 [2020-10-15 19:11:48,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:48,083 INFO L225 Difference]: With dead ends: 2105 [2020-10-15 19:11:48,083 INFO L226 Difference]: Without dead ends: 2105 [2020-10-15 19:11:48,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:11:48,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2020-10-15 19:11:48,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2059. [2020-10-15 19:11:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2059 states. [2020-10-15 19:11:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 2626 transitions. [2020-10-15 19:11:48,116 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 2626 transitions. Word has length 127 [2020-10-15 19:11:48,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:48,117 INFO L481 AbstractCegarLoop]: Abstraction has 2059 states and 2626 transitions. [2020-10-15 19:11:48,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:11:48,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 2626 transitions. [2020-10-15 19:11:48,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-15 19:11:48,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:48,123 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:48,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 19:11:48,338 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:48,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:48,342 INFO L82 PathProgramCache]: Analyzing trace with hash 210393279, now seen corresponding path program 27 times [2020-10-15 19:11:48,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:48,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815598545] [2020-10-15 19:11:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:48,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815598545] [2020-10-15 19:11:48,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633687760] [2020-10-15 19:11:48,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:49,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-10-15 19:11:49,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:49,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 19:11:49,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:49,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:49,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 19:11:49,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217093443] [2020-10-15 19:11:49,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 19:11:49,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:49,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 19:11:49,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:11:49,157 INFO L87 Difference]: Start difference. First operand 2059 states and 2626 transitions. Second operand 18 states. [2020-10-15 19:11:49,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:49,233 INFO L93 Difference]: Finished difference Result 2234 states and 2832 transitions. [2020-10-15 19:11:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:11:49,234 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 130 [2020-10-15 19:11:49,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:49,242 INFO L225 Difference]: With dead ends: 2234 [2020-10-15 19:11:49,243 INFO L226 Difference]: Without dead ends: 2234 [2020-10-15 19:11:49,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:11:49,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2020-10-15 19:11:49,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2188. [2020-10-15 19:11:49,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2188 states. [2020-10-15 19:11:49,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2782 transitions. [2020-10-15 19:11:49,278 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2782 transitions. Word has length 130 [2020-10-15 19:11:49,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:49,279 INFO L481 AbstractCegarLoop]: Abstraction has 2188 states and 2782 transitions. [2020-10-15 19:11:49,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 19:11:49,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2782 transitions. [2020-10-15 19:11:49,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-15 19:11:49,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:49,284 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:49,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-15 19:11:49,498 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:49,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:49,499 INFO L82 PathProgramCache]: Analyzing trace with hash 495747813, now seen corresponding path program 28 times [2020-10-15 19:11:49,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:49,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153035231] [2020-10-15 19:11:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:49,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153035231] [2020-10-15 19:11:49,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749708770] [2020-10-15 19:11:49,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:51,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:11:51,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:51,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 19:11:51,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:51,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:51,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 19:11:51,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320047235] [2020-10-15 19:11:51,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 19:11:51,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:51,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 19:11:51,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:11:51,387 INFO L87 Difference]: Start difference. First operand 2188 states and 2782 transitions. Second operand 19 states. [2020-10-15 19:11:51,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:51,489 INFO L93 Difference]: Finished difference Result 2363 states and 2988 transitions. [2020-10-15 19:11:51,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:11:51,490 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 133 [2020-10-15 19:11:51,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:51,510 INFO L225 Difference]: With dead ends: 2363 [2020-10-15 19:11:51,510 INFO L226 Difference]: Without dead ends: 2363 [2020-10-15 19:11:51,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:11:51,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2020-10-15 19:11:51,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2317. [2020-10-15 19:11:51,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2020-10-15 19:11:51,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2938 transitions. [2020-10-15 19:11:51,560 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2938 transitions. Word has length 133 [2020-10-15 19:11:51,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:51,560 INFO L481 AbstractCegarLoop]: Abstraction has 2317 states and 2938 transitions. [2020-10-15 19:11:51,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 19:11:51,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2938 transitions. [2020-10-15 