/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/safe027_pso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 17:55:33,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 17:55:33,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 17:55:33,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 17:55:33,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 17:55:33,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 17:55:33,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 17:55:33,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 17:55:33,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 17:55:33,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 17:55:33,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 17:55:33,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 17:55:33,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 17:55:33,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 17:55:33,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 17:55:33,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 17:55:33,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 17:55:33,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 17:55:33,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 17:55:33,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 17:55:33,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 17:55:33,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 17:55:33,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 17:55:33,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 17:55:33,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 17:55:33,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 17:55:33,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 17:55:33,344 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 17:55:33,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 17:55:33,346 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 17:55:33,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 17:55:33,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 17:55:33,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 17:55:33,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 17:55:33,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 17:55:33,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 17:55:33,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 17:55:33,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 17:55:33,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 17:55:33,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 17:55:33,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 17:55:33,357 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 17:55:33,384 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 17:55:33,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 17:55:33,385 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 17:55:33,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 17:55:33,386 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 17:55:33,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 17:55:33,386 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 17:55:33,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 17:55:33,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 17:55:33,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 17:55:33,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 17:55:33,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 17:55:33,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 17:55:33,388 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 17:55:33,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 17:55:33,388 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 17:55:33,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 17:55:33,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 17:55:33,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 17:55:33,389 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 17:55:33,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 17:55:33,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 17:55:33,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 17:55:33,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 17:55:33,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 17:55:33,390 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 17:55:33,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 17:55:33,391 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 17:55:33,391 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 17:55:33,391 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 17:55:33,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 17:55:33,727 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 17:55:33,730 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 17:55:33,732 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 17:55:33,733 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 17:55:33,733 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.opt.i [2020-10-09 17:55:33,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f71dafdc1/ea5ff93fc2cd47b0a6f269bd59b33515/FLAG985ee1fa3 [2020-10-09 17:55:34,389 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 17:55:34,390 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_pso.opt.i [2020-10-09 17:55:34,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f71dafdc1/ea5ff93fc2cd47b0a6f269bd59b33515/FLAG985ee1fa3 [2020-10-09 17:55:34,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f71dafdc1/ea5ff93fc2cd47b0a6f269bd59b33515 [2020-10-09 17:55:34,778 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 17:55:34,781 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 17:55:34,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 17:55:34,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 17:55:34,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 17:55:34,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:55:34" (1/1) ... [2020-10-09 17:55:34,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5624ee08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:34, skipping insertion in model container [2020-10-09 17:55:34,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:55:34" (1/1) ... [2020-10-09 17:55:34,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 17:55:34,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 17:55:35,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:55:35,303 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 17:55:35,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:55:35,436 INFO L208 MainTranslator]: Completed translation [2020-10-09 17:55:35,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:35 WrapperNode [2020-10-09 17:55:35,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 17:55:35,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 17:55:35,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 