/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-wmm/safe019_pso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 17:48:47,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 17:48:47,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 17:48:47,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 17:48:47,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 17:48:47,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 17:48:47,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 17:48:47,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 17:48:47,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 17:48:47,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 17:48:47,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 17:48:47,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 17:48:47,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 17:48:47,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 17:48:47,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 17:48:47,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 17:48:47,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 17:48:47,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 17:48:47,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 17:48:47,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 17:48:47,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 17:48:47,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 17:48:47,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 17:48:47,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 17:48:47,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 17:48:47,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 17:48:47,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 17:48:47,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 17:48:47,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 17:48:47,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 17:48:47,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 17:48:47,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 17:48:47,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 17:48:47,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 17:48:47,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 17:48:47,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 17:48:47,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 17:48:47,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 17:48:47,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 17:48:47,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 17:48:47,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 17:48:47,440 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 17:48:47,461 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 17:48:47,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 17:48:47,463 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 17:48:47,463 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 17:48:47,463 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 17:48:47,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 17:48:47,464 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 17:48:47,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 17:48:47,464 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 17:48:47,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 17:48:47,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 17:48:47,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 17:48:47,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 17:48:47,465 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 17:48:47,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 17:48:47,466 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 17:48:47,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 17:48:47,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 17:48:47,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 17:48:47,467 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 17:48:47,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 17:48:47,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 17:48:47,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 17:48:47,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 17:48:47,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 17:48:47,468 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 17:48:47,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 17:48:47,468 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 17:48:47,468 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 17:48:47,469 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 17:48:47,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 17:48:47,799 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 17:48:47,804 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 17:48:47,806 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 17:48:47,806 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 17:48:47,807 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_pso.opt.i [2020-10-09 17:48:47,885 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/692bbb2d2/3175cfc162584fa09249a6d2626016b7/FLAG9456b5039 [2020-10-09 17:48:48,387 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 17:48:48,388 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_pso.opt.i [2020-10-09 17:48:48,405 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/692bbb2d2/3175cfc162584fa09249a6d2626016b7/FLAG9456b5039 [2020-10-09 17:48:48,697 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/692bbb2d2/3175cfc162584fa09249a6d2626016b7 [2020-10-09 17:48:48,708 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 17:48:48,710 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 17:48:48,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 17:48:48,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 17:48:48,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 17:48:48,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:48:48" (1/1) ... [2020-10-09 17:48:48,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@230290f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:48:48, skipping insertion in model container [2020-10-09 17:48:48,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:48:48" (1/1) ... [2020-10-09 17:48:48,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 17:48:48,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 17:48:49,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:48:49,386 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 17:48:49,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:48:49,574 INFO L208 MainTranslator]: Completed translation [2020-10-09 17:48:49,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:48:49 WrapperNode [2020-10-09 17:48:49,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 17:48:49,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 17:48:49,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 