/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 20:12:59,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 20:12:59,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 20:12:59,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 20:12:59,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 20:12:59,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 20:12:59,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 20:12:59,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 20:12:59,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 20:12:59,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 20:12:59,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 20:12:59,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 20:12:59,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 20:12:59,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 20:12:59,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 20:12:59,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 20:12:59,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 20:12:59,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 20:12:59,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 20:12:59,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 20:12:59,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 20:12:59,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 20:12:59,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 20:12:59,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 20:12:59,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-11 20:12:59,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-11 20:12:59,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-11 20:12:59,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-11 20:12:59,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-11 20:12:59,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-11 20:12:59,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 20:12:59,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 20:12:59,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 20:12:59,886 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 20:12:59,887 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 20:12:59,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 20:12:59,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 20:12:59,889 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 20:12:59,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 20:12:59,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 20:12:59,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 20:12:59,893 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-11 20:12:59,935 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 20:12:59,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 20:12:59,937 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 20:12:59,937 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 20:12:59,937 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 20:12:59,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 20:12:59,938 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 20:12:59,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 20:12:59,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 20:12:59,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 20:12:59,939 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 20:12:59,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 20:12:59,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 20:12:59,940 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 20:12:59,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 20:12:59,941 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 20:12:59,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 20:12:59,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 20:12:59,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 20:12:59,941 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 20:12:59,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 20:12:59,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 20:12:59,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 20:12:59,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-11 20:12:59,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 20:12:59,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 20:12:59,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 20:12:59,943 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-11 20:12:59,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 20:13:00,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 20:13:00,440 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 20:13:00,446 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 20:13:00,448 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 20:13:00,449 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 20:13:00,451 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-09-11 20:13:00,544 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ab40116a/37e6603207aa4694b0fb5bfd5c094791/FLAG59d1d5e11 [2020-09-11 20:13:01,224 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 20:13:01,225 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-09-11 20:13:01,257 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ab40116a/37e6603207aa4694b0fb5bfd5c094791/FLAG59d1d5e11 [2020-09-11 20:13:01,431 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ab40116a/37e6603207aa4694b0fb5bfd5c094791 [2020-09-11 20:13:01,444 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 20:13:01,450 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 20:13:01,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 20:13:01,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 20:13:01,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 20:13:01,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:13:01" (1/1) ... [2020-09-11 20:13:01,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52697317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:01, skipping insertion in model container [2020-09-11 20:13:01,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:13:01" (1/1) ... [2020-09-11 20:13:01,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 20:13:01,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 20:13:02,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 20:13:02,341 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 20:13:02,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 20:13:02,658 INFO L208 MainTranslator]: Completed translation [2020-09-11 20:13:02,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:02 WrapperNode [2020-09-11 20:13:02,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 20:13:02,660 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 20:13:02,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 20:13:02,661 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 20:13:02,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:02" (1/1) ... [2020-09-11 20:13:02,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:02" (1/1) ... [2020-09-11 20:13:02,757 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 20:13:02,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 20:13:02,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 20:13:02,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 20:13:02,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:02" (1/1) ... [2020-09-11 20:13:02,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:02" (1/1) ... [2020-09-11 20:13:02,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:02" (1/1) ... [2020-09-11 20:13:02,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:02" (1/1) ... [2020-09-11 20:13:02,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:02" (1/1) ... [2020-09-11 20:13:02,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:02" (1/1) ... [2020-09-11 20:13:02,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:02" (1/1) ... [2020-09-11 20:13:02,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 20:13:02,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 20:13:02,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 20:13:02,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 20:13:02,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 20:13:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 20:13:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 20:13:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-11 20:13:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 20:13:02,873 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-09-11 20:13:02,873 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-09-11 20:13:02,873 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-09-11 20:13:02,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-11 20:13:02,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 20:13:02,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 20:13:02,877 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-11 20:13:03,361 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 20:13:03,361 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-11 20:13:03,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:13:03 BoogieIcfgContainer [2020-09-11 20:13:03,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 20:13:03,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 20:13:03,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 20:13:03,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 20:13:03,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:13:01" (1/3) ... [2020-09-11 20:13:03,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24763c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:13:03, skipping insertion in model container [2020-09-11 20:13:03,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:02" (2/3) ... [2020-09-11 20:13:03,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24763c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:13:03, skipping insertion in model container [2020-09-11 20:13:03,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:13:03" (3/3) ... [2020-09-11 20:13:03,377 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-09-11 20:13:03,390 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 20:13:03,390 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-11 20:13:03,402 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 20:13:03,403 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 20:13:03,433 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,433 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,433 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,433 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,434 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,434 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,434 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,435 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,435 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,435 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,435 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,435 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,436 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,436 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,436 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,437 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,437 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,437 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,437 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,438 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,438 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,438 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,438 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,443 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,443 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,443 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,444 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,444 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,444 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,444 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,444 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,445 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:03,476 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-11 20:13:03,505 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 20:13:03,505 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 20:13:03,505 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-11 20:13:03,506 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-11 20:13:03,506 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 20:13:03,506 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 20:13:03,506 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 20:13:03,506 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 20:13:03,526 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 81 transitions, 170 flow [2020-09-11 20:13:03,529 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-09-11 20:13:03,587 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-09-11 20:13:03,588 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-11 20:13:03,594 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. [2020-09-11 20:13:03,597 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-09-11 20:13:03,622 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-09-11 20:13:03,623 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-11 20:13:03,624 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. [2020-09-11 20:13:03,626 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 646 [2020-09-11 20:13:03,627 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-11 20:13:04,669 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-09-11 20:13:05,745 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-09-11 20:13:05,926 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-09-11 20:13:06,611 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-09-11 20:13:06,892 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-09-11 20:13:06,907 INFO L206 etLargeBlockEncoding]: Checked pairs total: 738 [2020-09-11 20:13:06,908 INFO L214 etLargeBlockEncoding]: Total number of compositions: 70 [2020-09-11 20:13:06,913 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 17 transitions, 42 flow [2020-09-11 20:13:06,925 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2020-09-11 20:13:06,927 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-09-11 20:13:06,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 20:13:06,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:06,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:06,937 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:06,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:06,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1717538151, now seen corresponding path program 1 times [2020-09-11 20:13:06,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:06,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148675558] [2020-09-11 20:13:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:13:07,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148675558] [2020-09-11 20:13:07,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 20:13:07,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 20:13:07,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101052367] [2020-09-11 20:13:07,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-11 20:13:07,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:07,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-11 20:13:07,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-11 20:13:07,262 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-09-11 20:13:07,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:07,340 INFO L93 Difference]: Finished difference Result 52 states and 100 transitions. [2020-09-11 20:13:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-11 20:13:07,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-09-11 20:13:07,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:07,361 INFO L225 Difference]: With dead ends: 52 [2020-09-11 