17:55:35,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 17:55:35,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:35" (1/1) ... [2020-10-09 17:55:35,465 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:35" (1/1) ... [2020-10-09 17:55:35,489 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 17:55:35,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 17:55:35,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 17:55:35,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 17:55:35,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:35" (1/1) ... [2020-10-09 17:55:35,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:35" (1/1) ... [2020-10-09 17:55:35,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:35" (1/1) ... [2020-10-09 17:55:35,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:35" (1/1) ... [2020-10-09 17:55:35,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:35" (1/1) ... [2020-10-09 17:55:35,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:35" (1/1) ... [2020-10-09 17:55:35,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:35" (1/1) ... [2020-10-09 17:55:35,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 17:55:35,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 17:55:35,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 17:55:35,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 17:55:35,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:35" (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 17:55:35,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 17:55:35,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 17:55:35,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 17:55:35,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 17:55:35,587 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-09 17:55:35,587 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-09 17:55:35,587 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-09 17:55:35,587 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-09 17:55:35,587 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-09 17:55:35,588 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-09 17:55:35,588 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2020-10-09 17:55:35,588 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2020-10-09 17:55:35,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 17:55:35,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 17:55:35,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 17:55:35,590 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 17:55:35,982 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 17:55:35,983 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-09 17:55:35,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:55:35 BoogieIcfgContainer [2020-10-09 17:55:35,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 17:55:35,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 17:55:35,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 17:55:35,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 17:55:35,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 05:55:34" (1/3) ... [2020-10-09 17:55:35,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2d6e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:55:35, skipping insertion in model container [2020-10-09 17:55:35,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:35" (2/3) ... [2020-10-09 17:55:35,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2d6e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:55:35, skipping insertion in model container [2020-10-09 17:55:35,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:55:35" (3/3) ... [2020-10-09 17:55:35,994 INFO L111 eAbstractionObserver]: Analyzing ICFG safe027_pso.opt.i [2020-10-09 17:55:36,005 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 17:55:36,013 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 17:55:36,014 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 17:55:36,044 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,044 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,045 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,045 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,048 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,049 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,052 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,052 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,053 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,053 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,053 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,053 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,054 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,054 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,054 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,054 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,055 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,057 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,058 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,058 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,058 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,058 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,059 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,060 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,068 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,069 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,069 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,069 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,076 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,076 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,077 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,077 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,080 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,080 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,080 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,081 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,083 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,083 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,084 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,084 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:36,104 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-10-09 17:55:36,131 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 17:55:36,131 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 17:55:36,131 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 17:55:36,131 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 17:55:36,132 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 17:55:36,132 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 17:55:36,132 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 17:55:36,132 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 17:55:36,157 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 93 places, 82 transitions, 184 flow [2020-10-09 17:55:36,239 INFO L129 PetriNetUnfolder]: 2/78 cut-off events. [2020-10-09 17:55:36,239 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:55:36,245 INFO L80 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 78 events. 