/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-McrStrategy.epf -i ../../../trunk/examples/svcomp/pthread-lit/qw2004-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 15:49:38,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 15:49:38,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 15:49:38,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 15:49:38,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 15:49:38,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 15:49:38,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 15:49:38,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 15:49:38,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 15:49:38,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 15:49:38,875 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 15:49:38,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 15:49:38,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 15:49:38,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 15:49:38,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 15:49:38,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 15:49:38,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 15:49:38,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 15:49:38,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 15:49:38,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 15:49:38,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 15:49:38,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 15:49:38,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 15:49:38,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 15:49:38,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 15:49:38,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 15:49:38,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 15:49:38,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 15:49:38,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 15:49:38,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 15:49:38,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 15:49:38,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 15:49:38,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 15:49:38,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 15:49:38,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 15:49:38,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 15:49:38,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 15:49:38,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 15:49:38,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 15:49:38,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 15:49:38,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 15:49:38,901 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-McrStrategy.epf [2020-04-18 15:49:38,915 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 15:49:38,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 15:49:38,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 15:49:38,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 15:49:38,917 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 15:49:38,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 15:49:38,918 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 15:49:38,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 15:49:38,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 15:49:38,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 15:49:38,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 15:49:38,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 15:49:38,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 15:49:38,919 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 15:49:38,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 15:49:38,920 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 15:49:38,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 15:49:38,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 15:49:38,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 15:49:38,920 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 15:49:38,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 15:49:38,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 15:49:38,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 15:49:38,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 15:49:38,922 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 15:49:38,922 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 15:49:38,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 15:49:38,922 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-04-18 15:49:38,922 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 15:49:38,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 15:49:38,923 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 15:49:39,210 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 15:49:39,228 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 15:49:39,232 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 15:49:39,233 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 15:49:39,234 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 15:49:39,235 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-lit/qw2004-2.i [2020-04-18 15:49:39,299 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb8ad0c3b/2e46a1fdb7ba43449e26baacc2c09637/FLAG7739f88e1 [2020-04-18 15:49:39,901 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 15:49:39,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/qw2004-2.i [2020-04-18 15:49:39,914 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb8ad0c3b/2e46a1fdb7ba43449e26baacc2c09637/FLAG7739f88e1 [2020-04-18 15:49:40,096 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb8ad0c3b/2e46a1fdb7ba43449e26baacc2c09637 [2020-04-18 15:49:40,106 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 15:49:40,123 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 15:49:40,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 15:49:40,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 15:49:40,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 15:49:40,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:49:40" (1/1) ... [2020-04-18 15:49:40,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1df4cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:49:40, skipping insertion in model container [2020-04-18 15:49:40,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:49:40" (1/1) ... [2020-04-18 15:49:40,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 15:49:40,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 15:49:40,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 15:49:40,676 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 15:49:40,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 15:49:40,803 INFO L208 MainTranslator]: Completed translation [2020-04-18 15:49:40,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:49:40 WrapperNode [2020-04-18 15:49:40,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 15:49:40,805 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 15:49:40,805 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 15:49:40,805 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 15:49:40,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:49:40" (1/1) ... [2020-04-18 15:49:40,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:49:40" (1/1) ... [2020-04-18 15:49:40,858 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 15:49:40,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 