20:13:07,361 INFO L226 Difference]: Without dead ends: 52 [2020-09-11 20:13:07,363 INFO L675 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 [2020-09-11 20:13:07,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-11 20:13:07,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-11 20:13:07,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-11 20:13:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2020-09-11 20:13:07,424 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 8 [2020-09-11 20:13:07,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:07,425 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2020-09-11 20:13:07,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-11 20:13:07,426 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2020-09-11 20:13:07,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 20:13:07,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:07,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:07,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 20:13:07,428 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:07,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:07,429 INFO L82 PathProgramCache]: Analyzing trace with hash 62706239, now seen corresponding path program 1 times [2020-09-11 20:13:07,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:07,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608907630] [2020-09-11 20:13:07,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:13:07,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608907630] [2020-09-11 20:13:07,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 20:13:07,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 20:13:07,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475045268] [2020-09-11 20:13:07,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-11 20:13:07,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:07,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-11 20:13:07,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-11 20:13:07,598 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand 3 states. [2020-09-11 20:13:07,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:07,617 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2020-09-11 20:13:07,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-11 20:13:07,618 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-11 20:13:07,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:07,619 INFO L225 Difference]: With dead ends: 64 [2020-09-11 20:13:07,620 INFO L226 Difference]: Without dead ends: 64 [2020-09-11 20:13:07,621 INFO L675 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 [2020-09-11 20:13:07,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-11 20:13:07,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2020-09-11 20:13:07,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 20:13:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2020-09-11 20:13:07,629 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 11 [2020-09-11 20:13:07,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:07,629 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2020-09-11 20:13:07,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-11 20:13:07,629 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2020-09-11 20:13:07,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 20:13:07,630 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:07,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:07,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 20:13:07,631 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:07,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:07,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1954756591, now seen corresponding path program 1 times [2020-09-11 20:13:07,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:07,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351644388] [2020-09-11 20:13:07,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:13:07,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351644388] [2020-09-11 20:13:07,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 20:13:07,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 20:13:07,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748015154] [2020-09-11 20:13:07,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-11 20:13:07,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:07,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-11 20:13:07,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-11 20:13:07,709 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand 3 states. [2020-09-11 20:13:07,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:07,728 INFO L93 Difference]: Finished difference Result 40 states and 66 transitions. [2020-09-11 20:13:07,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-11 20:13:07,729 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-09-11 20:13:07,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:07,730 INFO L225 Difference]: With dead ends: 40 [2020-09-11 20:13:07,730 INFO L226 Difference]: Without dead ends: 40 [2020-09-11 20:13:07,730 INFO L675 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 [2020-09-11 20:13:07,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-11 20:13:07,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-11 20:13:07,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-11 20:13:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 66 transitions. [2020-09-11 20:13:07,736 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 66 transitions. Word has length 15 [2020-09-11 20:13:07,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:07,736 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 66 transitions. [2020-09-11 20:13:07,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-11 20:13:07,736 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 66 transitions. [2020-09-11 20:13:07,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 20:13:07,737 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:07,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:07,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 20:13:07,738 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:07,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:07,738 INFO L82 PathProgramCache]: Analyzing trace with hash 525517821, now seen corresponding path program 2 times [2020-09-11 20:13:07,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:07,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626920731] [2020-09-11 20:13:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:13:07,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626920731] [2020-09-11 20:13:07,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366329013] [2020-09-11 20:13:07,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 20:13:07,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:13:07,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:07,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-11 20:13:07,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:13:08,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:08,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-09-11 20:13:08,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766773272] [2020-09-11 20:13:08,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 20:13:08,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:08,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 20:13:08,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-11 20:13:08,003 INFO L87 Difference]: Start difference. First operand 40 states and 66 transitions. Second operand 6 states. [2020-09-11 20:13:08,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:08,178 INFO L93 Difference]: Finished difference Result 104 states and 159 transitions. [2020-09-11 20:13:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 20:13:08,181 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-09-11 20:13:08,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:08,182 INFO L225 Difference]: With dead ends: 104 [2020-09-11 20:13:08,182 INFO L226 Difference]: Without dead ends: 104 [2020-09-11 20:13:08,183 INFO L675 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 [2020-09-11 20:13:08,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-11 20:13:08,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2020-09-11 20:13:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 20:13:08,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 124 transitions. [2020-09-11 20:13:08,204 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 124 transitions. Word has length 15 [2020-09-11 20:13:08,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:08,204 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 124 transitions. [2020-09-11 20:13:08,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 20:13:08,205 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2020-09-11 20:13:08,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 20:13:08,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:08,209 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:08,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:08,424 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:08,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:08,424 INFO L82 PathProgramCache]: Analyzing trace with hash 485096059, now seen corresponding path program 3 times [2020-09-11 20:13:08,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:08,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554454286] [2020-09-11 20:13:08,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:08,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-11 20:13:08,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554454286] [2020-09-11 20:13:08,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654830693] [2020-09-11 20:13:08,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 20:13:08,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 20:13:08,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:08,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-11 20:13:08,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-11 20:13:08,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:08,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-09-11 20:13:08,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006369692] [2020-09-11 20:13:08,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 20:13:08,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:08,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 20:13:08,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-11 20:13:08,650 INFO L87 Difference]: Start difference. First operand 79 states and 124 transitions. Second operand 8 states. [2020-09-11 20:13:08,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:08,892 INFO L93 Difference]: Finished difference Result 160 states and 236 transitions. [2020-09-11 20:13:08,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 20:13:08,896 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-09-11 20:13:08,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:08,900 INFO L225 Difference]: With dead ends: 160 [2020-09-11 20:13:08,900 INFO L226 Difference]: Without dead ends: 160 [2020-09-11 20:13:08,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-09-11 20:13:08,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-11 20:13:08,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 130. [2020-09-11 20:13:08,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-11 20:13:08,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 196 transitions. [2020-09-11 20:13:08,925 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 196 transitions. Word has length 22 [2020-09-11 20:13:08,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:08,926 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 196 transitions. [2020-09-11 20:13:08,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 20:13:08,926 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 196 transitions. [2020-09-11 20:13:08,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-11 20:13:08,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:08,930 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:09,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:09,140 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:09,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:09,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1548321815, now seen corresponding path program 4 times [2020-09-11 20:13:09,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:09,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171456269] [2020-09-11 20:13:09,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-11 20:13:09,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171456269] [2020-09-11 20:13:09,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254282885] [2020-09-11 20:13:09,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 20:13:09,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:13:09,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:09,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-11 20:13:09,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:09,390 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-11 20:13:09,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:09,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 20:13:09,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943964005] [2020-09-11 20:13:09,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 20:13:09,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:09,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 20:13:09,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-11 20:13:09,392 INFO L87 Difference]: Start difference. First operand 130 states and 196 transitions. Second operand 7 states. [2020-09-11 20:13:09,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:09,420 INFO L93 Difference]: Finished difference Result 178 states and 262 transitions. [2020-09-11 20:13:09,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-11 20:13:09,420 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-11 20:13:09,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:09,422 INFO L225 Difference]: With dead ends: 178 [2020-09-11 20:13:09,422 INFO L226 Difference]: Without dead ends: 178 [2020-09-11 20:13:09,422 INFO L675 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 [2020-09-11 20:13:09,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-09-11 20:13:09,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 160. [2020-09-11 20:13:09,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-11 20:13:09,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 238 transitions. [2020-09-11 20:13:09,435 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 238 transitions. Word has length 29 [2020-09-11 20:13:09,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:09,435 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 238 transitions. [2020-09-11 20:13:09,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 20:13:09,435 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 238 transitions. [2020-09-11 20:13:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-11 20:13:09,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:09,438 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:09,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:09,651 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:09,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:09,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2012714619, now seen corresponding path program 5 times [2020-09-11 20:13:09,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:09,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395082460] [2020-09-11 20:13:09,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-11 20:13:09,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395082460] [2020-09-11 20:13:09,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612384348] [2020-09-11 20:13:09,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 20:13:09,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 20:13:09,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:09,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-11 20:13:09,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-11 20:13:09,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:09,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 20:13:09,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549069615] [2020-09-11 20:13:09,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 20:13:09,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:09,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 20:13:09,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-11 20:13:09,902 INFO L87 Difference]: Start difference. First operand 160 states and 238 transitions. Second operand 8 states. [2020-09-11 20:13:09,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:09,946 INFO L93 Difference]: Finished difference Result 208 states and 304 transitions. [2020-09-11 20:13:09,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 20:13:09,946 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-11 20:13:09,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:09,948 INFO L225 Difference]: With dead ends: 208 [2020-09-11 20:13:09,948 INFO L226 Difference]: Without dead ends: 208 [2020-09-11 20:13:09,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-11 20:13:09,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-11 20:13:09,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 190. [2020-09-11 20:13:09,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-09-11 20:13:09,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 280 transitions. [2020-09-11 20:13:09,960 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 280 transitions. Word has length 33 [2020-09-11 20:13:09,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:09,960 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 280 transitions. [2020-09-11 20:13:09,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 20:13:09,961 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 280 transitions. [2020-09-11 20:13:09,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-11 20:13:09,962 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:09,963 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:10,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:10,179 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:10,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:10,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1171974131, now seen corresponding path program 6 times [2020-09-11 20:13:10,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:10,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334784326] [2020-09-11 20:13:10,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-11 20:13:10,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334784326] [2020-09-11 20:13:10,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983702092] [2020-09-11 20:13:10,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 20:13:10,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 20:13:10,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:10,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-11 20:13:10,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-09-11 20:13:10,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:10,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-09-11 20:13:10,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760799235] [2020-09-11 20:13:10,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 20:13:10,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:10,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 20:13:10,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-11 20:13:10,548 INFO L87 Difference]: Start difference. First operand 190 states and 280 transitions. Second operand 12 states. [2020-09-11 20:13:11,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:11,123 INFO L93 Difference]: Finished difference Result 304 states and 429 transitions. [2020-09-11 20:13:11,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 20:13:11,124 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-09-11 20:13:11,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:11,126 INFO L225 Difference]: With dead ends: 304 [2020-09-11 20:13:11,126 INFO L226 Difference]: Without dead ends: 304 [2020-09-11 20:13:11,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 20:13:11,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-11 20:13:11,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 265. [2020-09-11 20:13:11,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-09-11 20:13:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 380 transitions. [2020-09-11 20:13:11,144 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 380 transitions. Word has length 37 [2020-09-11 20:13:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:11,144 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 380 transitions. [2020-09-11 20:13:11,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 20:13:11,144 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 380 transitions. [2020-09-11 20:13:11,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-11 20:13:11,146 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:11,146 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:11,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:11,360 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:11,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:11,361 INFO L82 PathProgramCache]: Analyzing trace with hash -870694653, now seen corresponding path program 7 times [2020-09-11 20:13:11,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:11,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138364674] [2020-09-11 20:13:11,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-11 20:13:11,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138364674] [2020-09-11 20:13:11,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697740782] [2020-09-11 20:13:11,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 20:13:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:11,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 20:13:11,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-11 20:13:11,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:11,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 20:13:11,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215104363] [2020-09-11 20:13:11,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 20:13:11,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:11,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 20:13:11,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-09-11 20:13:11,637 INFO L87 Difference]: Start difference. First operand 265 states and 380 transitions. Second operand 10 states. [2020-09-11 20:13:11,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:11,694 INFO L93 Difference]: Finished difference Result 322 states and 456 transitions. [2020-09-11 20:13:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 20:13:11,694 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-09-11 20:13:11,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:11,696 INFO L225 Difference]: With dead ends: 322 [2020-09-11 20:13:11,697 INFO L226 Difference]: Without dead ends: 322 [2020-09-11 20:13:11,697 INFO L675 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 [2020-09-11 20:13:11,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-09-11 20:13:11,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 301. [2020-09-11 20:13:11,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-09-11 20:13:11,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 429 transitions. [2020-09-11 20:13:11,706 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 429 transitions. Word has length 44 [2020-09-11 20:13:11,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:11,706 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 429 transitions. [2020-09-11 20:13:11,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 20:13:11,706 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 429 transitions. [2020-09-11 20:13:11,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-11 20:13:11,708 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:11,708 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:11,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:11,924 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:11,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:11,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1422004693, now seen corresponding path program 8 times [2020-09-11 20:13:11,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:11,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28893871] [2020-09-11 20:13:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-11 20:13:12,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28893871] [2020-09-11 20:13:12,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111065605] [2020-09-11 20:13:12,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:12,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:13:12,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:12,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 20:13:12,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-11 20:13:12,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:12,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 20:13:12,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335505395] [2020-09-11 20:13:12,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 20:13:12,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:12,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 20:13:12,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-11 20:13:12,194 INFO L87 Difference]: Start difference. First operand 301 states and 429 transitions. Second operand 11 states. [2020-09-11 20:13:12,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:12,240 INFO L93 Difference]: Finished difference Result 358 states and 505 transitions. [2020-09-11 20:13:12,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 20:13:12,240 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-09-11 20:13:12,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:12,243 INFO L225 Difference]: With dead ends: 358 [2020-09-11 20:13:12,243 INFO L226 Difference]: Without dead ends: 358 [2020-09-11 20:13:12,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-11 20:13:12,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-09-11 20:13:12,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 337. [2020-09-11 20:13:12,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-09-11 20:13:12,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 478 transitions. [2020-09-11 20:13:12,253 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 478 transitions. Word has length 48 [2020-09-11 20:13:12,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:12,254 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 478 transitions. [2020-09-11 20:13:12,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 20:13:12,254 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 478 transitions. [2020-09-11 20:13:12,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-11 20:13:12,255 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:12,256 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:12,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-11 20:13:12,472 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:12,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:12,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1332663897, now seen corresponding path program 9 times [2020-09-11 20:13:12,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:12,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899493781] [2020-09-11 20:13:12,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 10 proven. 120 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-11 20:13:12,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899493781] [2020-09-11 20:13:12,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823852077] [2020-09-11 20:13:12,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:12,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 20:13:12,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:12,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-11 20:13:12,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-09-11 20:13:12,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:12,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2020-09-11 20:13:12,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072858542] [2020-09-11 20:13:12,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 20:13:12,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:12,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 20:13:12,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-09-11 20:13:12,878 INFO L87 Difference]: Start difference. First operand 337 states and 478 transitions. Second operand 16 states. [2020-09-11 20:13:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:14,288 INFO L93 Difference]: Finished difference Result 484 states and 664 transitions. [2020-09-11 20:13:14,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-11 20:13:14,289 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-09-11 20:13:14,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:14,292 INFO L225 Difference]: With dead ends: 484 [2020-09-11 20:13:14,292 INFO L226 Difference]: Without dead ends: 484 [2020-09-11 20:13:14,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1155, Invalid=2505, Unknown=0, NotChecked=0, Total=3660 [2020-09-11 20:13:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-09-11 20:13:14,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 436. [2020-09-11 20:13:14,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-09-11 20:13:14,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 606 transitions. [2020-09-11 20:13:14,305 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 606 transitions. Word has length 52 [2020-09-11 20:13:14,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:14,305 INFO L479 AbstractCegarLoop]: Abstraction has 436 states and 606 transitions. [2020-09-11 20:13:14,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 20:13:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 606 transitions. [2020-09-11 20:13:14,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-11 20:13:14,306 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:14,307 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:14,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-11 20:13:14,508 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:14,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:14,509 INFO L82 PathProgramCache]: Analyzing trace with hash 298647787, now seen corresponding path program 10 times [2020-09-11 20:13:14,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:14,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610058453] [2020-09-11 20:13:14,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 13 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-11 20:13:14,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610058453] [2020-09-11 20:13:14,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934993364] [2020-09-11 20:13:14,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:14,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:13:14,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:14,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 20:13:14,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 13 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-11 20:13:14,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:14,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 20:13:14,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717125413] [2020-09-11 20:13:14,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 20:13:14,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:14,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 20:13:14,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-11 20:13:14,930 INFO L87 Difference]: Start difference. First operand 436 states and 606 transitions. Second operand 13 states. [2020-09-11 20:13:14,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:14,995 INFO L93 Difference]: Finished difference Result 502 states and 692 transitions. [2020-09-11 20:13:15,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 20:13:15,000 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-09-11 20:13:15,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:15,003 INFO L225 Difference]: With dead ends: 502 [2020-09-11 20:13:15,004 INFO L226 Difference]: Without dead ends: 502 [2020-09-11 20:13:15,004 INFO L675 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 [2020-09-11 20:13:15,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-09-11 20:13:15,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 478. [2020-09-11 20:13:15,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-09-11 20:13:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 662 transitions. [2020-09-11 20:13:15,016 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 662 transitions. Word has length 59 [2020-09-11 20:13:15,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:15,016 INFO L479 AbstractCegarLoop]: Abstraction has 478 states and 662 transitions. [2020-09-11 20:13:15,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 20:13:15,017 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 662 transitions. [2020-09-11 20:13:15,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-11 20:13:15,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:15,018 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:15,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:15,233 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:15,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:15,233 INFO L82 PathProgramCache]: Analyzing trace with hash -734842407, now seen corresponding path program 11 times [2020-09-11 20:13:15,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:15,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260952407] [2020-09-11 20:13:15,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 13 proven. 