19:11:51,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-15 19:11:51,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:51,569 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:51,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:51,787 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:51,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:51,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1752391423, now seen corresponding path program 29 times [2020-10-15 19:11:51,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:51,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13748765] [2020-10-15 19:11:51,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:52,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13748765] [2020-10-15 19:11:52,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221916000] [2020-10-15 19:11:52,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:52,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-10-15 19:11:52,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:52,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 19:11:52,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:52,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:52,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 19:11:52,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056567169] [2020-10-15 19:11:52,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 19:11:52,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:52,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 19:11:52,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:11:52,517 INFO L87 Difference]: Start difference. First operand 2317 states and 2938 transitions. Second operand 20 states. [2020-10-15 19:11:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:52,637 INFO L93 Difference]: Finished difference Result 2492 states and 3144 transitions. [2020-10-15 19:11:52,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:11:52,637 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2020-10-15 19:11:52,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:52,643 INFO L225 Difference]: With dead ends: 2492 [2020-10-15 19:11:52,643 INFO L226 Difference]: Without dead ends: 2492 [2020-10-15 19:11:52,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:11:52,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2020-10-15 19:11:52,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2446. [2020-10-15 19:11:52,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2020-10-15 19:11:52,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3094 transitions. [2020-10-15 19:11:52,686 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3094 transitions. Word has length 136 [2020-10-15 19:11:52,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:52,686 INFO L481 AbstractCegarLoop]: Abstraction has 2446 states and 3094 transitions. [2020-10-15 19:11:52,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 19:11:52,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3094 transitions. [2020-10-15 19:11:52,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-15 19:11:52,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:52,691 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:52,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-15 19:11:52,904 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:52,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:52,905 INFO L82 PathProgramCache]: Analyzing trace with hash -807742299, now seen corresponding path program 30 times [2020-10-15 19:11:52,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:52,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100002483] [2020-10-15 19:11:52,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:53,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100002483] [2020-10-15 19:11:53,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909981188] [2020-10-15 19:11:53,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:53,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-10-15 19:11:53,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:53,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 19:11:53,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:53,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:53,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 19:11:53,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348838839] [2020-10-15 19:11:53,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 19:11:53,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:53,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 19:11:53,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:11:53,823 INFO L87 Difference]: Start difference. First operand 2446 states and 3094 transitions. Second operand 21 states. [2020-10-15 19:11:53,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:53,910 INFO L93 Difference]: Finished difference Result 2621 states and 3300 transitions. [2020-10-15 19:11:53,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:11:53,910 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 139 [2020-10-15 19:11:53,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:53,915 INFO L225 Difference]: With dead ends: 2621 [2020-10-15 19:11:53,915 INFO L226 Difference]: Without dead ends: 2621 [2020-10-15 19:11:53,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:11:53,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2020-10-15 19:11:53,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2575. [2020-10-15 19:11:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2575 states. [2020-10-15 19:11:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 3250 transitions. [2020-10-15 19:11:53,951 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 3250 transitions. Word has length 139 [2020-10-15 19:11:53,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:53,952 INFO L481 AbstractCegarLoop]: Abstraction has 2575 states and 3250 transitions. [2020-10-15 19:11:53,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 19:11:53,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 3250 transitions. [2020-10-15 19:11:53,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-15 19:11:53,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:53,958 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:54,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:54,170 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:54,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:54,171 INFO L82 PathProgramCache]: Analyzing trace with hash 277787967, now seen corresponding path program 31 times [2020-10-15 19:11:54,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:54,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544103120] [2020-10-15 19:11:54,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:54,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544103120] [2020-10-15 19:11:54,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538176653] [2020-10-15 19:11:54,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:54,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 19:11:54,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:54,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:54,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 