15:49:40,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 15:49:40,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 15:49:40,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:49:40" (1/1) ... [2020-04-18 15:49:40,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:49:40" (1/1) ... [2020-04-18 15:49:40,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:49:40" (1/1) ... [2020-04-18 15:49:40,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:49:40" (1/1) ... [2020-04-18 15:49:40,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:49:40" (1/1) ... [2020-04-18 15:49:40,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:49:40" (1/1) ... [2020-04-18 15:49:40,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:49:40" (1/1) ... [2020-04-18 15:49:40,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 15:49:40,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 15:49:40,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 15:49:40,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 15:49:40,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:49:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 15:49:40,955 INFO L130 BoogieDeclarations]: Found specification of procedure BCSP_PnpStop [2020-04-18 15:49:40,955 INFO L138 BoogieDeclarations]: Found implementation of procedure BCSP_PnpStop [2020-04-18 15:49:40,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 15:49:40,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-18 15:49:40,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 15:49:40,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 15:49:40,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-18 15:49:40,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 15:49:40,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 15:49:40,958 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-18 15:49:41,416 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 15:49:41,416 INFO L295 CfgBuilder]: Removed 20 assume(true) statements. [2020-04-18 15:49:41,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 03:49:41 BoogieIcfgContainer [2020-04-18 15:49:41,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 15:49:41,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 15:49:41,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 15:49:41,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 15:49:41,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 03:49:40" (1/3) ... [2020-04-18 15:49:41,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b5a3b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 03:49:41, skipping insertion in model container [2020-04-18 15:49:41,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:49:40" (2/3) ... [2020-04-18 15:49:41,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b5a3b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 03:49:41, skipping insertion in model container [2020-04-18 15:49:41,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 03:49:41" (3/3) ... [2020-04-18 15:49:41,430 INFO L109 eAbstractionObserver]: Analyzing ICFG qw2004-2.i [2020-04-18 15:49:41,441 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 15:49:41,442 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 15:49:41,450 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 15:49:41,451 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 15:49:41,477 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,478 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,478 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,480 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,481 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,481 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,482 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,482 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,482 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,483 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_dec_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,483 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,483 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_dec_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,483 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_dec_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,484 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,484 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,484 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,485 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,485 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,485 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,486 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,486 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,486 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,487 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,487 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,487 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,488 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,488 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,489 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,489 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,490 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,498 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,498 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,499 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_dec_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,499 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,499 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,500 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,500 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,500 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,500 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,501 WARN L315 ript$VariableManager]: TermVariabe BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,502 WARN L315 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:49:41,520 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-18 15:49:41,547 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 15:49:41,547 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 15:49:41,547 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 15:49:41,548 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 15:49:41,548 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 15:49:41,549 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 15:49:41,549 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 15:49:41,549 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 15:49:41,569 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 87 transitions, 179 flow [2020-04-18 15:49:41,571 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 85 places, 87 transitions, 179 flow [2020-04-18 15:49:41,615 INFO L129 PetriNetUnfolder]: 6/86 cut-off events. [2020-04-18 15:49:41,615 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 15:49:41,622 INFO L80 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 86 events. 6/86 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 70. Up to 3 conditions per place. [2020-04-18 15:49:41,626 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 85 places, 87 transitions, 179 flow [2020-04-18 15:49:41,649 INFO L129 PetriNetUnfolder]: 6/86 cut-off events. [2020-04-18 15:49:41,650 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 15:49:41,651 INFO L80 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 86 events. 