190 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-11 20:13:15,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260952407] [2020-09-11 20:13:15,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696944884] [2020-09-11 20:13:15,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:15,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-11 20:13:15,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:15,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 20:13:15,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 13 proven. 190 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-11 20:13:15,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:15,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 20:13:15,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302935529] [2020-09-11 20:13:15,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 20:13:15,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:15,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 20:13:15,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-11 20:13:15,622 INFO L87 Difference]: Start difference. First operand 478 states and 662 transitions. Second operand 14 states. [2020-09-11 20:13:15,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:15,685 INFO L93 Difference]: Finished difference Result 544 states and 748 transitions. [2020-09-11 20:13:15,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 20:13:15,686 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-09-11 20:13:15,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:15,689 INFO L225 Difference]: With dead ends: 544 [2020-09-11 20:13:15,689 INFO L226 Difference]: Without dead ends: 544 [2020-09-11 20:13:15,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-11 20:13:15,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2020-09-11 20:13:15,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 520. [2020-09-11 20:13:15,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-09-11 20:13:15,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 718 transitions. [2020-09-11 20:13:15,701 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 718 transitions. Word has length 63 [2020-09-11 20:13:15,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:15,702 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 718 transitions. [2020-09-11 20:13:15,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 20:13:15,702 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 718 transitions. [2020-09-11 20:13:15,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-11 20:13:15,703 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:15,704 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:15,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:15,918 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:15,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:15,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1524941881, now seen corresponding path program 12 times [2020-09-11 20:13:15,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:15,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605034051] [2020-09-11 20:13:15,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 13 proven. 231 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-11 20:13:16,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605034051] [2020-09-11 20:13:16,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355912856] [2020-09-11 20:13:16,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:16,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-11 20:13:16,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:16,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 20:13:16,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-09-11 20:13:16,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:16,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 20 [2020-09-11 20:13:16,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128401008] [2020-09-11 20:13:16,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 20:13:16,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:16,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 20:13:16,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-09-11 20:13:16,423 INFO L87 Difference]: Start difference. First operand 520 states and 718 transitions. Second operand 20 states. [2020-09-11 20:13:18,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:18,924 INFO L93 Difference]: Finished difference Result 700 states and 941 transitions. [2020-09-11 20:13:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-09-11 20:13:18,925 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-09-11 20:13:18,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:18,929 INFO L225 Difference]: With dead ends: 700 [2020-09-11 20:13:18,929 INFO L226 Difference]: Without dead ends: 700 [2020-09-11 20:13:18,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2622 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2548, Invalid=5824, Unknown=0, NotChecked=0, Total=8372 [2020-09-11 20:13:18,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2020-09-11 20:13:18,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 643. [2020-09-11 20:13:18,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-09-11 20:13:18,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 874 transitions. [2020-09-11 20:13:18,949 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 874 transitions. Word has length 67 [2020-09-11 20:13:18,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:18,949 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 874 transitions. [2020-09-11 20:13:18,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 20:13:18,949 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 874 transitions. [2020-09-11 20:13:18,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-11 20:13:18,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:18,952 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:19,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-11 20:13:19,165 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:19,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:19,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1171001041, now seen corresponding path program 13 times [2020-09-11 20:13:19,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:19,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505767666] [2020-09-11 20:13:19,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 16 proven. 276 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-11 20:13:19,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505767666] [2020-09-11 20:13:19,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429594639] [2020-09-11 20:13:19,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:19,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 20:13:19,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 16 proven. 276 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-11 20:13:19,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:19,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 20:13:19,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788322688] [2020-09-11 20:13:19,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 20:13:19,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:19,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 20:13:19,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-11 20:13:19,538 INFO L87 Difference]: Start difference. First operand 643 states and 874 transitions. Second operand 16 states. [2020-09-11 20:13:19,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:19,624 INFO L93 Difference]: Finished difference Result 718 states and 970 transitions. [2020-09-11 20:13:19,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 20:13:19,625 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 74 [2020-09-11 20:13:19,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:19,629 INFO L225 Difference]: With dead ends: 718 [2020-09-11 20:13:19,629 INFO L226 Difference]: Without dead ends: 718 [2020-09-11 20:13:19,632 INFO L675 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 [2020-09-11 20:13:19,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2020-09-11 20:13:19,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 691. [2020-09-11 20:13:19,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-09-11 20:13:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 937 transitions. [2020-09-11 20:13:19,650 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 937 transitions. Word has length 74 [2020-09-11 20:13:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:19,651 INFO L479 AbstractCegarLoop]: Abstraction has 691 states and 937 transitions. [2020-09-11 20:13:19,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 20:13:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 937 transitions. [2020-09-11 20:13:19,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-11 20:13:19,654 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:19,654 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:19,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-11 20:13:19,868 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:19,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:19,869 INFO L82 PathProgramCache]: Analyzing trace with hash 776210049, now seen corresponding path program 14 times [2020-09-11 20:13:19,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:19,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460243750] [2020-09-11 20:13:19,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 325 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-11 20:13:20,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460243750] [2020-09-11 20:13:20,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432297147] [2020-09-11 20:13:20,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:20,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:13:20,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:20,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 20:13:20,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 325 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-11 20:13:20,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:20,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 20:13:20,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625042378] [2020-09-11 20:13:20,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 20:13:20,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:20,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 20:13:20,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-11 20:13:20,404 INFO L87 Difference]: Start difference. First operand 691 states and 937 transitions. Second operand 17 states. [2020-09-11 20:13:20,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:20,504 INFO L93 Difference]: Finished difference Result 766 states and 1033 transitions. [2020-09-11 20:13:20,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 20:13:20,504 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 78 [2020-09-11 20:13:20,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:20,510 INFO L225 Difference]: With dead ends: 766 [2020-09-11 20:13:20,510 INFO L226 Difference]: Without dead ends: 766 [2020-09-11 20:13:20,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-11 20:13:20,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2020-09-11 20:13:20,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 739. [2020-09-11 20:13:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 739 states. [2020-09-11 20:13:20,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1000 transitions. [2020-09-11 20:13:20,533 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1000 transitions. Word has length 78 [2020-09-11 20:13:20,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:20,533 INFO L479 AbstractCegarLoop]: Abstraction has 739 states and 1000 transitions. [2020-09-11 20:13:20,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 20:13:20,533 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1000 transitions. [2020-09-11 20:13:20,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-11 20:13:20,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:20,537 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:20,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-11 20:13:20,752 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:20,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:20,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1187324627, now seen corresponding path program 15 times [2020-09-11 20:13:20,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:20,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577861211] [2020-09-11 20:13:20,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 16 proven. 378 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-11 20:13:21,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577861211] [2020-09-11 20:13:21,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812196866] [2020-09-11 20:13:21,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:21,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 20:13:21,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:21,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 20:13:21,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-09-11 20:13:21,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:21,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2020-09-11 20:13:21,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482361571] [2020-09-11 20:13:21,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 20:13:21,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:21,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 20:13:21,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-09-11 20:13:21,343 INFO L87 Difference]: Start difference. First operand 739 states and 1000 transitions. Second operand 24 states. [2020-09-11 20:13:25,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:25,886 INFO L93 Difference]: Finished difference Result 952 states and 1260 transitions. [2020-09-11 20:13:25,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-09-11 20:13:25,887 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-09-11 20:13:25,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:25,891 INFO L225 Difference]: With dead ends: 952 [2020-09-11 20:13:25,891 INFO L226 Difference]: Without dead ends: 952 [2020-09-11 20:13:25,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5558 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4896, Invalid=11616, Unknown=0, NotChecked=0, Total=16512 [2020-09-11 20:13:25,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2020-09-11 20:13:25,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 886. [2020-09-11 20:13:25,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2020-09-11 20:13:25,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1184 transitions. [2020-09-11 20:13:25,912 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1184 transitions. Word has length 82 [2020-09-11 20:13:25,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:25,912 INFO L479 AbstractCegarLoop]: Abstraction has 886 states and 1184 transitions. [2020-09-11 20:13:25,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 20:13:25,912 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1184 transitions. [2020-09-11 20:13:25,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-11 20:13:25,915 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:25,915 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:26,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:26,128 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:26,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:26,129 INFO L82 PathProgramCache]: Analyzing trace with hash -933866561, now seen corresponding path program 16 times [2020-09-11 20:13:26,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:26,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972802328] [2020-09-11 20:13:26,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 19 proven. 435 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-11 20:13:26,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972802328] [2020-09-11 20:13:26,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6045149] [2020-09-11 20:13:26,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:26,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:13:26,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:26,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 20:13:26,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 19 proven. 435 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-11 20:13:26,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:26,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 20:13:26,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501436374] [2020-09-11 20:13:26,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 20:13:26,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:26,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 20:13:26,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-11 20:13:26,782 INFO L87 Difference]: Start difference. First operand 886 states and 1184 transitions. Second operand 19 states. [2020-09-11 20:13:26,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:26,884 INFO L93 Difference]: Finished difference Result 970 states and 1290 transitions. [2020-09-11 20:13:26,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 20:13:26,885 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 89 [2020-09-11 20:13:26,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:26,889 INFO L225 Difference]: With dead ends: 970 [2020-09-11 20:13:26,889 INFO L226 Difference]: Without dead ends: 970 [2020-09-11 20:13:26,890 INFO L675 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 [2020-09-11 20:13:26,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-09-11 20:13:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 940. [2020-09-11 20:13:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 940 states. [2020-09-11 20:13:26,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1254 transitions. [2020-09-11 20:13:26,907 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1254 transitions. Word has length 89 [2020-09-11 20:13:26,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:26,907 INFO L479 AbstractCegarLoop]: Abstraction has 940 states and 1254 transitions. [2020-09-11 20:13:26,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 20:13:26,908 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1254 transitions. [2020-09-11 20:13:26,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-11 20:13:26,910 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:26,910 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:27,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-11 20:13:27,125 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:27,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:27,125 INFO L82 PathProgramCache]: Analyzing trace with hash -365776851, now seen corresponding path program 17 times [2020-09-11 20:13:27,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:27,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610118658] [2020-09-11 20:13:27,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 19 proven. 496 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-11 20:13:27,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610118658] [2020-09-11 20:13:27,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37494250] [2020-09-11 20:13:27,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:27,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-09-11 20:13:27,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:27,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 20:13:27,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 19 proven. 496 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-11 20:13:27,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:27,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 20:13:27,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668462836] [2020-09-11 20:13:27,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 20:13:27,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:27,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 20:13:27,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-11 20:13:27,687 INFO L87 Difference]: Start difference. First operand 940 states and 1254 transitions. Second operand 20 states. [2020-09-11 20:13:27,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:27,794 INFO L93 Difference]: Finished difference Result 1024 states and 1360 transitions. [2020-09-11 20:13:27,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 20:13:27,795 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-09-11 20:13:27,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:27,800 INFO L225 Difference]: With dead ends: 1024 [2020-09-11 20:13:27,800 INFO L226 Difference]: Without dead ends: 1024 [2020-09-11 20:13:27,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-11 20:13:27,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2020-09-11 20:13:27,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 994. [2020-09-11 20:13:27,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 994 states. [2020-09-11 20:13:27,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1324 transitions. [2020-09-11 20:13:27,819 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1324 transitions. Word has length 93 [2020-09-11 20:13:27,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:27,819 INFO L479 AbstractCegarLoop]: Abstraction has 994 states and 1324 transitions. [2020-09-11 20:13:27,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 20:13:27,820 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1324 transitions. [2020-09-11 20:13:27,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-11 20:13:27,822 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:27,823 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:28,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:28,037 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:28,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:28,038 INFO L82 PathProgramCache]: Analyzing trace with hash -728816229, now seen corresponding path program 18 times [2020-09-11 20:13:28,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:28,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882829531] [2020-09-11 20:13:28,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 19 proven. 561 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-11 20:13:28,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882829531] [2020-09-11 20:13:28,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170676876] [2020-09-11 20:13:28,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:28,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-11 20:13:28,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:28,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 20:13:28,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-09-11 20:13:29,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:29,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 28 [2020-09-11 20:13:29,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171761012] [2020-09-11 20:13:29,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-11 20:13:29,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:29,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-11 20:13:29,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-11 20:13:29,076 INFO L87 Difference]: Start difference. First operand 994 states and 1324 transitions. Second operand 28 states. [2020-09-11 20:13:36,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:36,729 INFO L93 Difference]: Finished difference Result 1240 states and 1621 transitions. [2020-09-11 20:13:36,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-09-11 20:13:36,730 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 97 [2020-09-11 20:13:36,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:36,735 INFO L225 Difference]: With dead ends: 1240 [2020-09-11 20:13:36,735 INFO L226 Difference]: Without dead ends: 1240 [2020-09-11 20:13:36,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10432 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=8550, Invalid=20862, Unknown=0, NotChecked=0, Total=29412 [2020-09-11 20:13:36,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2020-09-11 20:13:36,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1165. [2020-09-11 20:13:36,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1165 states. [2020-09-11 20:13:36,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1536 transitions. [2020-09-11 20:13:36,761 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1536 transitions. Word has length 97 [2020-09-11 20:13:36,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:36,761 INFO L479 AbstractCegarLoop]: Abstraction has 1165 states and 1536 transitions. [2020-09-11 20:13:36,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-11 20:13:36,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1536 transitions. [2020-09-11 20:13:36,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-11 20:13:36,765 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:36,765 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:36,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:36,979 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:36,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:36,980 INFO L82 PathProgramCache]: Analyzing trace with hash 110062427, now seen corresponding path program 19 times [2020-09-11 20:13:36,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:36,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808932290] [2020-09-11 20:13:36,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-11 20:13:37,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808932290] [2020-09-11 20:13:37,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369580960] [2020-09-11 20:13:37,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:37,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 20:13:37,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-11 20:13:37,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:37,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 20:13:37,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951815314] [2020-09-11 20:13:37,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 20:13:37,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:37,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 20:13:37,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-11 20:13:37,590 INFO L87 Difference]: Start difference. First operand 1165 states and 1536 transitions. Second operand 22 states. [2020-09-11 20:13:37,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:37,722 INFO L93 Difference]: Finished difference Result 1258 states and 1652 transitions. [2020-09-11 20:13:37,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 20:13:37,723 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 104 [2020-09-11 20:13:37,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:37,730 INFO L225 Difference]: With dead ends: 1258 [2020-09-11 20:13:37,730 INFO L226 Difference]: Without dead ends: 1258 [2020-09-11 20:13:37,731 INFO L675 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 [2020-09-11 20:13:37,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2020-09-11 20:13:37,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1225. [2020-09-11 20:13:37,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1225 states. [2020-09-11 20:13:37,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1613 transitions. [2020-09-11 20:13:37,756 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1613 transitions. Word has length 104 [2020-09-11 20:13:37,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:37,757 INFO L479 AbstractCegarLoop]: Abstraction has 1225 states and 1613 transitions. [2020-09-11 20:13:37,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 20:13:37,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1613 transitions. [2020-09-11 20:13:37,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-09-11 20:13:37,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:37,761 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:37,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-11 20:13:37,976 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:37,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:37,977 INFO L82 PathProgramCache]: Analyzing trace with hash -912464595, now seen corresponding path program 20 times [2020-09-11 20:13:37,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:37,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110125415] [2020-09-11 20:13:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 22 proven. 703 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-11 20:13:38,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110125415] [2020-09-11 20:13:38,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594546600] [2020-09-11 20:13:38,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:38,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:13:38,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:38,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 20:13:38,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 22 proven. 703 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-11 20:13:38,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:38,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-11 20:13:38,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383217778] [2020-09-11 20:13:38,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 20:13:38,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:38,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 20:13:38,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-11 20:13:38,804 INFO L87 Difference]: Start difference. First operand 1225 states and 1613 transitions. Second operand 23 states. [2020-09-11 20:13:38,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:38,930 INFO L93 Difference]: Finished difference Result 1285 states and 1690 transitions. [2020-09-11 20:13:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 20:13:38,931 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 108 [2020-09-11 20:13:38,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:38,938 INFO L225 Difference]: With dead ends: 1285 [2020-09-11 20:13:38,939 INFO L226 Difference]: Without dead ends: 1285 [2020-09-11 20:13:38,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-11 20:13:38,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2020-09-11 20:13:38,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1285. [2020-09-11 20:13:38,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1285 states. [2020-09-11 20:13:38,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1690 transitions. [2020-09-11 20:13:38,969 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1690 transitions. Word has length 108 [2020-09-11 20:13:38,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:38,970 INFO L479 AbstractCegarLoop]: Abstraction has 1285 states and 1690 transitions. [2020-09-11 20:13:38,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 20:13:38,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1690 transitions. [2020-09-11 20:13:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-11 20:13:38,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:38,975 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:39,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:39,190 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:39,191 INFO L82 PathProgramCache]: Analyzing trace with hash -220912129, now seen corresponding path program 21 times [2020-09-11 20:13:39,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:39,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307852628] [2020-09-11 20:13:39,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:39,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307852628] [2020-09-11 20:13:39,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596578316] [2020-09-11 20:13:39,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:39,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 20:13:39,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:39,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 20:13:39,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:39,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:39,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 20:13:39,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179620597] [2020-09-11 20:13:39,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 20:13:39,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:39,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 20:13:39,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-11 20:13:39,782 INFO L87 Difference]: Start difference. First operand 1285 states and 1690 transitions. Second operand 12 states. [2020-09-11 20:13:39,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:39,840 INFO L93 Difference]: Finished difference Result 1460 states and 1896 transitions. [2020-09-11 20:13:39,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 20:13:39,841 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 112 [2020-09-11 20:13:39,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:39,846 INFO L225 Difference]: With dead ends: 1460 [2020-09-11 20:13:39,847 INFO L226 Difference]: Without dead ends: 1460 [2020-09-11 20:13:39,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-11 20:13:39,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-09-11 20:13:39,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1414. [2020-09-11 20:13:39,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1414 states. [2020-09-11 20:13:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1846 transitions. [2020-09-11 20:13:39,870 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1846 transitions. Word has length 112 [2020-09-11 20:13:39,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:39,870 INFO L479 AbstractCegarLoop]: Abstraction has 1414 states and 1846 transitions. [2020-09-11 20:13:39,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 20:13:39,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1846 transitions. [2020-09-11 20:13:39,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-11 20:13:39,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:39,875 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:40,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-11 20:13:40,089 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:40,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:40,089 INFO L82 PathProgramCache]: Analyzing trace with hash 2018487717, now seen corresponding path program 22 times [2020-09-11 20:13:40,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:40,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245719168] [2020-09-11 20:13:40,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:40,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245719168] [2020-09-11 20:13:40,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979757087] [2020-09-11 20:13:40,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:41,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:13:41,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:41,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 20:13:41,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:41,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:41,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 20:13:41,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254742081] [2020-09-11 20:13:41,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 20:13:41,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:41,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 20:13:41,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-11 20:13:41,043 INFO L87 Difference]: Start difference. First operand 1414 states and 1846 transitions. Second operand 13 states. [2020-09-11 20:13:41,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:41,132 INFO L93 Difference]: Finished difference Result 1589 states and 2052 transitions. [2020-09-11 20:13:41,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 20:13:41,132 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 115 [2020-09-11 20:13:41,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:41,139 INFO L225 Difference]: With dead ends: 1589 [2020-09-11 20:13:41,139 INFO L226 Difference]: Without dead ends: 1589 [2020-09-11 20:13:41,139 INFO L675 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 [2020-09-11 20:13:41,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2020-09-11 20:13:41,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1543. [2020-09-11 20:13:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-09-11 20:13:41,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2002 transitions. [2020-09-11 20:13:41,164 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2002 transitions. Word has length 115 [2020-09-11 20:13:41,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:41,164 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2002 transitions. [2020-09-11 20:13:41,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 20:13:41,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2002 transitions. [2020-09-11 20:13:41,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-09-11 20:13:41,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:41,169 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:41,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-11 20:13:41,384 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:41,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:41,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2042676161, now seen corresponding path program 23 times [2020-09-11 20:13:41,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:41,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548074101] [2020-09-11 20:13:41,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:41,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548074101] [2020-09-11 20:13:41,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035177180] [2020-09-11 20:13:41,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:41,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-11 20:13:41,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:41,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 20:13:41,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:41,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:41,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 20:13:41,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930439952] [2020-09-11 20:13:41,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 20:13:41,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:41,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 20:13:41,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-11 20:13:41,960 INFO L87 Difference]: Start difference. First operand 1543 states and 2002 transitions. Second operand 14 states. [2020-09-11 20:13:42,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:42,033 INFO L93 Difference]: Finished difference Result 1718 states and 2208 transitions. [2020-09-11 20:13:42,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 20:13:42,034 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 118 [2020-09-11 20:13:42,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:42,041 INFO L225 Difference]: With dead ends: 1718 [2020-09-11 20:13:42,041 INFO L226 Difference]: Without dead ends: 1718 [2020-09-11 20:13:42,041 INFO L675 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 [2020-09-11 20:13:42,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2020-09-11 20:13:42,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1672. [2020-09-11 20:13:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2020-09-11 20:13:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2158 transitions. [2020-09-11 20:13:42,067 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2158 transitions. Word has length 118 [2020-09-11 20:13:42,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:42,067 INFO L479 AbstractCegarLoop]: Abstraction has 1672 states and 2158 transitions. [2020-09-11 20:13:42,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 20:13:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2158 transitions. [2020-09-11 20:13:42,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-11 20:13:42,072 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:42,072 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:42,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:42,286 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:42,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:42,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1052962661, now seen corresponding path program 24 times [2020-09-11 20:13:42,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:42,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267033241] [2020-09-11 20:13:42,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:42,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267033241] [2020-09-11 20:13:42,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558013412] [2020-09-11 20:13:42,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:43,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-09-11 20:13:43,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:43,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 20:13:43,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:43,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:43,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 20:13:43,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495033753] [2020-09-11 20:13:43,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 20:13:43,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:43,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 20:13:43,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-09-11 20:13:43,122 INFO L87 Difference]: Start difference. First operand 1672 states and 2158 transitions. Second operand 15 states. [2020-09-11 20:13:43,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:43,231 INFO L93 Difference]: Finished difference Result 1847 states and 2364 transitions. [2020-09-11 20:13:43,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 20:13:43,231 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-09-11 20:13:43,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:43,237 INFO L225 Difference]: With dead ends: 1847 [2020-09-11 20:13:43,237 INFO L226 Difference]: Without dead ends: 1847 [2020-09-11 20:13:43,238 INFO L675 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 [2020-09-11 20:13:43,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2020-09-11 20:13:43,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1801. [2020-09-11 20:13:43,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1801 states. [2020-09-11 20:13:43,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2314 transitions. [2020-09-11 20:13:43,281 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2314 transitions. Word has length 121 [2020-09-11 20:13:43,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:43,282 INFO L479 AbstractCegarLoop]: Abstraction has 1801 states and 2314 transitions. [2020-09-11 20:13:43,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 20:13:43,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2314 transitions. [2020-09-11 20:13:43,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-11 20:13:43,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:43,287 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:43,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-11 20:13:43,500 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:43,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:43,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1691329151, now seen corresponding path program 25 times [2020-09-11 20:13:43,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:43,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302907029] [2020-09-11 20:13:43,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:43,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302907029] [2020-09-11 20:13:43,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556309267] [2020-09-11 20:13:43,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:44,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 20:13:44,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:44,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:44,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 20:13:44,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348353180] [2020-09-11 20:13:44,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 20:13:44,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:44,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 20:13:44,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-11 20:13:44,045 INFO L87 Difference]: Start difference. First operand 1801 states and 2314 transitions. Second operand 16 states. [2020-09-11 20:13:44,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:44,169 INFO L93 Difference]: Finished difference Result 1976 states and 2520 transitions. [2020-09-11 20:13:44,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 20:13:44,170 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 124 [2020-09-11 20:13:44,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:44,175 INFO L225 Difference]: With dead ends: 1976 [2020-09-11 20:13:44,175 INFO L226 Difference]: Without dead ends: 1976 [2020-09-11 20:13:44,176 INFO L675 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 [2020-09-11 20:13:44,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2020-09-11 20:13:44,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2020-09-11 20:13:44,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-09-11 20:13:44,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2470 transitions. [2020-09-11 20:13:44,198 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2470 transitions. Word has length 124 [2020-09-11 20:13:44,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:44,199 INFO L479 AbstractCegarLoop]: Abstraction has 1930 states and 2470 transitions. [2020-09-11 20:13:44,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 20:13:44,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2470 transitions. [2020-09-11 20:13:44,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-11 20:13:44,203 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:44,203 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:44,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:44,419 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:44,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:44,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1152246053, now seen corresponding path program 26 times [2020-09-11 20:13:44,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:44,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167228208] [2020-09-11 20:13:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:44,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167228208] [2020-09-11 20:13:44,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608684550] [2020-09-11 20:13:44,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:44,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:13:44,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:44,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 20:13:44,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:44,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:44,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 20:13:44,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187293118] [2020-09-11 20:13:44,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 20:13:44,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:44,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 20:13:44,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-11 20:13:44,957 INFO L87 Difference]: Start difference. First operand 1930 states and 2470 transitions. Second operand 17 states. [2020-09-11 20:13:45,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:45,035 INFO L93 Difference]: Finished difference Result 2105 states and 2676 transitions. [2020-09-11 20:13:45,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 20:13:45,036 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 127 [2020-09-11 20:13:45,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:45,044 INFO L225 Difference]: With dead ends: 2105 [2020-09-11 20:13:45,044 INFO L226 Difference]: Without dead ends: 2105 [2020-09-11 20:13:45,044 INFO L675 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 [2020-09-11 20:13:45,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2020-09-11 20:13:45,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2059. [2020-09-11 20:13:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2059 states. [2020-09-11 20:13:45,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 2626 transitions. [2020-09-11 20:13:45,071 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 2626 transitions. Word has length 127 [2020-09-11 20:13:45,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:45,071 INFO L479 AbstractCegarLoop]: Abstraction has 2059 states and 2626 transitions. [2020-09-11 20:13:45,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 20:13:45,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 2626 transitions. [2020-09-11 20:13:45,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-09-11 20:13:45,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:45,077 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:45,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-11 20:13:45,292 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:45,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:45,293 INFO L82 PathProgramCache]: Analyzing trace with hash 210393279, now seen corresponding path program 27 times [2020-09-11 20:13:45,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:45,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140340535] [2020-09-11 20:13:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:45,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140340535] [2020-09-11 20:13:45,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326384963] [2020-09-11 20:13:45,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:45,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-11 20:13:45,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:45,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 20:13:45,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:46,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:46,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 20:13:46,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396425978] [2020-09-11 20:13:46,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 20:13:46,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:46,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 20:13:46,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-11 20:13:46,039 INFO L87 Difference]: Start difference. First operand 2059 states and 2626 transitions. Second operand 18 states. [2020-09-11 20:13:46,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:46,114 INFO L93 Difference]: Finished difference Result 2234 states and 2832 transitions. [2020-09-11 20:13:46,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 20:13:46,115 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 130 [2020-09-11 20:13:46,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:46,124 INFO L225 Difference]: With dead ends: 2234 [2020-09-11 20:13:46,124 INFO L226 Difference]: Without dead ends: 2234 [2020-09-11 20:13:46,125 INFO L675 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 [2020-09-11 20:13:46,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2020-09-11 20:13:46,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2188. [2020-09-11 20:13:46,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2188 states. [2020-09-11 20:13:46,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2782 transitions. [2020-09-11 20:13:46,154 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2782 transitions. Word has length 130 [2020-09-11 20:13:46,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:46,154 INFO L479 AbstractCegarLoop]: Abstraction has 2188 states and 2782 transitions. [2020-09-11 20:13:46,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 20:13:46,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2782 transitions. [2020-09-11 20:13:46,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-11 20:13:46,160 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:46,160 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:46,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-11 20:13:46,374 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:46,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:46,374 INFO L82 PathProgramCache]: Analyzing trace with hash 495747813, now seen corresponding path program 28 times [2020-09-11 20:13:46,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:46,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110695980] [2020-09-11 20:13:46,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:46,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:46,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110695980] [2020-09-11 20:13:46,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981289684] [2020-09-11 20:13:46,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:48,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:13:48,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:48,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 20:13:48,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:48,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:48,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 20:13:48,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672476028] [2020-09-11 20:13:48,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 20:13:48,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:48,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 20:13:48,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-11 20:13:48,182 INFO L87 Difference]: Start difference. First operand 2188 states and 2782 transitions. Second operand 19 states. [2020-09-11 20:13:48,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:48,286 INFO L93 Difference]: Finished difference Result 2363 states and 2988 transitions. [2020-09-11 20:13:48,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 20:13:48,286 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 133 [2020-09-11 20:13:48,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:48,295 INFO L225 Difference]: With dead ends: 2363 [2020-09-11 20:13:48,296 INFO L226 Difference]: Without dead ends: 2363 [2020-09-11 20:13:48,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-11 20:13:48,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2020-09-11 20:13:48,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2317. [2020-09-11 20:13:48,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2020-09-11 20:13:48,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2938 transitions. [2020-09-11 20:13:48,329 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2938 transitions. Word has length 133 [2020-09-11 20:13:48,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:48,330 INFO L479 AbstractCegarLoop]: Abstraction has 2317 states and 2938 transitions. [2020-09-11 20:13:48,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 20:13:48,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2938 transitions. [2020-09-11 20:13:48,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-11 20:13:48,334 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:48,334 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:48,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:48,547 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:48,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:48,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1752391423, now seen corresponding path program 29 times [2020-09-11 20:13:48,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:48,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588454834] [2020-09-11 20:13:48,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:49,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588454834] [2020-09-11 20:13:49,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44772869] [2020-09-11 20:13:49,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:49,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-11 20:13:49,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:49,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 20:13:49,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:49,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:49,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 20:13:49,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656496007] [2020-09-11 20:13:49,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 20:13:49,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:49,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 20:13:49,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-11 20:13:49,534 INFO L87 Difference]: Start difference. First operand 2317 states and 2938 transitions. Second operand 20 states. [2020-09-11 20:13:49,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:49,641 INFO L93 Difference]: Finished difference Result 2492 states and 3144 transitions. [2020-09-11 20:13:49,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 20:13:49,642 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2020-09-11 20:13:49,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:49,646 INFO L225 Difference]: With dead ends: 2492 [2020-09-11 20:13:49,647 INFO L226 Difference]: Without dead ends: 2492 [2020-09-11 20:13:49,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-11 20:13:49,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2020-09-11 20:13:49,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2446. [2020-09-11 20:13:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2020-09-11 20:13:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3094 transitions. [2020-09-11 20:13:49,670 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3094 transitions. Word has length 136 [2020-09-11 20:13:49,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:49,671 INFO L479 AbstractCegarLoop]: Abstraction has 2446 states and 3094 transitions. [2020-09-11 20:13:49,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 20:13:49,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3094 transitions. [2020-09-11 20:13:49,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-11 20:13:49,673 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:49,674 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:49,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:49,879 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:49,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:49,880 INFO L82 PathProgramCache]: Analyzing trace with hash -807742299, now seen corresponding path program 30 times [2020-09-11 20:13:49,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:49,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179785868] [2020-09-11 20:13:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:50,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:50,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179785868] [2020-09-11 20:13:50,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948859615] [2020-09-11 20:13:50,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:50,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-09-11 20:13:50,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:50,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 20:13:50,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:51,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:51,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 20:13:51,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430927455] [2020-09-11 20:13:51,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 20:13:51,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:51,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 20:13:51,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-09-11 20:13:51,006 INFO L87 Difference]: Start difference. First operand 2446 states and 3094 transitions. Second operand 21 states. [2020-09-11 20:13:51,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:51,108 INFO L93 Difference]: Finished difference Result 2621 states and 3300 transitions. [2020-09-11 20:13:51,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 20:13:51,109 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 139 [2020-09-11 20:13:51,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:51,114 INFO L225 Difference]: With dead ends: 2621 [2020-09-11 20:13:51,114 INFO L226 Difference]: Without dead ends: 2621 [2020-09-11 20:13:51,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-09-11 20:13:51,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2020-09-11 20:13:51,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2575. [2020-09-11 20:13:51,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2575 states. [2020-09-11 20:13:51,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 3250 transitions. [2020-09-11 20:13:51,150 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 3250 transitions. Word has length 139 [2020-09-11 20:13:51,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:51,150 INFO L479 AbstractCegarLoop]: Abstraction has 2575 states and 3250 transitions. [2020-09-11 20:13:51,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 20:13:51,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 3250 transitions. [2020-09-11 20:13:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-09-11 20:13:51,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:51,156 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:51,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-11 20:13:51,370 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:51,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:51,371 