19:11:54,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969581118] [2020-10-15 19:11:54,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 19:11:54,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:54,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 19:11:54,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:11:54,678 INFO L87 Difference]: Start difference. First operand 2575 states and 3250 transitions. Second operand 22 states. [2020-10-15 19:11:54,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:54,810 INFO L93 Difference]: Finished difference Result 2750 states and 3456 transitions. [2020-10-15 19:11:54,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:11:54,814 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 142 [2020-10-15 19:11:54,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:54,819 INFO L225 Difference]: With dead ends: 2750 [2020-10-15 19:11:54,819 INFO L226 Difference]: Without dead ends: 2750 [2020-10-15 19:11:54,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:11:54,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2020-10-15 19:11:54,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2704. [2020-10-15 19:11:54,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2704 states. [2020-10-15 19:11:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3406 transitions. [2020-10-15 19:11:54,857 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3406 transitions. Word has length 142 [2020-10-15 19:11:54,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:54,858 INFO L481 AbstractCegarLoop]: Abstraction has 2704 states and 3406 transitions. [2020-10-15 19:11:54,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 19:11:54,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3406 transitions. [2020-10-15 19:11:54,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-15 19:11:54,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:54,864 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:55,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-15 19:11:55,078 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:55,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:55,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1793796507, now seen corresponding path program 32 times [2020-10-15 19:11:55,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:55,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736178617] [2020-10-15 19:11:55,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:55,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736178617] [2020-10-15 19:11:55,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71018701] [2020-10-15 19:11:55,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:55,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:11:55,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:55,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 19:11:55,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-15 19:11:55,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:55,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 19:11:55,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639352821] [2020-10-15 19:11:55,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 19:11:55,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:55,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 19:11:55,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:11:55,579 INFO L87 Difference]: Start difference. First operand 2704 states and 3406 transitions. Second operand 23 states. [2020-10-15 19:11:55,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:55,725 INFO L93 Difference]: Finished difference Result 2833 states and 3562 transitions. [2020-10-15 19:11:55,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 19:11:55,726 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 145 [2020-10-15 19:11:55,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:55,732 INFO L225 Difference]: With dead ends: 2833 [2020-10-15 19:11:55,732 INFO L226 Difference]: Without dead ends: 2833 [2020-10-15 19:11:55,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:11:55,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2020-10-15 19:11:55,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2833. [2020-10-15 19:11:55,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2833 states. [2020-10-15 19:11:55,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 3562 transitions. [2020-10-15 19:11:55,763 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 3562 transitions. Word has length 145 [2020-10-15 19:11:55,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:55,764 INFO L481 AbstractCegarLoop]: Abstraction has 2833 states and 3562 transitions. [2020-10-15 19:11:55,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 19:11:55,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 3562 transitions. [2020-10-15 19:11:55,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-15 19:11:55,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:55,770 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:55,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-15 19:11:55,983 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:55,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:55,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1981785217, now seen corresponding path program 33 times [2020-10-15 19:11:55,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:55,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616113035] [2020-10-15 19:11:55,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:11:59,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616113035] [2020-10-15 19:11:59,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21333391] [2020-10-15 19:11:59,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:59,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-10-15 19:11:59,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:59,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-15 19:11:59,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:59,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:11:59,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:59,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-15 19:11:59,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279274539] [2020-10-15 19:11:59,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-15 19:11:59,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:59,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-15 19:11:59,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 19:11:59,923 INFO L87 Difference]: Start difference. First operand 2833 states and 3562 transitions. Second operand 63 states. [2020-10-15 19:13:22,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:13:22,326 INFO L93 Difference]: Finished difference Result 32926 states and 45933 transitions. [2020-10-15 19:13:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2020-10-15 19:13:22,327 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-15 19:13:22,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:13:22,406 INFO L225 Difference]: With dead ends: 