6/86 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 70. Up to 3 conditions per place. [2020-04-18 15:49:41,653 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2208 [2020-04-18 15:49:41,654 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-18 15:49:43,455 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2932 [2020-04-18 15:49:43,456 INFO L214 etLargeBlockEncoding]: Total number of compositions: 94 [2020-04-18 15:49:43,460 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 17 transitions, 39 flow [2020-04-18 15:49:43,470 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-18 15:49:43,473 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 15:49:43,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-18 15:49:43,479 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:49:43,480 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-04-18 15:49:43,480 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:49:43,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:49:43,485 INFO L82 PathProgramCache]: Analyzing trace with hash 11115006, now seen corresponding path program 1 times [2020-04-18 15:49:43,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:49:43,491 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [786995856] [2020-04-18 15:49:43,504 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:49:43,515 INFO L259 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-04-18 15:49:43,517 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2020-04-18 15:49:43,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-18 15:49:43,517 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:49:43,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:49:43,518 INFO L82 PathProgramCache]: Analyzing trace with hash 11115006, now seen corresponding path program 2 times [2020-04-18 15:49:43,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:49:43,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619729158] [2020-04-18 15:49:43,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:49:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:49:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:49:43,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619729158] [2020-04-18 15:49:43,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:49:43,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 15:49:43,778 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:49:43,779 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:49:43,780 INFO L259 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-04-18 15:49:43,780 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:49:43,790 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:49:43,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 15:49:43,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 15:49:43,797 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2020-04-18 15:49:43,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:49:43,801 INFO L93 Difference]: Finished difference Result 5 states and 4 transitions. [2020-04-18 15:49:43,801 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 4 transitions. [2020-04-18 15:49:43,802 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:49:43,803 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [786995856] [2020-04-18 15:49:43,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:49:43,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:49:43,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [786995856] [2020-04-18 15:49:43,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-18 15:49:43,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:49:43,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 15:49:43,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 15:49:43,822 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-04-18 15:49:43,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:49:43,847 INFO L93 Difference]: Finished difference Result 74 states and 151 transitions. [2020-04-18 15:49:43,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-18 15:49:43,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-04-18 15:49:43,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:49:43,883 INFO L225 Difference]: With dead ends: 74 [2020-04-18 15:49:43,883 INFO L226 Difference]: Without dead ends: 41 [2020-04-18 15:49:43,888 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 15:49:43,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-04-18 15:49:43,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2020-04-18 15:49:43,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-04-18 15:49:43,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 49 transitions. [2020-04-18 15:49:43,934 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 49 transitions. Word has length 4 [2020-04-18 15:49:43,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:49:43,935 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 49 transitions. [2020-04-18 15:49:43,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-18 15:49:43,935 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 49 transitions. [2020-04-18 15:49:43,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-04-18 15:49:43,935 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:49:43,935 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-04-18 15:49:43,936 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:49:43,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:49:43,936 INFO L82 PathProgramCache]: Analyzing trace with hash 344559159, now seen corresponding path program 1 times [2020-04-18 15:49:43,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:49:43,937 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1999334472] [2020-04-18 15:49:43,938 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:49:43,939 INFO L259 McrAutomatonBuilder]: Finished intersection with 6 states and 5 transitions. [2020-04-18 15:49:43,940 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2020-04-18 15:49:43,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-04-18 15:49:43,941 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:49:43,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:49:43,941 INFO L82 PathProgramCache]: Analyzing trace with hash 344559159, now seen corresponding path program 2 times [2020-04-18 15:49:43,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:49:43,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966411052] [2020-04-18 15:49:43,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:49:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:49:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:49:44,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966411052] [2020-04-18 15:49:44,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:49:44,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-18 15:49:44,006 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:49:44,006 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:49:44,007 INFO L259 McrAutomatonBuilder]: Finished intersection with 6 states and 5 transitions. [2020-04-18 15:49:44,007 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:49:44,010 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:49:44,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 15:49:44,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 15:49:44,011 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2020-04-18 15:49:44,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:49:44,012 