17:48:49,577 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 17:48:49,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:48:49" (1/1) ... [2020-10-09 17:48:49,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:48:49" (1/1) ... [2020-10-09 17:48:49,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 17:48:49,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 17:48:49,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 17:48:49,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 17:48:49,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:48:49" (1/1) ... [2020-10-09 17:48:49,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:48:49" (1/1) ... [2020-10-09 17:48:49,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:48:49" (1/1) ... [2020-10-09 17:48:49,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:48:49" (1/1) ... [2020-10-09 17:48:49,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:48:49" (1/1) ... [2020-10-09 17:48:49,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:48:49" (1/1) ... [2020-10-09 17:48:49,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:48:49" (1/1) ... [2020-10-09 17:48:49,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 17:48:49,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 17:48:49,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 17:48:49,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 17:48:49,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:48:49" (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 17:48:49,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 17:48:49,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 17:48:49,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 17:48:49,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 17:48:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-09 17:48:49,726 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-09 17:48:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-09 17:48:49,726 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-09 17:48:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-09 17:48:49,727 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-09 17:48:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2020-10-09 17:48:49,727 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2020-10-09 17:48:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 17:48:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 17:48:49,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 17:48:49,729 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 17:48:50,121 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 17:48:50,122 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-09 17:48:50,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:48:50 BoogieIcfgContainer [2020-10-09 17:48:50,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 17:48:50,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 17:48:50,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 17:48:50,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 17:48:50,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 05:48:48" (1/3) ... [2020-10-09 17:48:50,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7351bd78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:48:50, skipping insertion in model container [2020-10-09 17:48:50,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:48:49" (2/3) ... [2020-10-09 17:48:50,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7351bd78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:48:50, skipping insertion in model container [2020-10-09 17:48:50,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:48:50" (3/3) ... [2020-10-09 17:48:50,133 INFO L111 eAbstractionObserver]: Analyzing ICFG safe019_pso.opt.i [2020-10-09 17:48:50,144 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 17:48:50,152 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 17:48:50,153 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 17:48:50,181 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,181 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,182 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,182 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,182 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,183 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,183 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,183 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,183 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,184 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,184 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,184 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,185 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,185 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,185 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,185 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,186 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,186 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,186 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,186 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,187 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,187 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,187 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,187 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,191 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,191 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,191 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,192 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,200 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,200 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,201 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,201 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,203 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,204 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,204 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,204 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,206 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,207 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,207 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,207 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:48:50,225 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-10-09 17:48:50,247 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 17:48:50,248 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 17:48:50,248 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 17:48:50,248 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 17:48:50,248 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 17:48:50,248 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 17:48:50,248 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 17:48:50,249 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 17:48:50,263 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 92 places, 81 transitions, 182 flow [2020-10-09 17:48:50,311 INFO L129 PetriNetUnfolder]: 2/77 cut-off events. [2020-10-09 17:48:50,311 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:48:50,316 INFO L80 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 77 events. 2/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 59 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2020-10-09 17:48:50,317 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 81 transitions, 182 flow [2020-10-09 17:48:50,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 64 transitions, 140 flow [2020-10-09 17:48:50,345 INFO L129 PetriNetUnfolder]: 1/63 cut-off events. [2020-10-09 17:48:50,346 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:48:50,346 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:48:50,347 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] [2020-10-09 17:48:50,348 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:48:50,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:48:50,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1175723912, now seen corresponding path program 1 times [2020-10-09 17:48:50,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:48:50,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567263491] [2020-10-09 17:48:50,369 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 17:48:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:48:50,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:48:50,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:48:50,623 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:48:50,669 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 17:48:50,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:48:50,747 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 17:48:50,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567263491] [2020-10-09 17:48:50,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:48:50,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:48:50,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618033666] [2020-10-09 17:48:50,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:48:50,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:48:50,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:48:50,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:48:51,031 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 81 [2020-10-09 17:48:51,034 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 64 transitions, 140 flow. Second operand 8 states. [2020-10-09 17:48:51,034 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:48:51,034 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 81 [2020-10-09 17:48:51,036 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:48:51,223 INFO L129 PetriNetUnfolder]: 18/141 cut-off events. [2020-10-09 17:48:51,224 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:48:51,225 INFO L80 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 141 events. 18/141 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 463 event pairs, 0 based on Foata normal form. 8/146 useless extension candidates. Maximal degree in co-relation 188. Up to 15 conditions per place. [2020-10-09 17:48:51,227 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 10 selfloop transitions, 5 changer transitions 24/92 dead transitions. [2020-10-09 17:48:51,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 92 transitions, 272 flow [2020-10-09 17:48:51,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 17:48:51,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-09 17:48:51,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 954 transitions. [2020-10-09 17:48:51,251 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.905982905982906 [2020-10-09 17:48:51,252 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 954 transitions. [2020-10-09 17:48:51,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 954 transitions. [2020-10-09 17:48:51,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:48:51,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 954 transitions. [2020-10-09 17:48:51,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-09 17:48:51,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-09 17:48:51,278 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-09 17:48:51,280 INFO L185 Difference]: Start difference. First operand has 76 places, 64 transitions, 140 flow. Second operand 13 states and 954 transitions. [2020-10-09 17:48:51,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 92 transitions, 272 flow [2020-10-09 17:48:51,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 92 transitions, 268 flow, removed 0 selfloop flow, removed 4 redundant places. [2020-10-09 17:48:51,292 INFO L241 Difference]: Finished difference. Result has 95 places, 64 transitions, 174 flow [2020-10-09 17:48:51,296 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=174, PETRI_PLACES=95, PETRI_TRANSITIONS=64} [2020-10-09 17:48:51,297 INFO L341 CegarLoopForPetriNet]: 76 programPoint places, 19 predicate places. [2020-10-09 17:48:51,297 INFO L481 AbstractCegarLoop]: Abstraction has has 95 places, 64 transitions, 174 flow [2020-10-09 17:48:51,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:48:51,297 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:48:51,298 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, 1] [2020-10-09 17:48:51,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 17:48:51,511 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:48:51,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:48:51,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1181446377, now seen corresponding path program 1 times [2020-10-09 17:48:51,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:48:51,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981679353] [2020-10-09 17:48:51,514 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 17:48:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:48:51,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:48:51,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:48:51,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:48:51,642 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 17:48:51,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:48:51,689 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 17:48:51,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981679353] [2020-10-09 17:48:51,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:48:51,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:48:51,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396329383] [2020-10-09 17:48:51,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:48:51,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:48:51,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:48:51,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:48:51,817 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 81 [2020-10-09 17:48:51,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 64 transitions, 174 flow. Second operand 8 states. [2020-10-09 17:48:51,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:48:51,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 81 [2020-10-09 17:48:51,819 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:48:51,914 INFO L129 PetriNetUnfolder]: 6/114 cut-off events. [2020-10-09 17:48:51,914 INFO L130 PetriNetUnfolder]: For 81/85 co-relation queries the response was YES. [2020-10-09 17:48:51,915 INFO L80 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 114 events. 6/114 cut-off events. For 81/85 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 323 event pairs, 0 based on Foata normal form. 4/116 useless extension candidates. Maximal degree in co-relation 205. Up to 12 conditions per place. [2020-10-09 17:48:51,916 INFO L132 encePairwiseOnDemand]: 75/81 looper letters, 6 selfloop transitions, 2 changer transitions 10/74 dead transitions. [2020-10-09 17:48:51,916 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 74 transitions, 258 flow [2020-10-09 17:48:51,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:48:51,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:48:51,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 659 transitions. [2020-10-09 17:48:51,920 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9039780521262003 [2020-10-09 17:48:51,920 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 659 transitions. [2020-10-09 17:48:51,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 659 transitions. [2020-10-09 17:48:51,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:48:51,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 659 transitions. [2020-10-09 17:48:51,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:48:51,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:48:51,925 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:48:51,925 INFO L185 Difference]: Start difference. First operand has 95 places, 64 transitions, 174 flow. Second operand 9 states and 659 transitions. [2020-10-09 17:48:51,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 74 transitions, 258 flow [2020-10-09 17:48:51,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 74 transitions, 216 flow, removed 21 selfloop flow, removed 9 redundant places. [2020-10-09 17:48:51,931 INFO L241 Difference]: Finished difference. Result has 91 places, 64 transitions, 176 flow [2020-10-09 17:48:51,931 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=176, PETRI_PLACES=91, PETRI_TRANSITIONS=64} [2020-10-09 17:48:51,932 INFO L341 CegarLoopForPetriNet]: 76 programPoint places, 15 predicate places. [2020-10-09 17:48:51,932 INFO L481 AbstractCegarLoop]: Abstraction has has 91 places, 64 transitions, 176 flow [2020-10-09 17:48:51,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:48:51,932 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:48:51,932 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, 1, 1, 1] [2020-10-09 17:48:52,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 17:48:52,144 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:48:52,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:48:52,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1785258026, now seen corresponding path program 1 times [2020-10-09 17:48:52,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:48:52,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337021646] [2020-10-09 17:48:52,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 17:48:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:48:52,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:48:52,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:48:52,228 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:48:52,251 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 17:48:52,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:48:52,297 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 17:48:52,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337021646] [2020-10-09 17:48:52,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:48:52,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:48:52,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61838279] [2020-10-09 17:48:52,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:48:52,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:48:52,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:48:52,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:48:52,413 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 81 [2020-10-09 17:48:52,413 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 64 transitions, 176 flow. Second operand 8 states. [2020-10-09 17:48:52,413 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:48:52,414 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 81 [2020-10-09 17:48:52,414 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:48:52,507 INFO L129 PetriNetUnfolder]: 3/95 cut-off events. [2020-10-09 17:48:52,507 INFO L130 PetriNetUnfolder]: For 40/44 co-relation queries the response was YES. [2020-10-09 17:48:52,508 INFO L80 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 95 events. 3/95 cut-off events. For 40/44 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 212 event pairs, 0 based on Foata normal form. 2/96 useless extension candidates. Maximal degree in co-relation 159. Up to 12 conditions per place. [2020-10-09 17:48:52,509 INFO L132 encePairwiseOnDemand]: 75/81 looper letters, 6 selfloop transitions, 2 changer transitions 10/74 dead transitions. [2020-10-09 17:48:52,509 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 74 transitions, 254 flow [2020-10-09 17:48:52,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:48:52,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:48:52,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 659 transitions. [2020-10-09 17:48:52,515 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9039780521262003 [2020-10-09 17:48:52,515 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 659 transitions. [2020-10-09 17:48:52,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 659 transitions. [2020-10-09 17:48:52,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:48:52,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 659 transitions. [2020-10-09 17:48:52,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:48:52,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:48:52,520 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:48:52,520 INFO L185 Difference]: Start difference. First operand has 91 places, 64 transitions, 176 flow. Second operand 9 states and 659 transitions. [2020-10-09 17:48:52,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 74 transitions, 254 flow [2020-10-09 17:48:52,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 74 transitions, 222 flow, removed 14 selfloop flow, removed 8 redundant places. [2020-10-09 17:48:52,527 INFO L241 Difference]: Finished difference. Result has 92 places, 64 transitions, 180 flow [2020-10-09 17:48:52,528 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=180, PETRI_PLACES=92, PETRI_TRANSITIONS=64} [2020-10-09 17:48:52,528 INFO L341 CegarLoopForPetriNet]: 76 programPoint places, 16 predicate places. [2020-10-09 17:48:52,528 INFO L481 AbstractCegarLoop]: Abstraction has has 92 places, 64 transitions, 180 flow [2020-10-09 17:48:52,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:48:52,528 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:48:52,529 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, 1, 1, 1, 1, 1] [2020-10-09 17:48:52,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 17:48:52,740 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:48:52,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:48:52,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1433256011, now seen corresponding path program 1 times [2020-10-09 17:48:52,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:48:52,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931338729] [2020-10-09 17:48:52,743 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 17:48:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:48:52,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:48:52,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:48:52,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:48:52,879 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 17:48:52,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:48:52,934 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 17:48:52,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931338729] [2020-10-09 17:48:52,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:48:52,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2020-10-09 17:48:52,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466054050] [2020-10-09 17:48:52,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 17:48:52,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:48:52,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 17:48:52,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-09 17:48:53,126 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 81 [2020-10-09 17:48:53,128 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 64 transitions, 180 flow. Second operand 10 states. [2020-10-09 17:48:53,128 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:48:53,128 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 81 [2020-10-09 17:48:53,128 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:48:53,348 INFO L129 PetriNetUnfolder]: 7/172 cut-off events. [2020-10-09 17:48:53,348 INFO L130 PetriNetUnfolder]: For 122/171 co-relation queries the response was YES. [2020-10-09 17:48:53,352 INFO L80 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 172 events. 7/172 cut-off events. For 122/171 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 712 event pairs, 0 based on Foata normal form. 10/179 useless extension candidates. Maximal degree in co-relation 305. Up to 14 conditions per place. [2020-10-09 17:48:53,353 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 10 selfloop transitions, 7 changer transitions 18/86 dead transitions. [2020-10-09 17:48:53,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 86 transitions, 363 flow [2020-10-09 17:48:53,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 17:48:53,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-09 17:48:53,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1194 transitions. [2020-10-09 17:48:53,360 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8671023965141612 [2020-10-09 17:48:53,360 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1194 transitions. [2020-10-09 17:48:53,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1194 transitions. [2020-10-09 17:48:53,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:48:53,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1194 transitions. [2020-10-09 17:48:53,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-09 17:48:53,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-09 17:48:53,369 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-09 17:48:53,369 INFO L185 Difference]: Start difference. First operand has 92 places, 64 transitions, 180 flow. Second operand 17 states and 1194 transitions. [2020-10-09 17:48:53,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 86 transitions, 363 flow [2020-10-09 17:48:53,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 86 transitions, 311 flow, removed 24 selfloop flow, removed 8 redundant places. [2020-10-09 17:48:53,377 INFO L241 Difference]: Finished difference. Result has 105 places, 64 transitions, 205 flow [2020-10-09 17:48:53,377 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=205, PETRI_PLACES=105, PETRI_TRANSITIONS=64} [2020-10-09 17:48:53,378 INFO L341 CegarLoopForPetriNet]: 76 programPoint places, 29 predicate places. [2020-10-09 17:48:53,378 INFO L481 AbstractCegarLoop]: Abstraction has has 105 places, 64 transitions, 205 flow [2020-10-09 17:48:53,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 17:48:53,378 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:48:53,378 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, 1, 1, 1, 1, 1] [2020-10-09 17:48:53,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 17:48:53,592 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:48:53,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:48:53,593 INFO L82 PathProgramCache]: Analyzing trace with hash 511194891, now seen corresponding path program 2 times [2020-10-09 17:48:53,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:48:53,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825961858] [2020-10-09 17:48:53,594 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 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 17:48:53,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 17:48:53,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 17:48:53,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:48:53,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:48:53,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:48:53,700 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 17:48:53,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:48:53,752 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 17:48:53,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825961858] [2020-10-09 17:48:53,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:48:53,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:48:53,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297988977] [2020-10-09 17:48:53,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:48:53,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:48:53,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:48:53,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:48:54,065 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 81 [2020-10-09 17:48:54,065 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 64 transitions, 205 flow. Second operand 9 states. [2020-10-09 17:48:54,066 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:48:54,066 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 81 [2020-10-09 17:48:54,066 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:48:54,220 INFO L129 PetriNetUnfolder]: 8/139 cut-off events. [2020-10-09 17:48:54,221 INFO L130 PetriNetUnfolder]: For 238/268 co-relation queries the response was YES. [2020-10-09 17:48:54,222 INFO L80 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 139 events. 8/139 cut-off events. For 238/268 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 527 event pairs, 0 based on Foata normal form. 4/141 useless extension candidates. Maximal degree in co-relation 294. Up to 12 conditions per place. [2020-10-09 17:48:54,223 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 6 selfloop transitions, 4 changer transitions 12/76 dead transitions. [2020-10-09 17:48:54,223 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 76 transitions, 322 flow [2020-10-09 17:48:54,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 17:48:54,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 17:48:54,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 714 transitions. [2020-10-09 17:48:54,227 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8814814814814815 [2020-10-09 17:48:54,227 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 714 transitions. [2020-10-09 17:48:54,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 714 transitions. [2020-10-09 17:48:54,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:48:54,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 714 transitions. [2020-10-09 17:48:54,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 17:48:54,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 17:48:54,234 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 17:48:54,234 INFO L185 Difference]: Start difference. First operand has 105 places, 64 transitions, 205 flow. Second operand 10 states and 714 transitions. [2020-10-09 17:48:54,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 76 transitions, 322 flow [2020-10-09 17:48:54,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 76 transitions, 244 flow, removed 30 selfloop flow, removed 15 redundant places. [2020-10-09 17:48:54,244 INFO L241 Difference]: Finished difference. Result has 96 places, 64 transitions, 193 flow [2020-10-09 17:48:54,245 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=193, PETRI_PLACES=96, PETRI_TRANSITIONS=64} [2020-10-09 17:48:54,245 INFO L341 CegarLoopForPetriNet]: 76 programPoint places, 20 predicate places. [2020-10-09 17:48:54,245 INFO L481 AbstractCegarLoop]: Abstraction has has 96 places, 64 transitions, 193 flow [2020-10-09 17:48:54,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:48:54,246 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:48:54,246 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 17:48:54,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 17:48:54,459 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:48:54,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:48:54,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1303677052, now seen corresponding path program 1 times [2020-10-09 17:48:54,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:48:54,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530506229] [2020-10-09 17:48:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-09 17:48:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:48:54,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 17:48:54,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:48:54,536 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:48:54,556 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 17:48:54,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:48:54,581 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 17:48:54,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530506229] [2020-10-09 17:48:54,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:48:54,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:48:54,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002425812] [2020-10-09 17:48:54,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:48:54,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:48:54,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:48:54,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:48:54,664 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 81 [2020-10-09 17:48:54,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 64 transitions, 193 flow. Second operand 8 states. [2020-10-09 17:48:54,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:48:54,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 81 [2020-10-09 17:48:54,666 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:48:54,959 INFO L129 PetriNetUnfolder]: 427/979 cut-off events. [2020-10-09 17:48:54,959 INFO L130 PetriNetUnfolder]: For 210/211 co-relation queries the response was YES. [2020-10-09 17:48:54,965 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1882 conditions, 979 events. 427/979 cut-off events. For 210/211 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 6463 event pairs, 4 based on Foata normal form. 30/974 useless extension candidates. Maximal degree in co-relation 1842. Up to 278 conditions per place. [2020-10-09 17:48:54,970 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 12 selfloop transitions, 11 changer transitions 35/111 dead transitions. [2020-10-09 17:48:54,971 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 111 transitions, 403 flow [2020-10-09 17:48:54,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 17:48:54,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-09 17:48:54,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 865 transitions. [2020-10-09 17:48:54,975 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8899176954732511 [2020-10-09 17:48:54,975 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 865 transitions. [2020-10-09 17:48:54,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 865 transitions. [2020-10-09 17:48:54,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:48:54,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 865 transitions. [2020-10-09 17:48:54,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-09 17:48:54,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-09 17:48:54,981 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-09 17:48:54,981 INFO L185 Difference]: Start difference. First operand has 96 places, 64 transitions, 193 flow. Second operand 12 states and 865 transitions. [2020-10-09 17:48:54,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 111 transitions, 403 flow [2020-10-09 17:48:54,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 111 transitions, 377 flow, removed 8 selfloop flow, removed 10 redundant places. [2020-10-09 17:48:54,987 INFO L241 Difference]: Finished difference. Result has 100 places, 72 transitions, 289 flow [2020-10-09 17:48:54,988 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=289, PETRI_PLACES=100, PETRI_TRANSITIONS=72} [2020-10-09 17:48:54,988 INFO L341 CegarLoopForPetriNet]: 76 programPoint places, 24 predicate places. [2020-10-09 17:48:54,988 INFO L481 AbstractCegarLoop]: Abstraction has has 100 places, 72 transitions, 289 flow [2020-10-09 17:48:54,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:48:54,988 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:48:54,989 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 17:48:55,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-09 17:48:55,203 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:48:55,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:48:55,203 INFO L82 PathProgramCache]: Analyzing trace with hash -943619817, now seen corresponding path program 1 times [2020-10-09 17:48:55,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:48:55,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895477518] [2020-10-09 17:48:55,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-09 17:48:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:48:55,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 17:48:55,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:48:55,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:48:55,325 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 17:48:55,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:48:55,369 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 17:48:55,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895477518] [2020-10-09 17:48:55,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:48:55,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2020-10-09 17:48:55,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714908728] [2020-10-09 17:48:55,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 17:48:55,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:48:55,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 17:48:55,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-09 17:48:55,501 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 81 [2020-10-09 17:48:55,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 72 transitions, 289 flow. Second operand 10 states. [2020-10-09 17:48:55,502 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:48:55,502 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 81 [2020-10-09 17:48:55,503 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:48:55,770 INFO L129 PetriNetUnfolder]: 160/426 cut-off events. [2020-10-09 17:48:55,771 INFO L130 PetriNetUnfolder]: For 2616/2839 co-relation queries the response was YES. [2020-10-09 17:48:55,773 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1974 conditions, 426 events. 160/426 cut-off events. For 2616/2839 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2267 event pairs, 0 based on Foata normal form. 52/466 useless extension candidates. Maximal degree in co-relation 1939. Up to 209 conditions per place. [2020-10-09 17:48:55,775 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 4 selfloop transitions, 19 changer transitions 29/103 dead transitions. [2020-10-09 17:48:55,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 103 transitions, 733 flow [2020-10-09 17:48:55,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 17:48:55,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-09 17:48:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 991 transitions. [2020-10-09 17:48:55,779 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8738977072310405 [2020-10-09 17:48:55,780 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 991 transitions. [2020-10-09 17:48:55,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 991 transitions. [2020-10-09 17:48:55,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:48:55,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 991 transitions. [2020-10-09 17:48:55,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 15 states. [2020-10-09 17:48:55,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 15 states. [2020-10-09 17:48:55,786 INFO L81 ComplementDD]: Finished complementDD. Result 15 states. [2020-10-09 17:48:55,786 INFO L185 Difference]: Start difference. First operand has 100 places, 72 transitions, 289 flow. Second operand 14 states and 991 transitions. [2020-10-09 17:48:55,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 103 transitions, 733 flow [2020-10-09 17:48:55,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 103 transitions, 588 flow, removed 64 selfloop flow, removed 9 redundant places. [2020-10-09 17:48:55,797 INFO L241 Difference]: Finished difference. Result has 107 places, 74 transitions, 354 flow [2020-10-09 17:48:55,797 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=354, PETRI_PLACES=107, PETRI_TRANSITIONS=74} [2020-10-09 17:48:55,798 INFO L341 CegarLoopForPetriNet]: 76 programPoint places, 31 predicate places. [2020-10-09 17:48:55,798 INFO L481 AbstractCegarLoop]: Abstraction has has 107 places, 74 transitions, 354 flow [2020-10-09 17:48:55,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 17:48:55,798 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:48:55,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 17:48:56,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-09 17:48:56,012 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:48:56,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:48:56,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1339879573, now seen corresponding path program 1 times [2020-10-09 17:48:56,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:48:56,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989367908] [2020-10-09 17:48:56,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-10-09 17:48:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:48:56,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:48:56,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:48:56,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:48:56,115 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 17:48:56,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:48:56,160 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 17:48:56,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989367908] [2020-10-09 17:48:56,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:48:56,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:48:56,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472649767] [2020-10-09 17:48:56,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:48:56,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:48:56,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:48:56,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:48:56,447 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 81 [2020-10-09 17:48:56,448 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 74 transitions, 354 flow. Second operand 9 states. [2020-10-09 17:48:56,448 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:48:56,448 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 81 [2020-10-09 17:48:56,448 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:48:56,528 INFO L129 PetriNetUnfolder]: 17/110 cut-off events. [2020-10-09 17:48:56,528 INFO L130 PetriNetUnfolder]: For 240/270 co-relation queries the response was YES. [2020-10-09 17:48:56,529 INFO L80 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 110 events. 17/110 cut-off events. For 240/270 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 239 event pairs, 0 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 284. Up to 30 conditions per place. [2020-10-09 17:48:56,529 INFO L132 encePairwiseOnDemand]: 75/81 looper letters, 0 selfloop transitions, 0 changer transitions 72/72 dead transitions. [2020-10-09 17:48:56,529 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 72 transitions, 368 flow [2020-10-09 17:48:56,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 17:48:56,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 17:48:56,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 493 transitions. [2020-10-09 17:48:56,531 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8694885361552028 [2020-10-09 17:48:56,532 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 493 transitions. [2020-10-09 17:48:56,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 493 transitions. [2020-10-09 17:48:56,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:48:56,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 493 transitions. [2020-10-09 17:48:56,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 17:48:56,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 17:48:56,535 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 17:48:56,535 INFO L185 Difference]: Start difference. First operand has 107 places, 74 transitions, 354 flow. Second operand 7 states and 493 transitions. [2020-10-09 17:48:56,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 72 transitions, 368 flow [2020-10-09 17:48:56,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 72 transitions, 214 flow, removed 46 selfloop flow, removed 21 redundant places. [2020-10-09 17:48:56,538 INFO L241 Difference]: Finished difference. Result has 83 places, 0 transitions, 0 flow [2020-10-09 17:48:56,538 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=83, PETRI_TRANSITIONS=0} [2020-10-09 17:48:56,538 INFO L341 CegarLoopForPetriNet]: 76 programPoint places, 7 predicate places. [2020-10-09 17:48:56,538 INFO L481 AbstractCegarLoop]: Abstraction has has 83 places, 0 transitions, 0 flow [2020-10-09 17:48:56,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:48:56,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-09 17:48:56,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 05:48:56 BasicIcfg [2020-10-09 17:48:56,765 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 17:48:56,768 INFO L168 Benchmark]: Toolchain (without parser) took 8057.32 ms. Allocated memory was 252.7 MB in the beginning and 435.2 MB in the end (delta: 182.5 MB). Free memory was 208.0 MB in the beginning and 391.8 MB in the end (delta: -183.8 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:48:56,768 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 252.7 MB. Free memory is still 229.1 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:48:56,769 INFO L168 Benchmark]: CACSL2BoogieTranslator took 865.17 ms. Allocated memory was 252.7 MB in the beginning and 326.1 MB in the end (delta: 73.4 MB). Free memory was 208.0 MB in the beginning and 278.9 MB in the end (delta: -70.9 MB). Peak memory consumption was 30.4 MB. Max. memory is 14.2 GB. [2020-10-09 17:48:56,770 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.67 ms. Allocated memory is still 326.1 MB. Free memory is still 278.9 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:48:56,770 INFO L168 Benchmark]: Boogie Preprocessor took 27.18 ms. Allocated memory is still 326.1 MB. Free memory was 278.9 MB in the beginning and 276.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:48:56,771 INFO L168 Benchmark]: RCFGBuilder took 474.53 ms. Allocated memory is still 326.1 MB. Free memory was 276.4 MB in the beginning and 252.1 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 14.2 GB. [2020-10-09 17:48:56,772 INFO L168 Benchmark]: TraceAbstraction took 6639.25 ms. Allocated memory was 326.1 MB in the beginning and 435.2 MB in the end (delta: 109.1 MB). Free memory was 252.1 MB in the beginning and 391.8 MB in the end (delta: -139.8 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:48:56,776 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 252.7 MB. Free memory is still 229.1 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 865.17 ms. Allocated memory was 252.7 MB in the beginning and 326.1 MB in the end (delta: 73.4 MB). Free memory was 208.0 MB in the beginning and 278.9 MB in the end (delta: -70.9 MB). Peak memory consumption was 30.4 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 45.67 ms. Allocated memory is still 326.1 MB. Free memory is still 278.9 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 27.18 ms. Allocated memory is still 326.1 MB. Free memory was 278.9 MB in the beginning and 276.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 474.53 ms. Allocated memory is still 326.1 MB. Free memory was 276.4 MB in the beginning and 252.1 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 14.2 GB. * TraceAbstraction took 6639.25 ms. Allocated memory was 326.1 MB in the beginning and 435.2 MB in the end (delta: 109.1 MB). Free memory was 252.1 MB in the beginning and 391.8 MB in the end (delta: -139.8 MB). There was no memory consumed. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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 5 procedures, 80 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: 6.5s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 68 SDtfs, 356 SDslu, 576 SDs, 0 SdLazy, 590 SolverSat, 134 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 783 GetRequests, 654 SyntacticMatches, 16 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=354occurred in iteration=7, 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, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 370 NumberOfCodeBlocks, 370 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 724 ConstructedInterpolants, 0 QuantifiedInterpolants, 91319 SizeOfPredicates, 69 NumberOfNonLiveVariables, 1006 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 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...