32926 [2020-10-15 19:13:22,406 INFO L226 Difference]: Without dead ends: 32924 [2020-10-15 19:13:22,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 632 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162735 ImplicationChecksByTransitivity, 32.8s TimeCoverageRelationStatistics Valid=2407, Invalid=398915, Unknown=0, NotChecked=0, Total=401322 [2020-10-15 19:13:22,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32924 states. [2020-10-15 19:13:22,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32924 to 2967. [2020-10-15 19:13:22,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2967 states. [2020-10-15 19:13:22,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 3794 transitions. [2020-10-15 19:13:22,635 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 3794 transitions. Word has length 148 [2020-10-15 19:13:22,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:13:22,636 INFO L481 AbstractCegarLoop]: Abstraction has 2967 states and 3794 transitions. [2020-10-15 19:13:22,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-15 19:13:22,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 3794 transitions. [2020-10-15 19:13:22,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-15 19:13:22,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:13:22,642 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:13:22,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-15 19:13:22,855 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:13:22,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:13:22,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1970430061, now seen corresponding path program 34 times [2020-10-15 19:13:22,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:13:22,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590116567] [2020-10-15 19:13:22,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:13:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:13:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:13:26,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590116567] [2020-10-15 19:13:26,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671123497] [2020-10-15 19:13:26,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:13:28,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:13:28,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:13:28,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-15 19:13:28,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:13:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:13:28,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:13:28,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-15 19:13:28,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757979788] [2020-10-15 19:13:28,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-15 19:13:28,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:13:28,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-15 19:13:28,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 19:13:28,293 INFO L87 Difference]: Start difference. First operand 2967 states and 3794 transitions. Second operand 63 states. [2020-10-15 19:14:00,191 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-10-15 19:14:46,671 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-10-15 19:14:48,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:14:48,743 INFO L93 Difference]: Finished difference Result 30945 states and 43173 transitions. [2020-10-15 19:14:48,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-10-15 19:14:48,744 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-15 19:14:48,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:14:48,786 INFO L225 Difference]: With dead ends: 30945 [2020-10-15 19:14:48,786 INFO L226 Difference]: Without dead ends: 30943 [2020-10-15 19:14:48,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-10-15 19:14:48,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30943 states. [2020-10-15 19:14:48,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30943 to 2973. [2020-10-15 19:14:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2973 states. [2020-10-15 19:14:48,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3801 transitions. [2020-10-15 19:14:48,969 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3801 transitions. Word has length 148 [2020-10-15 19:14:48,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:14:48,969 INFO L481 AbstractCegarLoop]: Abstraction has 2973 states and 3801 transitions. [2020-10-15 19:14:48,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-15 19:14:48,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3801 transitions. [2020-10-15 19:14:48,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-15 19:14:48,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:14:48,974 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:14:49,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-15 19:14:49,188 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:14:49,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:14:49,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1092472257, now seen corresponding path program 35 times [2020-10-15 19:14:49,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:14:49,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457924034] [2020-10-15 19:14:49,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:14:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:14:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:14:52,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457924034] [2020-10-15 19:14:52,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342526129] [2020-10-15 19:14:52,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:14:52,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-10-15 19:14:52,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:14:52,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-15 19:14:52,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:14:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:14:53,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:14:53,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-15 19:14:53,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144603054] [2020-10-15 19:14:53,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-15 19:14:53,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:14:53,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-15 19:14:53,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 19:14:53,118 INFO L87 Difference]: Start difference. First operand 2973 states and 3801 transitions. Second operand 63 states. [2020-10-15 19:16:15,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:16:15,838 INFO L93 Difference]: Finished difference Result 30939 states and 43164 transitions. [2020-10-15 19:16:15,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-10-15 19:16:15,839 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-15 19:16:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:16:15,878 INFO L225 Difference]: With dead ends: 30939 [2020-10-15 19:16:15,879 INFO L226 Difference]: Without dead ends: 30937 [2020-10-15 19:16:15,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 