2/78 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 61 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2020-10-09 17:55:36,245 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 82 transitions, 184 flow [2020-10-09 17:55:36,251 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 65 transitions, 142 flow [2020-10-09 17:55:36,273 INFO L129 PetriNetUnfolder]: 1/64 cut-off events. [2020-10-09 17:55:36,274 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:55:36,274 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:55:36,275 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 17:55:36,276 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:55:36,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:55:36,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1315035169, now seen corresponding path program 1 times [2020-10-09 17:55:36,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:55:36,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183683238] [2020-10-09 17:55:36,299 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 17:55:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:55:36,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:55:36,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:55:36,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:55:36,582 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 17:55:36,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:55:36,703 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 17:55:36,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183683238] [2020-10-09 17:55:36,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:55:36,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:55:36,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615107837] [2020-10-09 17:55:36,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:55:36,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:55:36,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:55:36,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:55:36,990 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 82 [2020-10-09 17:55:36,993 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 65 transitions, 142 flow. Second operand 8 states. [2020-10-09 17:55:36,993 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:55:36,993 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 82 [2020-10-09 17:55:36,995 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:55:37,101 INFO L129 PetriNetUnfolder]: 3/79 cut-off events. [2020-10-09 17:55:37,101 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:55:37,102 INFO L80 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 79 events. 3/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 106 event pairs, 0 based on Foata normal form. 4/82 useless extension candidates. Maximal degree in co-relation 85. Up to 7 conditions per place. [2020-10-09 17:55:37,104 INFO L132 encePairwiseOnDemand]: 75/82 looper letters, 6 selfloop transitions, 2 changer transitions 11/74 dead transitions. [2020-10-09 17:55:37,104 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 74 transitions, 196 flow [2020-10-09 17:55:37,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:55:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:55:37,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 670 transitions. [2020-10-09 17:55:37,124 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.907859078590786 [2020-10-09 17:55:37,125 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 670 transitions. [2020-10-09 17:55:37,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 670 transitions. [2020-10-09 17:55:37,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:55:37,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 670 transitions. [2020-10-09 17:55:37,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:55:37,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:55:37,148 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:55:37,151 INFO L185 Difference]: Start difference. First operand has 77 places, 65 transitions, 142 flow. Second operand 9 states and 670 transitions. [2020-10-09 17:55:37,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 74 transitions, 196 flow [2020-10-09 17:55:37,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 74 transitions, 192 flow, removed 0 selfloop flow, removed 4 redundant places. [2020-10-09 17:55:37,166 INFO L241 Difference]: Finished difference. Result has 88 places, 63 transitions, 154 flow [2020-10-09 17:55:37,170 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=73, 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=154, PETRI_PLACES=88, PETRI_TRANSITIONS=63} [2020-10-09 17:55:37,171 INFO L341 CegarLoopForPetriNet]: 77 programPoint places, 11 predicate places. [2020-10-09 17:55:37,172 INFO L481 AbstractCegarLoop]: Abstraction has has 88 places, 63 transitions, 154 flow [2020-10-09 17:55:37,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:55:37,172 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:55:37,173 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] [2020-10-09 17:55:37,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 17:55:37,386 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:55:37,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:55:37,388 INFO L82 PathProgramCache]: Analyzing trace with hash -620534110, now seen corresponding path program 1 times [2020-10-09 17:55:37,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:55:37,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516613348] [2020-10-09 17:55:37,389 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 17:55:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:55:37,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:55:37,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:55:37,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:55:37,553 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 17:55:37,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:55:37,625 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 17:55:37,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516613348] [2020-10-09 17:55:37,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:55:37,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:55:37,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002089885] [2020-10-09 17:55:37,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:55:37,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:55:37,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:55:37,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:55:37,790 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 82 [2020-10-09 17:55:37,791 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 63 transitions, 154 flow. Second operand 8 states. [2020-10-09 17:55:37,792 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:55:37,792 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 82 [2020-10-09 17:55:37,792 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:55:37,900 INFO L129 PetriNetUnfolder]: 3/86 cut-off events. [2020-10-09 17:55:37,900 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2020-10-09 17:55:37,901 INFO L80 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 86 events. 