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2020-04-18 15:49:44,012 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 5 transitions. [2020-04-18 15:49:44,012 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:49:44,013 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1999334472] [2020-04-18 15:49:44,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:49:44,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [1] total 1 [2020-04-18 15:49:44,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1999334472] [2020-04-18 15:49:44,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-18 15:49:44,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:49:44,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 15:49:44,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 15:49:44,015 INFO L87 Difference]: Start difference. First operand 26 states and 49 transitions. Second operand 3 states. [2020-04-18 15:49:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:49:44,020 INFO L93 Difference]: Finished difference Result 21 states and 38 transitions. [2020-04-18 15:49:44,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-18 15:49:44,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-04-18 15:49:44,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:49:44,022 INFO L225 Difference]: With dead ends: 21 [2020-04-18 15:49:44,022 INFO L226 Difference]: Without dead ends: 21 [2020-04-18 15:49:44,023 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 15:49:44,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-04-18 15:49:44,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-04-18 15:49:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-04-18 15:49:44,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 38 transitions. [2020-04-18 15:49:44,027 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 38 transitions. Word has length 5 [2020-04-18 15:49:44,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:49:44,027 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 38 transitions. [2020-04-18 15:49:44,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-18 15:49:44,028 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 38 transitions. [2020-04-18 15:49:44,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 15:49:44,028 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:49:44,028 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:49:44,029 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:49:44,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:49:44,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1030116261, now seen corresponding path program 1 times [2020-04-18 15:49:44,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:49:44,030 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1828148317] [2020-04-18 15:49:44,030 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:49:44,031 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 24 transitions. [2020-04-18 15:49:44,031 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-04-18 15:49:44,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 15:49:44,032 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:49:44,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:49:44,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1030116261, now seen corresponding path program 2 times [2020-04-18 15:49:44,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:49:44,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511280171] [2020-04-18 15:49:44,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:49:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:49:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:49:44,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511280171] [2020-04-18 15:49:44,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:49:44,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 15:49:44,111 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:49:44,112 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:49:44,114 INFO L259 McrAutomatonBuilder]: Finished intersection with 12 states and 14 transitions. [2020-04-18 15:49:44,114 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:49:44,147 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:49:44,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 15:49:44,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 15:49:44,148 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 4 states. [2020-04-18 15:49:44,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:49:44,168 INFO L93 Difference]: Finished difference Result 17 states and 24 transitions. [2020-04-18 15:49:44,169 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2020-04-18 15:49:44,169 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:49:44,170 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1828148317] [2020-04-18 15:49:44,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:49:44,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 15:49:44,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1828148317] [2020-04-18 15:49:44,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-18 15:49:44,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:49:44,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 15:49:44,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 15:49:44,171 INFO L87 Difference]: Start difference. First operand 21 states and 38 transitions. Second operand 4 states. [2020-04-18 15:49:44,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:49:44,189 INFO L93 Difference]: Finished difference Result 24 states and 41 transitions. [2020-04-18 15:49:44,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-18 15:49:44,190 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-04-18 15:49:44,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:49:44,191 INFO L225 Difference]: With dead ends: 24 [2020-04-18 15:49:44,191 INFO L226 Difference]: Without dead ends: 21 [2020-04-18 15:49:44,191 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 15:49:44,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-04-18 15:49:44,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-04-18 15:49:44,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-04-18 15:49:44,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 35 transitions. [2020-04-18 15:49:44,195 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 35 transitions. Word has length 8 [2020-04-18 15:49:44,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:49:44,195 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 35 transitions. [2020-04-18 15:49:44,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-18 15:49:44,196 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 35 transitions. [2020-04-18 15:49:44,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 15:49:44,196 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:49:44,196 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:49:44,196 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:49:44,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:49:44,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1870512364, now seen corresponding path program 1 times [2020-04-18 15:49:44,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:49:44,197 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [3552899] [2020-04-18 15:49:44,198 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:49:44,198 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 29 transitions. [2020-04-18 15:49:44,199 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-04-18 15:49:44,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 15:49:44,200 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:49:44,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:49:44,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1870512364, now seen corresponding path program 2 times [2020-04-18 15:49:44,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:49:44,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86002131] [2020-04-18 15:49:44,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:49:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:49:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:49:44,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86002131] [2020-04-18 15:49:44,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:49:44,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 15:49:44,253 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:49:44,254 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:49:44,256 INFO L259 McrAutomatonBuilder]: Finished intersection with 14 states and 17 transitions. [2020-04-18 15:49:44,256 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:49:44,315 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 4 times. [2020-04-18 15:49:44,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 15:49:44,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-04-18 15:49:44,316 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 7 states. [2020-04-18 15:49:44,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:49:44,328 INFO L93 Difference]: Finished difference Result 20 states and 29 transitions. [2020-04-18 15:49:44,328 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 29 transitions. [2020-04-18 15:49:44,329 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:49:44,329 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [3552899] [2020-04-18 15:49:44,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:49:44,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:49:44,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [3552899] [2020-04-18 15:49:44,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 15:49:44,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:49:44,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 15:49:44,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-04-18 15:49:44,331 INFO L87 Difference]: Start difference. First operand 21 states and 35 transitions. Second operand 7 states. [2020-04-18 15:49:44,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:49:44,370 INFO L93 Difference]: Finished difference Result 26 states and 39 transitions. [2020-04-18 15:49:44,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-18 15:49:44,371 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-04-18 15:49:44,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:49:44,372 INFO L225 Difference]: With dead ends: 26 [2020-04-18 15:49:44,372 INFO L226 Difference]: Without dead ends: 21 [2020-04-18 15:49:44,372 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-04-18 15:49:44,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-04-18 15:49:44,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-04-18 15:49:44,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-04-18 15:49:44,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 30 transitions. [2020-04-18 15:49:44,375 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 30 transitions. Word has length 9 [2020-04-18 15:49:44,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:49:44,376 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 30 transitions. [2020-04-18 15:49:44,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 15:49:44,376 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 30 transitions. [2020-04-18 15:49:44,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 15:49:44,376 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:49:44,377 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:49:44,377 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:49:44,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:49:44,377 INFO L82 PathProgramCache]: Analyzing trace with hash -434601411, now seen corresponding path program 1 times [2020-04-18 15:49:44,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:49:44,378 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1897847769] [2020-04-18 15:49:44,393 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:49:44,393 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 40 transitions. [2020-04-18 15:49:44,394 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-04-18 15:49:44,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 15:49:44,395 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:49:44,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:49:44,395 INFO L82 PathProgramCache]: Analyzing trace with hash 404179749, now seen corresponding path program 2 times [2020-04-18 15:49:44,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:49:44,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235676810] [2020-04-18 15:49:44,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:49:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:49:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:49:44,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235676810] [2020-04-18 15:49:44,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:49:44,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 15:49:44,424 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:49:44,426 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:49:44,428 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 20 transitions. [2020-04-18 15:49:44,428 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:49:44,434 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:49:44,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 15:49:44,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 15:49:44,434 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-04-18 15:49:44,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:49:44,439 INFO L93 Difference]: Finished difference Result 27 states and 40 transitions. [2020-04-18 15:49:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 40 transitions. [2020-04-18 15:49:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 15:49:44,440 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 15:49:44,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:49:44,440 INFO L82 PathProgramCache]: Analyzing trace with hash -434601411, now seen corresponding path program 3 times [2020-04-18 15:49:44,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:49:44,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730399195] [2020-04-18 15:49:44,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:49:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:49:44,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:49:44,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730399195] [2020-04-18 15:49:44,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:49:44,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 15:49:44,482 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:49:44,483 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:49:44,484 INFO L259 McrAutomatonBuilder]: Finished intersection with 12 states and 12 transitions. [2020-04-18 15:49:44,484 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:49:44,499 