35.5s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-10-15 19:16:15,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30937 states. [2020-10-15 19:16:16,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30937 to 2979. [2020-10-15 19:16:16,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2979 states. [2020-10-15 19:16:16,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 3808 transitions. [2020-10-15 19:16:16,054 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 3808 transitions. Word has length 148 [2020-10-15 19:16:16,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:16:16,054 INFO L481 AbstractCegarLoop]: Abstraction has 2979 states and 3808 transitions. [2020-10-15 19:16:16,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-15 19:16:16,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 3808 transitions. [2020-10-15 19:16:16,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-15 19:16:16,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:16:16,060 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:16:16,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-15 19:16:16,273 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:16:16,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:16:16,274 INFO L82 PathProgramCache]: Analyzing trace with hash 769524141, now seen corresponding path program 36 times [2020-10-15 19:16:16,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:16:16,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362787218] [2020-10-15 19:16:16,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:16:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:16:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:16:19,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362787218] [2020-10-15 19:16:19,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124853383] [2020-10-15 19:16:19,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:16:20,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-10-15 19:16:20,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:16:20,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-15 19:16:20,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:16:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:16:20,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:16:20,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-15 19:16:20,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264128399] [2020-10-15 19:16:20,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-15 19:16:20,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:16:20,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-15 19:16:20,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 19:16:20,703 INFO L87 Difference]: Start difference. First operand 2979 states and 3808 transitions. Second operand 63 states. [2020-10-15 19:17:46,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:17:46,602 INFO L93 Difference]: Finished difference Result 30933 states and 43155 transitions. [2020-10-15 19:17:46,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-10-15 19:17:46,603 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-15 19:17:46,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:17:46,638 INFO L225 Difference]: With dead ends: 30933 [2020-10-15 19:17:46,638 INFO L226 Difference]: Without dead ends: 30931 [2020-10-15 19:17:46,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-10-15 19:17:46,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30931 states. [2020-10-15 19:17:46,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30931 to 2985. [2020-10-15 19:17:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2985 states. [2020-10-15 19:17:46,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 3815 transitions. [2020-10-15 19:17:46,918 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 3815 transitions. Word has length 148 [2020-10-15 19:17:46,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:17:46,918 INFO L481 AbstractCegarLoop]: Abstraction has 2985 states and 3815 transitions. [2020-10-15 19:17:46,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-15 19:17:46,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 3815 transitions. [2020-10-15 19:17:46,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-15 19:17:46,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:17:46,924 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:17:47,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-15 19:17:47,136 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:17:47,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:17:47,137 INFO L82 PathProgramCache]: Analyzing trace with hash -188999425, now seen corresponding path program 37 times [2020-10-15 19:17:47,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:17:47,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366105562] [2020-10-15 19:17:47,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:17:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:17:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:17:51,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366105562] [2020-10-15 19:17:51,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232245917] [2020-10-15 19:17:51,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:17:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:17:51,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-15 19:17:51,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:17:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:17:51,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:17:51,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-15 19:17:51,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361135378] [2020-10-15 19:17:51,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-15 19:17:51,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:17:51,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-15 19:17:51,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 19:17:51,413 INFO L87 Difference]: Start difference. First operand 2985 states and 3815 transitions. Second operand 63 states. [2020-10-15 19:19:24,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:19:24,207 INFO L93 Difference]: Finished difference Result 30927 states and 43146 transitions. [2020-10-15 19:19:24,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-10-15 19:19:24,209 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-15 19:19:24,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:19:24,238 INFO L225 Difference]: With dead ends: 30927 [2020-10-15 19:19:24,238 INFO L226 Difference]: Without dead ends: 30925 [2020-10-15 19:19:24,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 40.5s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-10-15 19:19:24,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30925 states. [2020-10-15 19:19:24,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30925 to 2991. [2020-10-15 19:19:24,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2991 states. [2020-10-15 19:19:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 3822 transitions. [2020-10-15 19:19:24,416 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 3822 transitions. Word has length 