INFO L82 PathProgramCache]: Analyzing trace with hash 277787967, now seen corresponding path program 31 times [2020-09-11 20:13:51,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:51,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673030641] [2020-09-11 20:13:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:51,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673030641] [2020-09-11 20:13:51,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656930220] [2020-09-11 20:13:51,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:52,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 20:13:52,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:52,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:52,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 20:13:52,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41762229] [2020-09-11 20:13:52,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 20:13:52,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:52,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 20:13:52,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-11 20:13:52,073 INFO L87 Difference]: Start difference. First operand 2575 states and 3250 transitions. Second operand 22 states. [2020-09-11 20:13:52,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:52,195 INFO L93 Difference]: Finished difference Result 2750 states and 3456 transitions. [2020-09-11 20:13:52,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 20:13:52,195 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 142 [2020-09-11 20:13:52,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:52,200 INFO L225 Difference]: With dead ends: 2750 [2020-09-11 20:13:52,200 INFO L226 Difference]: Without dead ends: 2750 [2020-09-11 20:13:52,200 INFO L675 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 [2020-09-11 20:13:52,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2020-09-11 20:13:52,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2704. [2020-09-11 20:13:52,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2704 states. [2020-09-11 20:13:52,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3406 transitions. [2020-09-11 20:13:52,224 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3406 transitions. Word has length 142 [2020-09-11 20:13:52,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:52,224 INFO L479 AbstractCegarLoop]: Abstraction has 2704 states and 3406 transitions. [2020-09-11 20:13:52,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 20:13:52,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3406 transitions. [2020-09-11 20:13:52,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-11 20:13:52,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:52,229 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:52,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:52,442 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:52,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:52,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1793796507, now seen corresponding path program 32 times [2020-09-11 20:13:52,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:52,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906293849] [2020-09-11 20:13:52,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:53,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906293849] [2020-09-11 20:13:53,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730979468] [2020-09-11 20:13:53,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:53,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:13:53,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:53,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 20:13:53,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 20:13:53,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:53,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-11 20:13:53,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076410633] [2020-09-11 20:13:53,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 20:13:53,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:53,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 20:13:53,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-11 20:13:53,344 INFO L87 Difference]: Start difference. First operand 2704 states and 3406 transitions. Second operand 23 states. [2020-09-11 20:13:53,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:53,536 INFO L93 Difference]: Finished difference Result 2833 states and 3562 transitions. [2020-09-11 20:13:53,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 20:13:53,537 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 145 [2020-09-11 20:13:53,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:53,545 INFO L225 Difference]: With dead ends: 2833 [2020-09-11 20:13:53,545 INFO L226 Difference]: Without dead ends: 2833 [2020-09-11 20:13:53,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-11 20:13:53,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2020-09-11 20:13:53,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2833. [2020-09-11 20:13:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2833 states. [2020-09-11 20:13:53,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 3562 transitions. [2020-09-11 20:13:53,594 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 3562 transitions. Word has length 145 [2020-09-11 20:13:53,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:53,595 INFO L479 AbstractCegarLoop]: Abstraction has 2833 states and 3562 transitions. [2020-09-11 20:13:53,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 20:13:53,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 3562 transitions. [2020-09-11 20:13:53,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-11 20:13:53,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:53,603 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:53,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-11 20:13:53,816 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:53,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:53,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1981785217, now seen corresponding path program 33 times [2020-09-11 20:13:53,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:53,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706124205] [2020-09-11 20:13:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:13:57,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706124205] [2020-09-11 20:13:57,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558066543] [2020-09-11 20:13:57,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:58,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-09-11 20:13:58,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:58,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-11 20:13:58,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:13:58,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:58,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-11 20:13:58,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420632733] [2020-09-11 20:13:58,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-11 20:13:58,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:58,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-11 20:13:58,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-11 20:13:58,591 INFO L87 Difference]: Start difference. First operand 2833 states and 3562 transitions. Second operand 63 states. [2020-09-11 20:15:37,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:15:37,300 INFO L93 Difference]: Finished difference Result 32926 states and 45933 transitions. [2020-09-11 20:15:37,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2020-09-11 20:15:37,301 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-11 20:15:37,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:15:37,376 INFO L225 Difference]: With dead ends: 32926 [2020-09-11 20:15:37,376 INFO L226 Difference]: Without dead ends: 32924 [2020-09-11 20:15:37,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 632 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162735 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=2407, Invalid=398915, Unknown=0, NotChecked=0, Total=401322 [2020-09-11 20:15:37,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32924 states. [2020-09-11 20:15:37,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32924 to 2967. [2020-09-11 20:15:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2967 states. [2020-09-11 20:15:37,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 3794 transitions. [2020-09-11 20:15:37,746 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 3794 transitions. Word has length 148 [2020-09-11 20:15:37,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:15:37,747 INFO L479 AbstractCegarLoop]: Abstraction has 2967 states and 3794 transitions. [2020-09-11 20:15:37,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-11 20:15:37,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 3794 transitions. [2020-09-11 20:15:37,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-11 20:15:37,753 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:15:37,753 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:15:37,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-09-11 20:15:37,968 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:15:37,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:15:37,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1970430061, now seen corresponding path program 34 times [2020-09-11 20:15:37,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:15:37,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426391477] [2020-09-11 20:15:37,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:15:38,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:15:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:15:41,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426391477] [2020-09-11 20:15:41,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477494342] [2020-09-11 20:15:41,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:15:43,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:15:43,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:15:43,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-11 20:15:43,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:15:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:15:43,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:15:43,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-11 20:15:43,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138290799] [2020-09-11 20:15:43,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-11 20:15:43,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:15:43,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-11 20:15:43,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-11 20:15:43,977 INFO L87 Difference]: Start difference. First operand 2967 states and 3794 transitions. Second operand 63 states. Received shutdown request... [2020-09-11 20:16:47,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 388 states. [2020-09-11 20:16:48,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-11 20:16:48,064 WARN L544 AbstractCegarLoop]: Verification canceled [2020-09-11 20:16:48,070 WARN L228 ceAbstractionStarter]: Timeout [2020-09-11 20:16:48,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 08:16:48 BasicIcfg [2020-09-11 20:16:48,071 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 20:16:48,074 INFO L168 Benchmark]: Toolchain (without parser) took 226627.05 ms. Allocated memory was 147.8 MB in the beginning and 1.1 GB in the end (delta: 928.5 MB). Free memory was 102.6 MB in the beginning and 432.6 MB in the end (delta: -330.1 MB). Peak memory consumption was 598.5 MB. Max. memory is 7.1 GB. [2020-09-11 20:16:48,077 INFO L168 Benchmark]: CDTParser took 0.54 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-11 20:16:48,077 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1208.39 ms. Allocated memory was 147.8 MB in the beginning and 205.5 MB in the end (delta: 57.7 MB). Free memory was 102.0 MB in the beginning and 109.5 MB in the end (delta: -7.6 MB). Peak memory consumption was 59.5 MB. Max. memory is 7.1 GB. [2020-09-11 20:16:48,077 INFO L168 Benchmark]: Boogie Procedure Inliner took 96.94 ms. Allocated memory is still 205.5 MB. Free memory was 109.5 MB in the beginning and 106.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-11 20:16:48,078 INFO L168 Benchmark]: Boogie Preprocessor took 35.74 ms. Allocated memory is still 205.5 MB. Free memory was 106.8 MB in the beginning and 105.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-11 20:16:48,078 INFO L168 Benchmark]: RCFGBuilder took 573.48 ms. Allocated memory was 205.5 MB in the beginning and 236.5 MB in the end (delta: 30.9 MB). Free memory was 105.4 MB in the beginning and 193.9 MB in the end (delta: -88.5 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2020-09-11 20:16:48,079 INFO L168 Benchmark]: TraceAbstraction took 224702.29 ms. Allocated memory was 236.5 MB in the beginning and 1.1 GB in the end (delta: 839.9 MB). Free memory was 192.5 MB in the beginning and 432.6 MB in the end (delta: -240.1 MB). Peak memory consumption was 599.8 MB. Max. memory is 7.1 GB. [2020-09-11 20:16:48,081 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1208.39 ms. Allocated memory was 147.8 MB in the beginning and 205.5 MB in the end (delta: 57.7 MB). Free memory was 102.0 MB in the beginning and 109.5 MB in the end (delta: -7.6 MB). Peak memory consumption was 59.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 96.94 ms. Allocated memory is still 205.5 MB. Free memory was 109.5 MB in the beginning and 106.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.74 ms. Allocated memory is still 205.5 MB. Free memory was 106.8 MB in the beginning and 105.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 573.48 ms. Allocated memory was 205.5 MB in the beginning and 236.5 MB in the end (delta: 30.9 MB). Free memory was 105.4 MB in the beginning and 193.9 MB in the end (delta: -88.5 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 224702.29 ms. Allocated memory was 236.5 MB in the beginning and 1.1 GB in the end (delta: 839.9 MB). Free memory was 192.5 MB in the beginning and 432.6 MB in the end (delta: -240.1 MB). Peak memory consumption was 599.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 3.3s, 78 ProgramPointsBefore, 19 ProgramPointsAfterwards, 81 TransitionsBefore, 17 TransitionsAfterwards, 646 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 317 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 738 CheckedPairsTotal, 70 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while BasicCegarLoop was constructing difference of abstraction (2967states) and FLOYD_HOARE automaton (currently 388 states, 63 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 418 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 75 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 224.5s, OverallIterations: 36, TraceHistogramMax: 20, AutomataDifference: 182.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.4s, HoareTripleCheckerStatistics: 4313 SDtfs, 11165 SDslu, 219621 SDs, 0 SdLazy, 125859 SolverSat, 2136 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 78.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5308 GetRequests, 3407 SyntacticMatches, 4 SemanticMatches, 1896 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246453 ImplicationChecksByTransitivity, 83.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2967occurred in iteration=35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 35 MinimizatonAttempts, 31106 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 9.2s SatisfiabilityAnalysisTime, 18.0s InterpolantComputationTime, 6098 NumberOfCodeBlocks, 5843 NumberOfCodeBlocksAsserted, 292 NumberOfCheckSat, 6029 ConstructedInterpolants, 0 QuantifiedInterpolants, 2179807 SizeOfPredicates, 111 NumberOfNonLiveVariables, 11271 ConjunctsInSsa, 710 ConjunctsInUnsatCore, 69 InterpolantComputations, 3 PerfectInterpolantSequences, 21389/42051 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