3/86 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 129 event pairs, 0 based on Foata normal form. 2/88 useless extension candidates. Maximal degree in co-relation 127. Up to 7 conditions per place. [2020-10-09 17:55:37,902 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 6 selfloop transitions, 2 changer transitions 10/73 dead transitions. [2020-10-09 17:55:37,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 73 transitions, 228 flow [2020-10-09 17:55:37,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:55:37,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:55:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 668 transitions. [2020-10-09 17:55:37,905 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9051490514905149 [2020-10-09 17:55:37,905 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 668 transitions. [2020-10-09 17:55:37,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 668 transitions. [2020-10-09 17:55:37,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:55:37,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 668 transitions. [2020-10-09 17:55:37,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:55:37,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:55:37,911 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:55:37,911 INFO L185 Difference]: Start difference. First operand has 88 places, 63 transitions, 154 flow. Second operand 9 states and 668 transitions. [2020-10-09 17:55:37,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 73 transitions, 228 flow [2020-10-09 17:55:37,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 73 transitions, 196 flow, removed 14 selfloop flow, removed 8 redundant places. [2020-10-09 17:55:37,915 INFO L241 Difference]: Finished difference. Result has 88 places, 63 transitions, 158 flow [2020-10-09 17:55:37,915 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=158, PETRI_PLACES=88, PETRI_TRANSITIONS=63} [2020-10-09 17:55:37,916 INFO L341 CegarLoopForPetriNet]: 77 programPoint places, 11 predicate places. [2020-10-09 17:55:37,916 INFO L481 AbstractCegarLoop]: Abstraction has has 88 places, 63 transitions, 158 flow [2020-10-09 17:55:37,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:55:37,917 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:55:37,917 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] [2020-10-09 17:55:38,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 17:55:38,135 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:55:38,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:55:38,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1054644803, now seen corresponding path program 1 times [2020-10-09 17:55:38,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:55:38,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172873428] [2020-10-09 17:55:38,138 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 17:55:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:55:38,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:55:38,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:55:38,262 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:55:38,288 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 17:55:38,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:55:38,339 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 17:55:38,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172873428] [2020-10-09 17:55:38,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:55:38,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:55:38,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863489784] [2020-10-09 17:55:38,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:55:38,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:55:38,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:55:38,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:55:38,644 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 82 [2020-10-09 17:55:38,644 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 63 transitions, 158 flow. Second operand 9 states. [2020-10-09 17:55:38,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:55:38,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 82 [2020-10-09 17:55:38,645 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:55:38,765 INFO L129 PetriNetUnfolder]: 4/84 cut-off events. [2020-10-09 17:55:38,766 INFO L130 PetriNetUnfolder]: For 22/29 co-relation queries the response was YES. [2020-10-09 17:55:38,766 INFO L80 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 84 events. 4/84 cut-off events. For 22/29 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 131 event pairs, 0 based on Foata normal form. 2/85 useless extension candidates. Maximal degree in co-relation 136. Up to 7 conditions per place. [2020-10-09 17:55:38,767 INFO L132 encePairwiseOnDemand]: 74/82 looper letters, 6 selfloop transitions, 4 changer transitions 12/75 dead transitions. [2020-10-09 17:55:38,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 75 transitions, 251 flow [2020-10-09 17:55:38,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 17:55:38,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 17:55:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 724 transitions. [2020-10-09 17:55:38,771 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8829268292682927 [2020-10-09 17:55:38,771 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 724 transitions. [2020-10-09 17:55:38,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 724 transitions. [2020-10-09 17:55:38,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:55:38,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 724 transitions. [2020-10-09 17:55:38,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 17:55:38,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 17:55:38,776 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 17:55:38,776 INFO L185 Difference]: Start difference. First operand has 88 places, 63 transitions, 158 flow. Second operand 10 states and 724 transitions. [2020-10-09 17:55:38,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 75 transitions, 251 flow [2020-10-09 17:55:38,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 75 transitions, 219 flow, removed 14 selfloop flow, removed 8 redundant places. [2020-10-09 17:55:38,780 INFO L241 Difference]: Finished difference. Result has 91 places, 63 transitions, 172 flow [2020-10-09 17:55:38,780 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=172, PETRI_PLACES=91, PETRI_TRANSITIONS=63} [2020-10-09 17:55:38,781 INFO L341 CegarLoopForPetriNet]: 77 programPoint places, 14 predicate places. [2020-10-09 17:55:38,781 INFO L481 AbstractCegarLoop]: Abstraction has has 91 places, 63 transitions, 172 flow [2020-10-09 17:55:38,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:55:38,781 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:55:38,781 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] [2020-10-09 17:55:38,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 17:55:38,995 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:55:38,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:55:38,996 INFO L82 PathProgramCache]: Analyzing trace with hash -931691630, now seen corresponding path program 1 times [2020-10-09 17:55:38,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:55:38,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051441208] [2020-10-09 17:55:38,998 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 17:55:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:55:39,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:55:39,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:55:39,084 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:55:39,108 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 17:55:39,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:55:39,161 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 17:55:39,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051441208] [2020-10-09 17:55:39,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:55:39,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:55:39,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584431211] [2020-10-09 17:55:39,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:55:39,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:55:39,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:55:39,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:55:39,377 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 82 [2020-10-09 17:55:39,379 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 63 transitions, 172 flow. Second operand 9 states. [2020-10-09 17:55:39,379 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:55:39,379 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 82 [2020-10-09 17:55:39,379 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:55:39,520 INFO L129 PetriNetUnfolder]: 4/84 cut-off events. [2020-10-09 17:55:39,520 INFO L130 PetriNetUnfolder]: For 57/67 co-relation queries the response was YES. [2020-10-09 17:55:39,521 INFO L80 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 84 events. 4/84 cut-off events. For 57/67 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 149 event pairs, 0 based on Foata normal form. 2/86 useless extension candidates. Maximal degree in co-relation 147. Up to 7 conditions per place. [2020-10-09 17:55:39,522 INFO L132 encePairwiseOnDemand]: 74/82 looper letters, 6 selfloop transitions, 4 changer transitions 12/75 dead transitions. [2020-10-09 17:55:39,523 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 75 transitions, 273 flow [2020-10-09 17:55:39,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 17:55:39,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 17:55:39,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 724 transitions. [2020-10-09 17:55:39,527 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8829268292682927 [2020-10-09 17:55:39,527 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 724 transitions. [2020-10-09 17:55:39,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 724 transitions. [2020-10-09 17:55:39,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:55:39,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 724 transitions. [2020-10-09 17:55:39,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 17:55:39,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 17:55:39,534 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 17:55:39,534 INFO L185 Difference]: Start difference. First operand has 91 places, 63 transitions, 172 flow. Second operand 10 states and 724 transitions. [2020-10-09 17:55:39,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 75 transitions, 273 flow [2020-10-09 17:55:39,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 75 transitions, 223 flow, removed 20 selfloop flow, removed 10 redundant places. [2020-10-09 17:55:39,538 INFO L241 Difference]: Finished difference. Result has 92 places, 63 transitions, 176 flow [2020-10-09 17:55:39,539 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=176, PETRI_PLACES=92, PETRI_TRANSITIONS=63} [2020-10-09 17:55:39,539 INFO L341 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2020-10-09 17:55:39,539 INFO L481 AbstractCegarLoop]: Abstraction has has 92 places, 63 transitions, 176 flow [2020-10-09 17:55:39,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:55:39,540 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:55:39,540 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] [2020-10-09 17:55:39,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 17:55:39,754 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:55:39,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:55:39,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1625882267, now seen corresponding path program 1 times [2020-10-09 17:55:39,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:55:39,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919758836] [2020-10-09 17:55:39,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-09 17:55:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:55:39,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 17:55:39,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:55:39,821 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:55:39,842 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 17:55:39,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:55:39,866 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 17:55:39,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919758836] [2020-10-09 17:55:39,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:55:39,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:55:39,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998055837] [2020-10-09 17:55:39,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:55:39,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:55:39,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:55:39,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:55:40,054 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 82 [2020-10-09 17:55:40,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 63 transitions, 176 flow. Second operand 8 states. [2020-10-09 17:55:40,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:55:40,056 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 82 [2020-10-09 17:55:40,056 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:55:40,296 INFO L129 PetriNetUnfolder]: 214/520 cut-off events. [2020-10-09 17:55:40,296 INFO L130 PetriNetUnfolder]: For 104/105 co-relation queries the response was YES. [2020-10-09 17:55:40,301 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1012 conditions, 520 events. 214/520 cut-off events. For 104/105 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2913 event pairs, 2 based on Foata normal form. 16/531 useless extension candidates. Maximal degree in co-relation 974. Up to 136 conditions per place. [2020-10-09 17:55:40,304 INFO L132 encePairwiseOnDemand]: 72/82 looper letters, 12 selfloop transitions, 11 changer transitions 35/110 dead transitions. [2020-10-09 17:55:40,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 110 transitions, 386 flow [2020-10-09 17:55:40,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 17:55:40,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-09 17:55:40,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 877 transitions. [2020-10-09 17:55:40,308 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.891260162601626 [2020-10-09 17:55:40,308 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 877 transitions. [2020-10-09 17:55:40,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 877 transitions. [2020-10-09 17:55:40,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:55:40,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 877 transitions. [2020-10-09 17:55:40,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-09 17:55:40,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-09 17:55:40,314 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-09 17:55:40,314 INFO L185 Difference]: Start difference. First operand has 92 places, 63 transitions, 176 flow. Second operand 12 states and 877 transitions. [2020-10-09 17:55:40,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 110 transitions, 386 flow [2020-10-09 17:55:40,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 110 transitions, 360 flow, removed 8 selfloop flow, removed 10 redundant places. [2020-10-09 17:55:40,320 INFO L241 Difference]: Finished difference. Result has 96 places, 71 transitions, 272 flow [2020-10-09 17:55:40,321 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=272, PETRI_PLACES=96, PETRI_TRANSITIONS=71} [2020-10-09 17:55:40,321 INFO L341 CegarLoopForPetriNet]: 77 programPoint places, 19 predicate places. [2020-10-09 17:55:40,321 INFO L481 AbstractCegarLoop]: Abstraction has has 96 places, 71 transitions, 272 flow [2020-10-09 17:55:40,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:55:40,321 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:55:40,322 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] [2020-10-09 17:55:40,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 17:55:40,535 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:55:40,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:55:40,536 INFO L82 PathProgramCache]: Analyzing trace with hash -296988524, now seen corresponding path program 1 times [2020-10-09 17:55:40,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:55:40,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281900460] [2020-10-09 17:55:40,538 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 17:55:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:55:40,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 17:55:40,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:55:40,621 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:55:40,646 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 17:55:40,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:55:40,686 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 17:55:40,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281900460] [2020-10-09 17:55:40,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:55:40,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2020-10-09 17:55:40,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269994834] [2020-10-09 17:55:40,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 17:55:40,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:55:40,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 17:55:40,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-09 17:55:40,770 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 82 [2020-10-09 17:55:40,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 71 transitions, 272 flow. Second operand 10 states. [2020-10-09 17:55:40,771 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:55:40,771 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 82 [2020-10-09 17:55:40,771 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:55:41,027 INFO L129 PetriNetUnfolder]: 80/230 cut-off events. [2020-10-09 17:55:41,027 INFO L130 PetriNetUnfolder]: For 1330/1378 co-relation queries the response was YES. [2020-10-09 17:55:41,028 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1017 conditions, 230 events. 80/230 cut-off events. For 1330/1378 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 917 event pairs, 0 based on Foata normal form. 25/252 useless extension candidates. Maximal degree in co-relation 990. Up to 105 conditions per place. [2020-10-09 17:55:41,031 INFO L132 encePairwiseOnDemand]: 72/82 looper letters, 4 selfloop transitions, 19 changer transitions 27/102 dead transitions. [2020-10-09 17:55:41,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 102 transitions, 716 flow [2020-10-09 17:55:41,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 17:55:41,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-09 17:55:41,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1005 transitions. [2020-10-09 17:55:41,036 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8754355400696864 [2020-10-09 17:55:41,036 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1005 transitions. [2020-10-09 17:55:41,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1005 transitions. [2020-10-09 17:55:41,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:55:41,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1005 transitions. [2020-10-09 17:55:41,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 15 states. [2020-10-09 17:55:41,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 15 states. [2020-10-09 17:55:41,048 INFO L81 ComplementDD]: Finished complementDD. Result 15 states. [2020-10-09 17:55:41,048 INFO L185 Difference]: Start difference. First operand has 96 places, 71 transitions, 272 flow. Second operand 14 states and 1005 transitions. [2020-10-09 17:55:41,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 102 transitions, 716 flow [2020-10-09 17:55:41,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 102 transitions, 571 flow, removed 64 selfloop flow, removed 9 redundant places. [2020-10-09 17:55:41,059 INFO L241 Difference]: Finished difference. Result has 103 places, 75 transitions, 346 flow [2020-10-09 17:55:41,060 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=346, PETRI_PLACES=103, PETRI_TRANSITIONS=75} [2020-10-09 17:55:41,060 INFO L341 CegarLoopForPetriNet]: 77 programPoint places, 26 predicate places. [2020-10-09 17:55:41,060 INFO L481 AbstractCegarLoop]: Abstraction has has 103 places, 75 transitions, 346 flow [2020-10-09 17:55:41,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 17:55:41,061 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:55:41,061 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, 1] [2020-10-09 17:55:41,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-09 17:55:41,275 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:55:41,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:55:41,275 INFO L82 PathProgramCache]: Analyzing trace with hash 722657230, now seen corresponding path program 1 times [2020-10-09 17:55:41,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:55:41,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522657296] [2020-10-09 17:55:41,277 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 17:55:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:55:41,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:55:41,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:55:41,357 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:55:41,385 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 17:55:41,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:55:41,438 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 17:55:41,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522657296] [2020-10-09 17:55:41,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:55:41,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:55:41,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883551479] [2020-10-09 17:55:41,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:55:41,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:55:41,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:55:41,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:55:41,721 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 82 [2020-10-09 17:55:41,723 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 75 transitions, 346 flow. Second operand 9 states. [2020-10-09 17:55:41,723 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:55:41,723 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 82 [2020-10-09 17:55:41,723 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:55:41,813 INFO L129 PetriNetUnfolder]: 34/185 cut-off events. [2020-10-09 17:55:41,814 INFO L130 PetriNetUnfolder]: For 478/525 co-relation queries the response was YES. [2020-10-09 17:55:41,814 INFO L80 FinitePrefix]: Finished finitePrefix Result has 548 conditions, 185 events. 34/185 cut-off events. For 478/525 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 659 event pairs, 0 based on Foata normal form. 1/176 useless extension candidates. Maximal degree in co-relation 505. Up to 59 conditions per place. [2020-10-09 17:55:41,815 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 9 selfloop transitions, 1 changer transitions 5/80 dead transitions. [2020-10-09 17:55:41,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 80 transitions, 386 flow [2020-10-09 17:55:41,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 17:55:41,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 17:55:41,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 506 transitions. [2020-10-09 17:55:41,818 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8815331010452961 [2020-10-09 17:55:41,818 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 506 transitions. [2020-10-09 17:55:41,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 506 transitions. [2020-10-09 17:55:41,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:55:41,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 506 transitions. [2020-10-09 17:55:41,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 17:55:41,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 17:55:41,822 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 17:55:41,822 INFO L185 Difference]: Start difference. First operand has 103 places, 75 transitions, 346 flow. Second operand 7 states and 506 transitions. [2020-10-09 17:55:41,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 80 transitions, 386 flow [2020-10-09 17:55:41,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 80 transitions, 240 flow, removed 45 selfloop flow, removed 18 redundant places. [2020-10-09 17:55:41,826 INFO L241 Difference]: Finished difference. Result has 90 places, 75 transitions, 213 flow [2020-10-09 17:55:41,826 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=213, PETRI_PLACES=90, PETRI_TRANSITIONS=75} [2020-10-09 17:55:41,827 INFO L341 CegarLoopForPetriNet]: 77 programPoint places, 13 predicate places. [2020-10-09 17:55:41,827 INFO L481 AbstractCegarLoop]: Abstraction has has 90 places, 75 transitions, 213 flow [2020-10-09 17:55:41,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:55:41,827 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:55:41,827 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, 1] [2020-10-09 17:55:42,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-09 17:55:42,040 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:55:42,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:55:42,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1503157140, now seen corresponding path program 2 times [2020-10-09 17:55:42,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:55:42,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901280462] [2020-10-09 17:55:42,042 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 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 17:55:42,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 17:55:42,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 17:55:42,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:55:42,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:55:42,126 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:55:42,153 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 17:55:42,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:55:42,199 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 17:55:42,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901280462] [2020-10-09 17:55:42,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:55:42,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:55:42,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854350851] [2020-10-09 17:55:42,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:55:42,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:55:42,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:55:42,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:55:42,387 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 82 [2020-10-09 17:55:42,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 75 transitions, 213 flow. Second operand 9 states. [2020-10-09 17:55:42,387 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:55:42,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 82 [2020-10-09 17:55:42,388 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:55:42,447 INFO L129 PetriNetUnfolder]: 27/163 cut-off events. [2020-10-09 17:55:42,447 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2020-10-09 17:55:42,448 INFO L80 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 163 events. 27/163 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 571 event pairs, 0 based on Foata normal form. 1/156 useless extension candidates. Maximal degree in co-relation 250. Up to 24 conditions per place. [2020-10-09 17:55:42,448 INFO L132 encePairwiseOnDemand]: 76/82 looper letters, 0 selfloop transitions, 0 changer transitions 74/74 dead transitions. [2020-10-09 17:55:42,449 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 74 transitions, 229 flow [2020-10-09 17:55:42,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 17:55:42,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 17:55:42,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 501 transitions. [2020-10-09 17:55:42,451 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.872822299651568 [2020-10-09 17:55:42,451 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 501 transitions. [2020-10-09 17:55:42,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 501 transitions. [2020-10-09 17:55:42,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:55:42,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 501 transitions. [2020-10-09 17:55:42,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 17:55:42,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 17:55:42,454 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 17:55:42,454 INFO L185 Difference]: Start difference. First operand has 90 places, 75 transitions, 213 flow. Second operand 7 states and 501 transitions. [2020-10-09 17:55:42,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 74 transitions, 229 flow [2020-10-09 17:55:42,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 74 transitions, 222 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-09 17:55:42,456 INFO L241 Difference]: Finished difference. Result has 86 places, 0 transitions, 0 flow [2020-10-09 17:55:42,456 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=86, PETRI_TRANSITIONS=0} [2020-10-09 17:55:42,456 INFO L341 CegarLoopForPetriNet]: 77 programPoint places, 9 predicate places. [2020-10-09 17:55:42,457 INFO L481 AbstractCegarLoop]: Abstraction has has 86 places, 0 transitions, 0 flow [2020-10-09 17:55:42,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:55:42,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-09 17:55:42,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 05:55:42 BasicIcfg [2020-10-09 17:55:42,682 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 17:55:42,685 INFO L168 Benchmark]: Toolchain (without parser) took 7903.20 ms. Allocated memory was 245.9 MB in the beginning and 431.0 MB in the end (delta: 185.1 MB). Free memory was 200.0 MB in the beginning and 299.3 MB in the end (delta: -99.3 MB). Peak memory consumption was 85.8 MB. Max. memory is 14.2 GB. [2020-10-09 17:55:42,685 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 245.9 MB. Free memory is still 222.3 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:55:42,686 INFO L168 Benchmark]: CACSL2BoogieTranslator took 654.19 ms. Allocated memory was 245.9 MB in the beginning and 297.3 MB in the end (delta: 51.4 MB). Free memory was 200.0 MB in the beginning and 250.7 MB in the end (delta: -50.7 MB). Peak memory consumption was 29.3 MB. Max. memory is 14.2 GB. [2020-10-09 17:55:42,687 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.41 ms. Allocated memory is still 297.3 MB. Free memory was 250.7 MB in the beginning and 248.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:55:42,688 INFO L168 Benchmark]: Boogie Preprocessor took 27.72 ms. Allocated memory is still 297.3 MB. Free memory was 248.2 MB in the beginning and 245.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:55:42,688 INFO L168 Benchmark]: RCFGBuilder took 468.06 ms. Allocated memory is still 297.3 MB. Free memory was 245.6 MB in the beginning and 221.3 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 14.2 GB. [2020-10-09 17:55:42,689 INFO L168 Benchmark]: TraceAbstraction took 6695.57 ms. Allocated memory was 297.3 MB in the beginning and 431.0 MB in the end (delta: 133.7 MB). Free memory was 221.3 MB in the beginning and 299.3 MB in the end (delta: -78.0 MB). Peak memory consumption was 55.7 MB. Max. memory is 14.2 GB. [2020-10-09 17:55:42,693 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 245.9 MB. Free memory is still 222.3 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 654.19 ms. Allocated memory was 245.9 MB in the beginning and 297.3 MB in the end (delta: 51.4 MB). Free memory was 200.0 MB in the beginning and 250.7 MB in the end (delta: -50.7 MB). Peak memory consumption was 29.3 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 51.41 ms. Allocated memory is still 297.3 MB. Free memory was 250.7 MB in the beginning and 248.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 27.72 ms. Allocated memory is still 297.3 MB. Free memory was 248.2 MB in the beginning and 245.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 468.06 ms. Allocated memory is still 297.3 MB. Free memory was 245.6 MB in the beginning and 221.3 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 14.2 GB. * TraceAbstraction took 6695.57 ms. Allocated memory was 297.3 MB in the beginning and 431.0 MB in the end (delta: 133.7 MB). Free memory was 221.3 MB in the beginning and 299.3 MB in the end (delta: -78.0 MB). Peak memory consumption was 55.7 MB. 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, 81 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: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 48 SDtfs, 342 SDslu, 664 SDs, 0 SdLazy, 596 SolverSat, 121 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 806 GetRequests, 684 SyntacticMatches, 18 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=346occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 386 NumberOfCodeBlocks, 386 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 756 ConstructedInterpolants, 0 QuantifiedInterpolants, 92354 SizeOfPredicates, 70 NumberOfNonLiveVariables, 1040 ConjunctsInSsa, 58 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...