148 [2020-10-15 19:19:24,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:19:24,417 INFO L481 AbstractCegarLoop]: Abstraction has 2991 states and 3822 transitions. [2020-10-15 19:19:24,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-15 19:19:24,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 3822 transitions. [2020-10-15 19:19:24,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-15 19:19:24,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:19:24,422 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:19:24,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 19:19:24,635 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:19:24,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:19:24,636 INFO L82 PathProgramCache]: Analyzing trace with hash 48993005, now seen corresponding path program 38 times [2020-10-15 19:19:24,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:19:24,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610167955] [2020-10-15 19:19:24,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:19:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:19:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:19:29,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610167955] [2020-10-15 19:19:29,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67954491] [2020-10-15 19:19:29,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:19:29,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:19:29,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:19:29,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-15 19:19:29,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:19:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:19:29,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:19:29,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-15 19:19:29,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686116730] [2020-10-15 19:19:29,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-15 19:19:29,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:19:29,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-15 19:19:29,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 19:19:29,478 INFO L87 Difference]: Start difference. First operand 2991 states and 3822 transitions. Second operand 63 states. [2020-10-15 19:21:14,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:21:14,260 INFO L93 Difference]: Finished difference Result 30921 states and 43137 transitions. [2020-10-15 19:21:14,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-10-15 19:21:14,262 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-15 19:21:14,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:21:14,290 INFO L225 Difference]: With dead ends: 30921 [2020-10-15 19:21:14,290 INFO L226 Difference]: Without dead ends: 30919 [2020-10-15 19:21:14,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 44.7s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-10-15 19:21:14,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30919 states. [2020-10-15 19:21:14,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30919 to 2997. [2020-10-15 19:21:14,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2997 states. [2020-10-15 19:21:14,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 3829 transitions. [2020-10-15 19:21:14,434 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 3829 transitions. Word has length 148 [2020-10-15 19:21:14,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:21:14,434 INFO L481 AbstractCegarLoop]: Abstraction has 2997 states and 3829 transitions. [2020-10-15 19:21:14,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-15 19:21:14,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 3829 transitions. [2020-10-15 19:21:14,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-15 19:21:14,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:21:14,439 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:21:14,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 19:21:14,652 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:21:14,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:21:14,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1924796351, now seen corresponding path program 39 times [2020-10-15 19:21:14,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:21:14,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548796567] [2020-10-15 19:21:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:21:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:21:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:21:19,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548796567] [2020-10-15 19:21:19,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739118930] [2020-10-15 19:21:19,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:21:20,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-10-15 19:21:20,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:21:20,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-15 19:21:20,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:21:20,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:21:20,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:21:20,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-15 19:21:20,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722493902] [2020-10-15 19:21:20,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-15 19:21:20,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:21:20,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-15 19:21:20,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 19:21:20,469 INFO L87 Difference]: Start difference. First operand 2997 states and 3829 transitions. Second operand 63 states. [2020-10-15 19:22:40,354 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-10-15 19:23:20,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:23:20,480 INFO L93 Difference]: Finished difference Result 30915 states and 43128 transitions. [2020-10-15 19:23:20,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-10-15 19:23:20,482 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-15 19:23:20,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:23:20,503 INFO L225 Difference]: With dead ends: 30915 [2020-10-15 19:23:20,503 INFO L226 Difference]: Without dead ends: 30913 [2020-10-15 19:23:20,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 49.5s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-10-15 19:23:20,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30913 states. [2020-10-15 19:23:20,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30913 to 3003. [2020-10-15 19:23:20,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3003 states. [2020-10-15 19:23:20,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 3836 transitions. [2020-10-15 19:23:20,620 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 3836 transitions. Word has length 148 [2020-10-15 19:23:20,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:23:20,620 INFO L481 AbstractCegarLoop]: Abstraction has 3003 states and 3836 transitions. [2020-10-15 19:23:20,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-15 19:23:20,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 3836 