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:49:44,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 15:49:44,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-18 15:49:44,500 INFO L87 Difference]: Start difference. First operand 27 states and 40 transitions. Second operand 5 states. [2020-04-18 15:49:44,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:49:44,521 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2020-04-18 15:49:44,521 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2020-04-18 15:49:44,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 15:49:44,522 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 15:49:44,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:49:44,523 INFO L82 PathProgramCache]: Analyzing trace with hash -987524719, now seen corresponding path program 4 times [2020-04-18 15:49:44,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:49:44,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207980833] [2020-04-18 15:49:44,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:49:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-18 15:49:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-18 15:49:44,570 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-18 15:49:44,570 INFO L174 FreeRefinementEngine]: Strategy MCR found a feasible trace [2020-04-18 15:49:44,571 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-18 15:49:44,571 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-18 15:49:44,577 WARN L123 codingBacktranslator]: Skipped backtranslation of ATE [321] [321] L674-->BCSP_PnpStopEXIT: Formula: (and (= 0 |BCSP_PnpStopThread1of1ForFork0_#res.offset_Out-1942204127|) (= 1 ~stopped~0_Out-1942204127) (= |BCSP_PnpStopThread1of1ForFork0_#res.base_Out-1942204127| 0) (not (= BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond_Out-1942204127 0)) (= BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond_Out-1942204127 |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_#in~cond_In-1942204127|)) InVars {BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_#in~cond=|BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_#in~cond_In-1942204127|} OutVars{BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond=BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond_Out-1942204127, BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_#in~cond=|BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_#in~cond_In-1942204127|, BCSP_PnpStopThread1of1ForFork0_#res.base=|BCSP_PnpStopThread1of1ForFork0_#res.base_Out-1942204127|, ~stopped~0=~stopped~0_Out-1942204127, BCSP_PnpStopThread1of1ForFork0_#res.offset=|BCSP_PnpStopThread1of1ForFork0_#res.offset_Out-1942204127|} AuxVars[] AssignedVars[BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond, BCSP_PnpStopThread1of1ForFork0_#res.base, ~stopped~0, BCSP_PnpStopThread1of1ForFork0_#res.offset] because there is no mapped edge [2020-04-18 15:49:44,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 03:49:44 BasicIcfg [2020-04-18 15:49:44,606 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 15:49:44,609 INFO L168 Benchmark]: Toolchain (without parser) took 4500.27 ms. Allocated memory was 138.9 MB in the beginning and 249.0 MB in the end (delta: 110.1 MB). Free memory was 101.6 MB in the beginning and 193.0 MB in the end (delta: -91.4 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-04-18 15:49:44,609 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-04-18 15:49:44,610 INFO L168 Benchmark]: CACSL2BoogieTranslator took 680.04 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 99.6 MB in the beginning and 160.1 MB in the end (delta: -60.6 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2020-04-18 15:49:44,611 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.93 ms. Allocated memory is still 202.9 MB. Free memory was 160.1 MB in the beginning and 158.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-18 15:49:44,612 INFO L168 Benchmark]: Boogie Preprocessor took 27.34 ms. Allocated memory is still 202.9 MB. Free memory was 158.1 MB in the beginning and 156.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-18 15:49:44,612 INFO L168 Benchmark]: RCFGBuilder took 535.26 ms. Allocated memory is still 202.9 MB. Free memory was 156.7 MB in the beginning and 130.8 MB in the end (delta: 26.0 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. [2020-04-18 15:49:44,613 INFO L168 Benchmark]: TraceAbstraction took 3184.08 ms. Allocated memory was 202.9 MB in the beginning and 249.0 MB in the end (delta: 46.1 MB). Free memory was 130.1 MB in the beginning and 193.0 MB in the end (delta: -62.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-04-18 15:49:44,617 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 680.04 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 99.6 MB in the beginning and 160.1 MB in the end (delta: -60.6 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 52.93 ms. Allocated memory is still 202.9 MB. Free memory was 160.1 MB in the beginning and 158.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.34 ms. Allocated memory is still 202.9 MB. Free memory was 158.1 MB in the beginning and 156.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 535.26 ms. Allocated memory is still 202.9 MB. Free memory was 156.7 MB in the beginning and 130.8 MB in the end (delta: 26.0 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3184.08 ms. Allocated memory was 202.9 MB in the beginning and 249.0 MB in the end (delta: 46.1 MB). Free memory was 130.1 MB in the beginning and 193.0 MB in the end (delta: -62.9 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.8s, 85 ProgramPointsBefore, 18 ProgramPointsAfterwards, 87 TransitionsBefore, 17 TransitionsAfterwards, 2208 CoEnabledTransitionPairs, 6 FixpointIterations, 14 TrivialSequentialCompositions, 56 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 24 ConcurrentYvCompositions, 3 ChoiceCompositions, 1298 VarBasedMoverChecksPositive, 37 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 2932 CheckedPairsTotal, 94 TotalNumberOfCompositions - CounterExampleResult [Line: 679]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L686] 0 volatile int stoppingFlag; [L687] 0 volatile int pendingIo; [L688] 0 volatile int stoppingEvent; [L689] 0 volatile int stopped; [L729] 0 pthread_t t; [L730] 0 pendingIo = 1 [L731] 0 stoppingFlag = 0 [L732] 0 stoppingEvent = 0 [L733] 0 stopped = 0 [L734] FCALL, FORK 0 pthread_create(&t, 0, BCSP_PnpStop, 0) VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0] [L713] 0 int status; [L691] COND FALSE 0 !(\read(stoppingFlag)) VAL [pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0] [L722] 1 stoppingFlag = 1 [L706] 1 int pending; [L700] 1 pendingIo-- [L701] 1 int tmp = pendingIo; [L703] 1 return tmp; [L694] 0 pendingIo = pendingIo + 1 [L696] 0 return 0; [L707] 1 pending = dec() [L708] COND TRUE 1 pending == 0 [L709] 1 stoppingEvent = 1 VAL [pendingIo=1, stopped=0, stoppingEvent=1, stoppingFlag=1] [L714] 0 status = BCSP_IoIncrement() [L715] COND TRUE 0 status == 0 [L678] COND TRUE 0 !(cond) [L679] 0 __VERIFIER_error() VAL [pendingIo=1, stopped=1, stoppingEvent=1, stoppingFlag=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 82 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.0s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 61 SDtfs, 33 SDslu, 49 SDs, 0 SdLazy, 37 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 15 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 proved your program to be incorrect! Received shutdown request...