/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 14:52:01,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 14:52:01,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 14:52:01,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 14:52:01,358 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 14:52:01,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 14:52:01,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 14:52:01,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 14:52:01,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 14:52:01,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 14:52:01,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 14:52:01,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 14:52:01,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 14:52:01,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 14:52:01,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 14:52:01,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 14:52:01,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 14:52:01,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 14:52:01,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 14:52:01,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 14:52:01,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 14:52:01,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 14:52:01,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 14:52:01,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 14:52:01,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-09 14:52:01,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 14:52:01,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 14:52:01,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 14:52:01,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 14:52:01,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 14:52:01,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 14:52:01,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 14:52:01,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 14:52:01,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 14:52:01,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 14:52:01,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 14:52:01,404 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-09 14:52:01,428 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 14:52:01,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 14:52:01,430 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 14:52:01,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 14:52:01,430 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 14:52:01,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 14:52:01,431 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 14:52:01,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 14:52:01,431 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 14:52:01,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 14:52:01,431 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 14:52:01,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 14:52:01,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 14:52:01,432 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 14:52:01,432 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 14:52:01,432 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 14:52:01,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 14:52:01,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 14:52:01,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 14:52:01,433 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 14:52:01,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 14:52:01,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 14:52:01,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 14:52:01,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 14:52:01,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 14:52:01,434 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 14:52:01,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 14:52:01,435 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 14:52:01,435 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 14:52:01,435 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 14:52:01,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 14:52:01,829 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 14:52:01,836 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 14:52:01,837 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 14:52:01,838 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 14:52:01,838 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-1.i [2020-10-09 14:52:01,920 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6462afabe/19b3d0d0be80453bb14adb8ee8980a44/FLAG662110fe8 [2020-10-09 14:52:02,473 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 14:52:02,474 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-1.i [2020-10-09 14:52:02,491 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6462afabe/19b3d0d0be80453bb14adb8ee8980a44/FLAG662110fe8 [2020-10-09 14:52:02,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6462afabe/19b3d0d0be80453bb14adb8ee8980a44 [2020-10-09 14:52:02,807 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 14:52:02,809 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 14:52:02,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 14:52:02,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 14:52:02,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 14:52:02,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:52:02" (1/1) ... [2020-10-09 14:52:02,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e53655d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:02, skipping insertion in model container [2020-10-09 14:52:02,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:52:02" (1/1) ... [2020-10-09 14:52:02,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 14:52:02,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 14:52:03,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:52:03,488 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 14:52:03,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:52:03,658 INFO L208 MainTranslator]: Completed translation [2020-10-09 14:52:03,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:03 WrapperNode [2020-10-09 14:52:03,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 14:52:03,660 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 14:52:03,660 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 14:52:03,660 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 14:52:03,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:03" (1/1) ... [2020-10-09 14:52:03,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:03" (1/1) ... [2020-10-09 14:52:03,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 14:52:03,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 14:52:03,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 14:52:03,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 14:52:03,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:03" (1/1) ... [2020-10-09 14:52:03,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:03" (1/1) ... [2020-10-09 14:52:03,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:03" (1/1) ... [2020-10-09 14:52:03,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:03" (1/1) ... [2020-10-09 14:52:03,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:03" (1/1) ... [2020-10-09 14:52:03,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:03" (1/1) ... [2020-10-09 14:52:03,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:03" (1/1) ... [2020-10-09 14:52:03,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 14:52:03,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 14:52:03,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 14:52:03,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 14:52:03,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 14:52:03,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-09 14:52:03,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 14:52:03,837 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2020-10-09 14:52:03,837 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2020-10-09 14:52:03,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 14:52:03,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 14:52:03,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 14:52:03,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 14:52:03,838 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2020-10-09 14:52:03,839 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2020-10-09 14:52:03,841 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 14:52:04,435 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 14:52:04,435 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-09 14:52:04,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:52:04 BoogieIcfgContainer [2020-10-09 14:52:04,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 14:52:04,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 14:52:04,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 14:52:04,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 14:52:04,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 02:52:02" (1/3) ... [2020-10-09 14:52:04,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dfdf965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:52:04, skipping insertion in model container [2020-10-09 14:52:04,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:03" (2/3) ... [2020-10-09 14:52:04,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dfdf965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:52:04, skipping insertion in model container [2020-10-09 14:52:04,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:52:04" (3/3) ... [2020-10-09 14:52:04,448 INFO L111 eAbstractionObserver]: Analyzing ICFG read_write_lock-1.i [2020-10-09 14:52:04,463 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 14:52:04,473 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 14:52:04,475 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 14:52:04,511 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,512 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,512 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,512 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,512 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,513 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,513 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,513 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,514 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,514 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,514 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,515 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,515 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,516 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,516 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,516 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,516 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,517 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,517 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,517 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,518 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,518 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,519 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,519 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,519 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,519 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,519 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,520 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,520 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,520 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,521 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,521 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,521 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,521 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,522 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,522 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,522 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,523 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,527 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,528 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,528 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,528 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,528 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,529 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,532 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,533 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,533 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,533 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,533 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,534 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,534 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,537 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,537 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,537 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,537 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,538 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,538 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,545 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,546 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,546 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,546 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,546 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,546 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,547 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:04,604 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-10-09 14:52:04,628 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 14:52:04,628 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 14:52:04,628 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 14:52:04,628 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 14:52:04,628 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 14:52:04,629 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 14:52:04,629 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 14:52:04,629 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 14:52:04,646 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 99 places, 100 transitions, 268 flow [2020-10-09 14:52:04,722 INFO L129 PetriNetUnfolder]: 19/134 cut-off events. [2020-10-09 14:52:04,723 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2020-10-09 14:52:04,732 INFO L80 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 134 events. 19/134 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 333 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 91. Up to 12 conditions per place. [2020-10-09 14:52:04,732 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 100 transitions, 268 flow [2020-10-09 14:52:04,743 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 80 transitions, 208 flow [2020-10-09 14:52:04,759 INFO L129 PetriNetUnfolder]: 1/44 cut-off events. [2020-10-09 14:52:04,759 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:52:04,760 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:52:04,761 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:52:04,762 INFO L429 AbstractCegarLoop]: === Iteration 1 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:52:04,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:52:04,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1987289861, now seen corresponding path program 1 times [2020-10-09 14:52:04,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:52:04,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450558271] [2020-10-09 14:52:04,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-09 14:52:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:52:04,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-09 14:52:04,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:52:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:04,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:52:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:04,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450558271] [2020-10-09 14:52:04,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:52:04,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-10-09 14:52:04,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354297101] [2020-10-09 14:52:05,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 14:52:05,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:52:05,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 14:52:05,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-09 14:52:05,206 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 100 [2020-10-09 14:52:05,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 208 flow. Second operand 4 states. [2020-10-09 14:52:05,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:52:05,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 100 [2020-10-09 14:52:05,212 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:52:05,612 INFO L129 PetriNetUnfolder]: 404/1704 cut-off events. [2020-10-09 14:52:05,612 INFO L130 PetriNetUnfolder]: For 424/424 co-relation queries the response was YES. [2020-10-09 14:52:05,628 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2556 conditions, 1704 events. 404/1704 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15684 event pairs, 74 based on Foata normal form. 74/1668 useless extension candidates. Maximal degree in co-relation 2032. Up to 251 conditions per place. [2020-10-09 14:52:05,644 INFO L132 encePairwiseOnDemand]: 89/100 looper letters, 19 selfloop transitions, 16 changer transitions 0/100 dead transitions. [2020-10-09 14:52:05,645 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 100 transitions, 318 flow [2020-10-09 14:52:05,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-09 14:52:05,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-09 14:52:05,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 472 transitions. [2020-10-09 14:52:05,670 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.944 [2020-10-09 14:52:05,671 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 472 transitions. [2020-10-09 14:52:05,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 472 transitions. [2020-10-09 14:52:05,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:52:05,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 472 transitions. [2020-10-09 14:52:05,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-09 14:52:05,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-09 14:52:05,694 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-09 14:52:05,698 INFO L185 Difference]: Start difference. First operand has 82 places, 80 transitions, 208 flow. Second operand 5 states and 472 transitions. [2020-10-09 14:52:05,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 100 transitions, 318 flow [2020-10-09 14:52:05,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 100 transitions, 286 flow, removed 0 selfloop flow, removed 8 redundant places. [2020-10-09 14:52:05,726 INFO L241 Difference]: Finished difference. Result has 82 places, 93 transitions, 294 flow [2020-10-09 14:52:05,730 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=82, PETRI_TRANSITIONS=93} [2020-10-09 14:52:05,731 INFO L341 CegarLoopForPetriNet]: 82 programPoint places, 0 predicate places. [2020-10-09 14:52:05,731 INFO L481 AbstractCegarLoop]: Abstraction has has 82 places, 93 transitions, 294 flow [2020-10-09 14:52:05,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 14:52:05,732 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:52:05,732 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:52:05,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 14:52:05,946 INFO L429 AbstractCegarLoop]: === Iteration 2 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:52:05,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:52:05,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1944960796, now seen corresponding path program 1 times [2020-10-09 14:52:05,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:52:05,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288274581] [2020-10-09 14:52:05,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-09 14:52:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:52:06,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 14:52:06,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:52:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:06,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:52:06,071 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-09 14:52:06,072 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:52:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:06,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288274581] [2020-10-09 14:52:06,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:52:06,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-09 14:52:06,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472957791] [2020-10-09 14:52:06,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 14:52:06,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:52:06,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 14:52:06,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-09 14:52:06,148 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 100 [2020-10-09 14:52:06,149 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 93 transitions, 294 flow. Second operand 4 states. [2020-10-09 14:52:06,149 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:52:06,149 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 100 [2020-10-09 14:52:06,150 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:52:06,595 INFO L129 PetriNetUnfolder]: 438/2261 cut-off events. [2020-10-09 14:52:06,595 INFO L130 PetriNetUnfolder]: For 237/333 co-relation queries the response was YES. [2020-10-09 14:52:06,611 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3225 conditions, 2261 events. 438/2261 cut-off events. For 237/333 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 23790 event pairs, 63 based on Foata normal form. 29/2208 useless extension candidates. Maximal degree in co-relation 1950. Up to 298 conditions per place. [2020-10-09 14:52:06,624 INFO L132 encePairwiseOnDemand]: 94/100 looper letters, 3 selfloop transitions, 4 changer transitions 0/93 dead transitions. [2020-10-09 14:52:06,625 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 93 transitions, 308 flow [2020-10-09 14:52:06,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 14:52:06,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-09 14:52:06,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 284 transitions. [2020-10-09 14:52:06,627 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9466666666666667 [2020-10-09 14:52:06,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 284 transitions. [2020-10-09 14:52:06,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 284 transitions. [2020-10-09 14:52:06,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:52:06,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 284 transitions. [2020-10-09 14:52:06,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-09 14:52:06,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-09 14:52:06,632 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-09 14:52:06,632 INFO L185 Difference]: Start difference. First operand has 82 places, 93 transitions, 294 flow. Second operand 3 states and 284 transitions. [2020-10-09 14:52:06,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 93 transitions, 308 flow [2020-10-09 14:52:06,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 93 transitions, 308 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 14:52:06,639 INFO L241 Difference]: Finished difference. Result has 85 places, 93 transitions, 310 flow [2020-10-09 14:52:06,640 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=310, PETRI_PLACES=85, PETRI_TRANSITIONS=93} [2020-10-09 14:52:06,640 INFO L341 CegarLoopForPetriNet]: 82 programPoint places, 3 predicate places. [2020-10-09 14:52:06,641 INFO L481 AbstractCegarLoop]: Abstraction has has 85 places, 93 transitions, 310 flow [2020-10-09 14:52:06,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 14:52:06,641 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:52:06,641 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:52:06,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 14:52:06,855 INFO L429 AbstractCegarLoop]: === Iteration 3 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:52:06,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:52:06,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1524858284, now seen corresponding path program 2 times [2020-10-09 14:52:06,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:52:06,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663675065] [2020-10-09 14:52:06,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-09 14:52:06,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 14:52:06,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:52:06,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 14:52:06,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:52:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:06,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:52:07,001 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 14:52:07,003 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:52:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:07,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663675065] [2020-10-09 14:52:07,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:52:07,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2020-10-09 14:52:07,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304724644] [2020-10-09 14:52:07,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 14:52:07,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:52:07,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 14:52:07,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-09 14:52:07,045 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 100 [2020-10-09 14:52:07,045 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 93 transitions, 310 flow. Second operand 5 states. [2020-10-09 14:52:07,046 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:52:07,046 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 100 [2020-10-09 14:52:07,046 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:52:07,428 INFO L129 PetriNetUnfolder]: 402/2012 cut-off events. [2020-10-09 14:52:07,428 INFO L130 PetriNetUnfolder]: For 395/448 co-relation queries the response was YES. [2020-10-09 14:52:07,446 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2962 conditions, 2012 events. 402/2012 cut-off events. For 395/448 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 20536 event pairs, 25 based on Foata normal form. 36/1984 useless extension candidates. Maximal degree in co-relation 1724. Up to 292 conditions per place. [2020-10-09 14:52:07,460 INFO L132 encePairwiseOnDemand]: 93/100 looper letters, 4 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2020-10-09 14:52:07,460 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 97 transitions, 346 flow [2020-10-09 14:52:07,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-09 14:52:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-09 14:52:07,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 379 transitions. [2020-10-09 14:52:07,468 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9475 [2020-10-09 14:52:07,468 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 379 transitions. [2020-10-09 14:52:07,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 379 transitions. [2020-10-09 14:52:07,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:52:07,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 379 transitions. [2020-10-09 14:52:07,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-09 14:52:07,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-09 14:52:07,472 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-09 14:52:07,472 INFO L185 Difference]: Start difference. First operand has 85 places, 93 transitions, 310 flow. Second operand 4 states and 379 transitions. [2020-10-09 14:52:07,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 97 transitions, 346 flow [2020-10-09 14:52:07,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 97 transitions, 332 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-09 14:52:07,487 INFO L241 Difference]: Finished difference. Result has 89 places, 97 transitions, 354 flow [2020-10-09 14:52:07,488 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=354, PETRI_PLACES=89, PETRI_TRANSITIONS=97} [2020-10-09 14:52:07,496 INFO L341 CegarLoopForPetriNet]: 82 programPoint places, 7 predicate places. [2020-10-09 14:52:07,496 INFO L481 AbstractCegarLoop]: Abstraction has has 89 places, 97 transitions, 354 flow [2020-10-09 14:52:07,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 14:52:07,497 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:52:07,499 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:52:07,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 14:52:07,724 INFO L429 AbstractCegarLoop]: === Iteration 4 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:52:07,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:52:07,725 INFO L82 PathProgramCache]: Analyzing trace with hash 233573567, now seen corresponding path program 1 times [2020-10-09 14:52:07,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:52:07,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167604040] [2020-10-09 14:52:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-09 14:52:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:52:07,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-09 14:52:07,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:52:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:07,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:52:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:07,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167604040] [2020-10-09 14:52:07,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:52:07,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-10-09 14:52:07,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688013058] [2020-10-09 14:52:07,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 14:52:07,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:52:07,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 14:52:07,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-09 14:52:07,993 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 100 [2020-10-09 14:52:07,995 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 97 transitions, 354 flow. Second operand 4 states. [2020-10-09 14:52:07,995 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:52:07,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 100 [2020-10-09 14:52:07,996 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:52:08,428 INFO L129 PetriNetUnfolder]: 512/2399 cut-off events. [2020-10-09 14:52:08,429 INFO L130 PetriNetUnfolder]: For 890/958 co-relation queries the response was YES. [2020-10-09 14:52:08,454 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3900 conditions, 2399 events. 512/2399 cut-off events. For 890/958 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 24671 event pairs, 45 based on Foata normal form. 64/2376 useless extension candidates. Maximal degree in co-relation 2541. Up to 346 conditions per place. [2020-10-09 14:52:08,464 INFO L132 encePairwiseOnDemand]: 91/100 looper letters, 24 selfloop transitions, 27 changer transitions 0/123 dead transitions. [2020-10-09 14:52:08,464 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 123 transitions, 591 flow [2020-10-09 14:52:08,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-09 14:52:08,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-09 14:52:08,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 457 transitions. [2020-10-09 14:52:08,467 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.914 [2020-10-09 14:52:08,467 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 457 transitions. [2020-10-09 14:52:08,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 457 transitions. [2020-10-09 14:52:08,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:52:08,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 457 transitions. [2020-10-09 14:52:08,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-09 14:52:08,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-09 14:52:08,471 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-09 14:52:08,471 INFO L185 Difference]: Start difference. First operand has 89 places, 97 transitions, 354 flow. Second operand 5 states and 457 transitions. [2020-10-09 14:52:08,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 123 transitions, 591 flow [2020-10-09 14:52:08,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 123 transitions, 575 flow, removed 4 selfloop flow, removed 1 redundant places. [2020-10-09 14:52:08,482 INFO L241 Difference]: Finished difference. Result has 95 places, 120 transitions, 592 flow [2020-10-09 14:52:08,483 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=592, PETRI_PLACES=95, PETRI_TRANSITIONS=120} [2020-10-09 14:52:08,483 INFO L341 CegarLoopForPetriNet]: 82 programPoint places, 13 predicate places. [2020-10-09 14:52:08,483 INFO L481 AbstractCegarLoop]: Abstraction has has 95 places, 120 transitions, 592 flow [2020-10-09 14:52:08,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 14:52:08,484 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:52:08,484 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:52:08,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 14:52:08,697 INFO L429 AbstractCegarLoop]: === Iteration 5 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:52:08,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:52:08,698 INFO L82 PathProgramCache]: Analyzing trace with hash -105486295, now seen corresponding path program 1 times [2020-10-09 14:52:08,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:52:08,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403727033] [2020-10-09 14:52:08,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-09 14:52:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:52:08,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 14:52:08,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:52:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:08,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:52:08,892 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 14:52:08,893 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:52:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:08,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403727033] [2020-10-09 14:52:08,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:52:08,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 6 [2020-10-09 14:52:08,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063390128] [2020-10-09 14:52:08,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 14:52:08,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:52:08,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 14:52:08,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-09 14:52:08,998 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 100 [2020-10-09 14:52:08,999 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 120 transitions, 592 flow. Second operand 6 states. [2020-10-09 14:52:08,999 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:52:08,999 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 100 [2020-10-09 14:52:08,999 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:52:09,181 INFO L129 PetriNetUnfolder]: 206/1107 cut-off events. [2020-10-09 14:52:09,182 INFO L130 PetriNetUnfolder]: For 733/859 co-relation queries the response was YES. [2020-10-09 14:52:09,191 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1969 conditions, 1107 events. 206/1107 cut-off events. For 733/859 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9732 event pairs, 4 based on Foata normal form. 43/1119 useless extension candidates. Maximal degree in co-relation 1263. Up to 156 conditions per place. [2020-10-09 14:52:09,193 INFO L132 encePairwiseOnDemand]: 93/100 looper letters, 0 selfloop transitions, 0 changer transitions 100/100 dead transitions. [2020-10-09 14:52:09,194 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 100 transitions, 470 flow [2020-10-09 14:52:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-09 14:52:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-09 14:52:09,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 468 transitions. [2020-10-09 14:52:09,196 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.936 [2020-10-09 14:52:09,197 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 468 transitions. [2020-10-09 14:52:09,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 468 transitions. [2020-10-09 14:52:09,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:52:09,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 468 transitions. [2020-10-09 14:52:09,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-09 14:52:09,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-09 14:52:09,200 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-09 14:52:09,201 INFO L185 Difference]: Start difference. First operand has 95 places, 120 transitions, 592 flow. Second operand 5 states and 468 transitions. [2020-10-09 14:52:09,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 100 transitions, 470 flow [2020-10-09 14:52:09,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 100 transitions, 464 flow, removed 3 selfloop flow, removed 0 redundant places. [2020-10-09 14:52:09,206 INFO L241 Difference]: Finished difference. Result has 95 places, 0 transitions, 0 flow [2020-10-09 14:52:09,207 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=95, PETRI_TRANSITIONS=0} [2020-10-09 14:52:09,207 INFO L341 CegarLoopForPetriNet]: 82 programPoint places, 13 predicate places. [2020-10-09 14:52:09,207 INFO L481 AbstractCegarLoop]: Abstraction has has 95 places, 0 transitions, 0 flow [2020-10-09 14:52:09,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 14:52:09,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 14:52:09,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 02:52:09 BasicIcfg [2020-10-09 14:52:09,432 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 14:52:09,434 INFO L168 Benchmark]: Toolchain (without parser) took 6624.50 ms. Allocated memory was 250.1 MB in the beginning and 431.0 MB in the end (delta: 180.9 MB). Free memory was 205.9 MB in the beginning and 189.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 197.4 MB. Max. memory is 14.2 GB. [2020-10-09 14:52:09,435 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 250.1 MB. Free memory was 228.1 MB in the beginning and 227.3 MB in the end (delta: 838.8 kB). Peak memory consumption was 838.8 kB. Max. memory is 14.2 GB. [2020-10-09 14:52:09,436 INFO L168 Benchmark]: CACSL2BoogieTranslator took 848.99 ms. Allocated memory was 250.1 MB in the beginning and 310.9 MB in the end (delta: 60.8 MB). Free memory was 205.9 MB in the beginning and 266.8 MB in the end (delta: -60.9 MB). Peak memory consumption was 30.3 MB. Max. memory is 14.2 GB. [2020-10-09 14:52:09,445 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.35 ms. Allocated memory is still 310.9 MB. Free memory was 266.8 MB in the beginning and 264.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 14:52:09,446 INFO L168 Benchmark]: Boogie Preprocessor took 30.31 ms. Allocated memory is still 310.9 MB. Free memory was 264.2 MB in the beginning and 262.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. [2020-10-09 14:52:09,447 INFO L168 Benchmark]: RCFGBuilder took 686.17 ms. Allocated memory is still 310.9 MB. Free memory was 262.6 MB in the beginning and 232.1 MB in the end (delta: 30.4 MB). Peak memory consumption was 30.4 MB. Max. memory is 14.2 GB. [2020-10-09 14:52:09,448 INFO L168 Benchmark]: TraceAbstraction took 4991.60 ms. Allocated memory was 310.9 MB in the beginning and 431.0 MB in the end (delta: 120.1 MB). Free memory was 232.1 MB in the beginning and 189.3 MB in the end (delta: 42.8 MB). Peak memory consumption was 162.9 MB. Max. memory is 14.2 GB. [2020-10-09 14:52:09,461 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 250.1 MB. Free memory was 228.1 MB in the beginning and 227.3 MB in the end (delta: 838.8 kB). Peak memory consumption was 838.8 kB. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 848.99 ms. Allocated memory was 250.1 MB in the beginning and 310.9 MB in the end (delta: 60.8 MB). Free memory was 205.9 MB in the beginning and 266.8 MB in the end (delta: -60.9 MB). Peak memory consumption was 30.3 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 61.35 ms. Allocated memory is still 310.9 MB. Free memory was 266.8 MB in the beginning and 264.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 30.31 ms. Allocated memory is still 310.9 MB. Free memory was 264.2 MB in the beginning and 262.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. * RCFGBuilder took 686.17 ms. Allocated memory is still 310.9 MB. Free memory was 262.6 MB in the beginning and 232.1 MB in the end (delta: 30.4 MB). Peak memory consumption was 30.4 MB. Max. memory is 14.2 GB. * TraceAbstraction took 4991.60 ms. Allocated memory was 310.9 MB in the beginning and 431.0 MB in the end (delta: 120.1 MB). Free memory was 232.1 MB in the beginning and 189.3 MB in the end (delta: 42.8 MB). Peak memory consumption was 162.9 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 700]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 68 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 4.8s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 50 SDtfs, 39 SDslu, 9 SDs, 0 SdLazy, 163 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 298 GetRequests, 279 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=592occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 153 NumberOfCodeBlocks, 153 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 296 ConstructedInterpolants, 0 QuantifiedInterpolants, 17321 SizeOfPredicates, 13 NumberOfNonLiveVariables, 506 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 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 proved your program to be correct! Received shutdown request...