transitions. [2020-10-15 19:23:20,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-15 19:23:20,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:23:20,624 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:23:20,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:23:20,825 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:23:20,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:23:20,825 INFO L82 PathProgramCache]: Analyzing trace with hash -791735251, now seen corresponding path program 40 times [2020-10-15 19:23:20,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:23:20,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529829732] [2020-10-15 19:23:20,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:23:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:23:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:23:26,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529829732] [2020-10-15 19:23:26,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869851249] [2020-10-15 19:23:26,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:23:28,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:23:28,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:23:28,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-15 19:23:28,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:23:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:23:28,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:23:28,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-15 19:23:28,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787053756] [2020-10-15 19:23:28,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-15 19:23:28,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:23:28,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-15 19:23:28,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 19:23:28,584 INFO L87 Difference]: Start difference. First operand 3003 states and 3836 transitions. Second operand 63 states. Received shutdown request... [2020-10-15 19:23:52,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-10-15 19:23:52,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:23:52,744 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-15 19:23:52,748 WARN L235 ceAbstractionStarter]: Timeout [2020-10-15 19:23:52,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:23:52 BasicIcfg [2020-10-15 19:23:52,748 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 19:23:52,750 INFO L168 Benchmark]: Toolchain (without parser) took 770667.59 ms. Allocated memory was 249.6 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 204.7 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.1 GB. Max. memory is 14.2 GB. [2020-10-15 19:23:52,750 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 249.6 MB. Free memory is still 225.9 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 19:23:52,750 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1096.93 ms. Allocated memory was 249.6 MB in the beginning and 309.3 MB in the end (delta: 59.8 MB). Free memory was 204.7 MB in the beginning and 209.4 MB in the end (delta: -4.7 MB). Peak memory consumption was 65.4 MB. Max. memory is 14.2 GB. [2020-10-15 19:23:52,751 INFO L168 Benchmark]: Boogie Procedure Inliner took 106.54 ms. Allocated memory is still 309.3 MB. Free memory was 209.4 MB in the beginning and 206.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 19:23:52,751 INFO L168 Benchmark]: Boogie Preprocessor took 56.33 ms. Allocated memory is still 309.3 MB. Free memory was 206.9 MB in the beginning and 204.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 19:23:52,751 INFO L168 Benchmark]: RCFGBuilder took 451.89 ms. Allocated memory is still 309.3 MB. Free memory was 204.3 MB in the beginning and 180.0 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 14.2 GB. [2020-10-15 19:23:52,752 INFO L168 Benchmark]: TraceAbstraction took 768950.38 ms. Allocated memory was 309.3 MB in the beginning and 1.4 GB in the end (delta: 1.1 GB). Free memory was 180.0 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 996.0 MB. Max. memory is 14.2 GB. [2020-10-15 19:23:52,753 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 249.6 MB. Free memory is still 225.9 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 1096.93 ms. Allocated memory was 249.6 MB in the beginning and 309.3 MB in the end (delta: 59.8 MB). Free memory was 204.7 MB in the beginning and 209.4 MB in the end (delta: -4.7 MB). Peak memory consumption was 65.4 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 106.54 ms. Allocated memory is still 309.3 MB. Free memory was 209.4 MB in the beginning and 206.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 56.33 ms. Allocated memory is still 309.3 MB. Free memory was 206.9 MB in the beginning and 204.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 451.89 ms. Allocated memory is still 309.3 MB. Free memory was 204.3 MB in the beginning and 180.0 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 768950.38 ms. Allocated memory was 309.3 MB in the beginning and 1.4 GB in the end (delta: 1.1 GB). Free memory was 180.0 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 996.0 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 424 VarBasedMoverChecksPositive, 20 VarBasedMoverChecksNegative, 4 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 36 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.9s, 78 PlacesBefore, 19 PlacesAfterwards, 81 TransitionsBefore, 17 TransitionsAfterwards, 646 CoEnabledTransitionPairs, 5 FixpointIterations, 38 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 75 TotalNumberOfCompositions, 823 MoverChecksTotal - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while BasicCegarLoop was constructing difference of abstraction (3003states) and FLOYD_HOARE automaton (currently 117 states, 63 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 162 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 75 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 768.8s, OverallIterations: 42, TraceHistogramMax: 20, AutomataDifference: 697.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.0s, HoareTripleCheckerStatistics: 16718 SDtfs, 25194 SDslu, 940302 SDs, 0 SdLazy, 540572 SolverSat, 5904 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 251.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9825 GetRequests, 4353 SyntacticMatches, 16 SemanticMatches, 5455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111007 ImplicationChecksByTransitivity, 310.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3003occurred in iteration=41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.9s AutomataMinimizationTime, 41 MinimizatonAttempts, 198749 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 13.4s SatisfiabilityAnalysisTime, 40.5s InterpolantComputationTime, 7745 NumberOfCodeBlocks, 7514 NumberOfCodeBlocksAsserted, 373 NumberOfCheckSat, 7663 ConstructedInterpolants, 0 QuantifiedInterpolants, 3908851 SizeOfPredicates, 353 NumberOfNonLiveVariables, 14635 ConjunctsInSsa, 1678 ConjunctsInUnsatCore, 82 InterpolantComputations, 3 PerfectInterpolantSequences, 20421/56945 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown