/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/thin001_pso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 18:14:11,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 18:14:11,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 18:14:11,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 18:14:11,689 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 18:14:11,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 18:14:11,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 18:14:11,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 18:14:11,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 18:14:11,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 18:14:11,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 18:14:11,697 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 18:14:11,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 18:14:11,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 18:14:11,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 18:14:11,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 18:14:11,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 18:14:11,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 18:14:11,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 18:14:11,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 18:14:11,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 18:14:11,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 18:14:11,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 18:14:11,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 18:14:11,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 18:14:11,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 18:14:11,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 18:14:11,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 18:14:11,723 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 18:14:11,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 18:14:11,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 18:14:11,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 18:14:11,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 18:14:11,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 18:14:11,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 18:14:11,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 18:14:11,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 18:14:11,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 18:14:11,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 18:14:11,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 18:14:11,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 18:14:11,744 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 18:14:11,786 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 18:14:11,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 18:14:11,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 18:14:11,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 18:14:11,787 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 18:14:11,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 18:14:11,788 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 18:14:11,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 18:14:11,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 18:14:11,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 18:14:11,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 18:14:11,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 18:14:11,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 18:14:11,790 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 18:14:11,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 18:14:11,790 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 18:14:11,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 18:14:11,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 18:14:11,791 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 18:14:11,791 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 18:14:11,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 18:14:11,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 18:14:11,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 18:14:11,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 18:14:11,792 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 18:14:11,792 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 18:14:11,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 18:14:11,793 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 18:14:11,793 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 18:14:11,793 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 18:14:12,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 18:14:12,086 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 18:14:12,090 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 18:14:12,091 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 18:14:12,092 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 18:14:12,092 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/thin001_pso.opt.i [2020-10-09 18:14:12,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9959b5a8/fdfd9c956062467b932ca28e2f858d13/FLAG0d4bde63b [2020-10-09 18:14:12,694 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 18:14:12,694 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin001_pso.opt.i [2020-10-09 18:14:12,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9959b5a8/fdfd9c956062467b932ca28e2f858d13/FLAG0d4bde63b [2020-10-09 18:14:13,044 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9959b5a8/fdfd9c956062467b932ca28e2f858d13 [2020-10-09 18:14:13,054 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 18:14:13,056 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 18:14:13,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 18:14:13,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 18:14:13,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 18:14:13,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 06:14:13" (1/1) ... [2020-10-09 18:14:13,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@416d0f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:14:13, skipping insertion in model container [2020-10-09 18:14:13,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 06:14:13" (1/1) ... [2020-10-09 18:14:13,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 18:14:13,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 18:14:13,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 18:14:13,580 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 18:14:13,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 18:14:13,714 INFO L208 MainTranslator]: Completed translation [2020-10-09 18:14:13,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:14:13 WrapperNode [2020-10-09 18:14:13,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 18:14:13,716 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 18:14:13,716 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 18:14:13,717 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 18:14:13,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:14:13" (1/1) ... [2020-10-09 18:14:13,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:14:13" (1/1) ... [2020-10-09 18:14:13,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 18:14:13,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 18:14:13,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 18:14:13,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 18:14:13,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:14:13" (1/1) ... [2020-10-09 18:14:13,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:14:13" (1/1) ... [2020-10-09 18:14:13,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:14:13" (1/1) ... [2020-10-09 18:14:13,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:14:13" (1/1) ... [2020-10-09 18:14:13,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:14:13" (1/1) ... [2020-10-09 18:14:13,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:14:13" (1/1) ... [2020-10-09 18:14:13,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:14:13" (1/1) ... [2020-10-09 18:14:13,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 18:14:13,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 18:14:13,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 18:14:13,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 18:14:13,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:14:13" (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 18:14:13,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 18:14:13,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 18:14:13,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 18:14:13,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 18:14:13,861 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-09 18:14:13,861 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-09 18:14:13,861 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-09 18:14:13,861 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-09 18:14:13,862 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-09 18:14:13,862 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-09 18:14:13,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 18:14:13,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 18:14:13,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 18:14:13,864 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 18:14:14,248 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 18:14:14,248 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-09 18:14:14,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 06:14:14 BoogieIcfgContainer [2020-10-09 18:14:14,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 18:14:14,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 18:14:14,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 18:14:14,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 18:14:14,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 06:14:13" (1/3) ... [2020-10-09 18:14:14,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@645aaa27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 06:14:14, skipping insertion in model container [2020-10-09 18:14:14,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:14:13" (2/3) ... [2020-10-09 18:14:14,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@645aaa27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 06:14:14, skipping insertion in model container [2020-10-09 18:14:14,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 06:14:14" (3/3) ... [2020-10-09 18:14:14,259 INFO L111 eAbstractionObserver]: Analyzing ICFG thin001_pso.opt.i [2020-10-09 18:14:14,271 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 18:14:14,278 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 18:14:14,278 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 18:14:14,304 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,304 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,304 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,304 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,305 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,305 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,306 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,306 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,306 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,306 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,307 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,307 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,308 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,308 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,308 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,308 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,309 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,309 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,313 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,313 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,313 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,313 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,319 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,319 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,320 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,320 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,332 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,332 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,333 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,333 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:14:14,350 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-09 18:14:14,370 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 18:14:14,370 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 18:14:14,370 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 18:14:14,370 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 18:14:14,370 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 18:14:14,370 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 18:14:14,370 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 18:14:14,371 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 18:14:14,383 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 79 places, 71 transitions, 157 flow [2020-10-09 18:14:14,425 INFO L129 PetriNetUnfolder]: 2/68 cut-off events. [2020-10-09 18:14:14,426 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 18:14:14,431 INFO L80 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 68 events. 2/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2020-10-09 18:14:14,431 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 71 transitions, 157 flow [2020-10-09 18:14:14,437 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 57 transitions, 123 flow [2020-10-09 18:14:14,464 INFO L129 PetriNetUnfolder]: 1/56 cut-off events. [2020-10-09 18:14:14,464 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 18:14:14,465 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:14:14,466 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] [2020-10-09 18:14:14,466 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:14:14,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:14:14,472 INFO L82 PathProgramCache]: Analyzing trace with hash 642340523, now seen corresponding path program 1 times [2020-10-09 18:14:14,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:14:14,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160457158] [2020-10-09 18:14:14,487 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 18:14:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:14:14,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 18:14:14,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:14:14,744 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 18:14:14,801 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 18:14:14,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:14:14,872 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 18:14:14,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160457158] [2020-10-09 18:14:14,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:14:14,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 18:14:14,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811851735] [2020-10-09 18:14:14,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 18:14:14,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:14:14,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 18:14:14,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 18:14:15,132 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 71 [2020-10-09 18:14:15,137 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 123 flow. Second operand 8 states. [2020-10-09 18:14:15,137 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:14:15,137 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 71 [2020-10-09 18:14:15,139 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:14:15,258 INFO L129 PetriNetUnfolder]: 3/79 cut-off events. [2020-10-09 18:14:15,259 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 18:14:15,260 INFO L80 FinitePrefix]: Finished finitePrefix Result has 109 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 121 event pairs, 0 based on Foata normal form. 4/82 useless extension candidates. Maximal degree in co-relation 83. Up to 7 conditions per place. [2020-10-09 18:14:15,261 INFO L132 encePairwiseOnDemand]: 64/71 looper letters, 6 selfloop transitions, 2 changer transitions 11/66 dead transitions. [2020-10-09 18:14:15,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 66 transitions, 177 flow [2020-10-09 18:14:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 18:14:15,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 18:14:15,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 571 transitions. [2020-10-09 18:14:15,279 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8935837245696401 [2020-10-09 18:14:15,280 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 571 transitions. [2020-10-09 18:14:15,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 571 transitions. [2020-10-09 18:14:15,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:14:15,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 571 transitions. [2020-10-09 18:14:15,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 18:14:15,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 18:14:15,301 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 18:14:15,303 INFO L185 Difference]: Start difference. First operand has 66 places, 57 transitions, 123 flow. Second operand 9 states and 571 transitions. [2020-10-09 18:14:15,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 66 transitions, 177 flow [2020-10-09 18:14:15,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 66 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 18:14:15,316 INFO L241 Difference]: Finished difference. Result has 78 places, 55 transitions, 136 flow [2020-10-09 18:14:15,319 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=136, PETRI_PLACES=78, PETRI_TRANSITIONS=55} [2020-10-09 18:14:15,319 INFO L341 CegarLoopForPetriNet]: 66 programPoint places, 12 predicate places. [2020-10-09 18:14:15,320 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 55 transitions, 136 flow [2020-10-09 18:14:15,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 18:14:15,320 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:14:15,322 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] [2020-10-09 18:14:15,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 18:14:15,542 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:14:15,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:14:15,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1160241260, now seen corresponding path program 1 times [2020-10-09 18:14:15,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:14:15,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588407279] [2020-10-09 18:14:15,545 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 18:14:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:14:15,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 18:14:15,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:14:15,659 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 18:14:15,706 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 18:14:15,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:14:15,773 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 18:14:15,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588407279] [2020-10-09 18:14:15,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:14:15,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 18:14:15,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879111955] [2020-10-09 18:14:15,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 18:14:15,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:14:15,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 18:14:15,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 18:14:15,937 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 71 [2020-10-09 18:14:15,938 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 55 transitions, 136 flow. Second operand 8 states. [2020-10-09 18:14:15,938 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:14:15,938 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 71 [2020-10-09 18:14:15,938 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:14:16,042 INFO L129 PetriNetUnfolder]: 3/78 cut-off events. [2020-10-09 18:14:16,042 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2020-10-09 18:14:16,043 INFO L80 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 78 events. 3/78 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 117 event pairs, 0 based on Foata normal form. 2/80 useless extension candidates. Maximal degree in co-relation 117. Up to 7 conditions per place. [2020-10-09 18:14:16,044 INFO L132 encePairwiseOnDemand]: 65/71 looper letters, 6 selfloop transitions, 2 changer transitions 10/65 dead transitions. [2020-10-09 18:14:16,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 65 transitions, 210 flow [2020-10-09 18:14:16,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 18:14:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 18:14:16,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 569 transitions. [2020-10-09 18:14:16,049 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8904538341158059 [2020-10-09 18:14:16,049 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 569 transitions. [2020-10-09 18:14:16,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 569 transitions. [2020-10-09 18:14:16,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:14:16,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 569 transitions. [2020-10-09 18:14:16,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 18:14:16,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 18:14:16,055 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 18:14:16,055 INFO L185 Difference]: Start difference. First operand has 78 places, 55 transitions, 136 flow. Second operand 9 states and 569 transitions. [2020-10-09 18:14:16,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 65 transitions, 210 flow [2020-10-09 18:14:16,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 65 transitions, 178 flow, removed 14 selfloop flow, removed 8 redundant places. [2020-10-09 18:14:16,061 INFO L241 Difference]: Finished difference. Result has 78 places, 55 transitions, 140 flow [2020-10-09 18:14:16,061 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=140, PETRI_PLACES=78, PETRI_TRANSITIONS=55} [2020-10-09 18:14:16,062 INFO L341 CegarLoopForPetriNet]: 66 programPoint places, 12 predicate places. [2020-10-09 18:14:16,062 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 55 transitions, 140 flow [2020-10-09 18:14:16,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 18:14:16,063 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:14:16,063 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 18:14:16,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 18:14:16,273 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:14:16,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:14:16,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1372231315, now seen corresponding path program 1 times [2020-10-09 18:14:16,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:14:16,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1972471319] [2020-10-09 18:14:16,276 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 18:14:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:14:16,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 18:14:16,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:14:16,355 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 18:14:16,378 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 18:14:16,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:14:16,424 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 18:14:16,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1972471319] [2020-10-09 18:14:16,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:14:16,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 18:14:16,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525534088] [2020-10-09 18:14:16,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 18:14:16,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:14:16,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 18:14:16,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 18:14:16,560 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 71 [2020-10-09 18:14:16,561 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 55 transitions, 140 flow. Second operand 8 states. [2020-10-09 18:14:16,561 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:14:16,562 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 71 [2020-10-09 18:14:16,562 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:14:16,646 INFO L129 PetriNetUnfolder]: 3/78 cut-off events. [2020-10-09 18:14:16,646 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2020-10-09 18:14:16,647 INFO L80 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 78 events. 3/78 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 117 event pairs, 0 based on Foata normal form. 2/80 useless extension candidates. Maximal degree in co-relation 120. Up to 7 conditions per place. [2020-10-09 18:14:16,648 INFO L132 encePairwiseOnDemand]: 65/71 looper letters, 6 selfloop transitions, 2 changer transitions 10/65 dead transitions. [2020-10-09 18:14:16,648 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 65 transitions, 216 flow [2020-10-09 18:14:16,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 18:14:16,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 18:14:16,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 569 transitions. [2020-10-09 18:14:16,651 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8904538341158059 [2020-10-09 18:14:16,651 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 569 transitions. [2020-10-09 18:14:16,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 569 transitions. [2020-10-09 18:14:16,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:14:16,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 569 transitions. [2020-10-09 18:14:16,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 18:14:16,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 18:14:16,656 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 18:14:16,656 INFO L185 Difference]: Start difference. First operand has 78 places, 55 transitions, 140 flow. Second operand 9 states and 569 transitions. [2020-10-09 18:14:16,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 65 transitions, 216 flow [2020-10-09 18:14:16,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 65 transitions, 184 flow, removed 14 selfloop flow, removed 8 redundant places. [2020-10-09 18:14:16,660 INFO L241 Difference]: Finished difference. Result has 79 places, 55 transitions, 144 flow [2020-10-09 18:14:16,660 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=144, PETRI_PLACES=79, PETRI_TRANSITIONS=55} [2020-10-09 18:14:16,661 INFO L341 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2020-10-09 18:14:16,661 INFO L481 AbstractCegarLoop]: Abstraction has has 79 places, 55 transitions, 144 flow [2020-10-09 18:14:16,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 18:14:16,661 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:14:16,661 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 18:14:16,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 18:14:16,876 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:14:16,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:14:16,876 INFO L82 PathProgramCache]: Analyzing trace with hash -699810066, now seen corresponding path program 1 times [2020-10-09 18:14:16,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:14:16,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279412993] [2020-10-09 18:14:16,877 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 18:14:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:14:16,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 18:14:16,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:14:16,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 18:14:17,021 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 18:14:17,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:14:17,080 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 18:14:17,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279412993] [2020-10-09 18:14:17,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:14:17,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 18:14:17,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060225802] [2020-10-09 18:14:17,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 18:14:17,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:14:17,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 18:14:17,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 18:14:17,315 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 71 [2020-10-09 18:14:17,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 55 transitions, 144 flow. Second operand 9 states. [2020-10-09 18:14:17,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:14:17,316 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 71 [2020-10-09 18:14:17,316 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:14:17,462 INFO L129 PetriNetUnfolder]: 4/76 cut-off events. [2020-10-09 18:14:17,463 INFO L130 PetriNetUnfolder]: For 34/41 co-relation queries the response was YES. [2020-10-09 18:14:17,463 INFO L80 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 76 events. 4/76 cut-off events. For 34/41 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 129 event pairs, 0 based on Foata normal form. 2/78 useless extension candidates. Maximal degree in co-relation 131. Up to 7 conditions per place. [2020-10-09 18:14:17,464 INFO L132 encePairwiseOnDemand]: 63/71 looper letters, 6 selfloop transitions, 4 changer transitions 12/67 dead transitions. [2020-10-09 18:14:17,466 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 67 transitions, 243 flow [2020-10-09 18:14:17,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 18:14:17,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 18:14:17,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 614 transitions. [2020-10-09 18:14:17,472 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8647887323943662 [2020-10-09 18:14:17,472 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 614 transitions. [2020-10-09 18:14:17,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 614 transitions. [2020-10-09 18:14:17,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:14:17,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 614 transitions. [2020-10-09 18:14:17,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 18:14:17,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 18:14:17,481 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 18:14:17,481 INFO L185 Difference]: Start difference. First operand has 79 places, 55 transitions, 144 flow. Second operand 10 states and 614 transitions. [2020-10-09 18:14:17,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 67 transitions, 243 flow [2020-10-09 18:14:17,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 67 transitions, 209 flow, removed 14 selfloop flow, removed 8 redundant places. [2020-10-09 18:14:17,484 INFO L241 Difference]: Finished difference. Result has 82 places, 55 transitions, 158 flow [2020-10-09 18:14:17,484 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=158, PETRI_PLACES=82, PETRI_TRANSITIONS=55} [2020-10-09 18:14:17,485 INFO L341 CegarLoopForPetriNet]: 66 programPoint places, 16 predicate places. [2020-10-09 18:14:17,485 INFO L481 AbstractCegarLoop]: Abstraction has has 82 places, 55 transitions, 158 flow [2020-10-09 18:14:17,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 18:14:17,485 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:14:17,485 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 18:14:17,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 18:14:17,705 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:14:17,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:14:17,706 INFO L82 PathProgramCache]: Analyzing trace with hash 418548482, now seen corresponding path program 1 times [2020-10-09 18:14:17,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:14:17,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617415049] [2020-10-09 18:14:17,707 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 18:14:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:14:17,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 18:14:17,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:14:17,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 18:14:17,820 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 18:14:17,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:14:17,871 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 18:14:17,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617415049] [2020-10-09 18:14:17,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:14:17,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 18:14:17,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338550578] [2020-10-09 18:14:17,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 18:14:17,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:14:17,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 18:14:17,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 18:14:18,050 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 71 [2020-10-09 18:14:18,051 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 55 transitions, 158 flow. Second operand 9 states. [2020-10-09 18:14:18,051 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:14:18,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 71 [2020-10-09 18:14:18,051 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:14:18,186 INFO L129 PetriNetUnfolder]: 4/81 cut-off events. [2020-10-09 18:14:18,186 INFO L130 PetriNetUnfolder]: For 61/73 co-relation queries the response was YES. [2020-10-09 18:14:18,188 INFO L80 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 81 events. 4/81 cut-off events. For 61/73 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 145 event pairs, 0 based on Foata normal form. 3/83 useless extension candidates. Maximal degree in co-relation 151. Up to 7 conditions per place. [2020-10-09 18:14:18,188 INFO L132 encePairwiseOnDemand]: 63/71 looper letters, 6 selfloop transitions, 4 changer transitions 12/67 dead transitions. [2020-10-09 18:14:18,189 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 67 transitions, 263 flow [2020-10-09 18:14:18,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 18:14:18,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 18:14:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 614 transitions. [2020-10-09 18:14:18,192 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8647887323943662 [2020-10-09 18:14:18,192 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 614 transitions. [2020-10-09 18:14:18,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 614 transitions. [2020-10-09 18:14:18,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:14:18,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 614 transitions. [2020-10-09 18:14:18,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 18:14:18,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 18:14:18,197 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 18:14:18,197 INFO L185 Difference]: Start difference. First operand has 82 places, 55 transitions, 158 flow. Second operand 10 states and 614 transitions. [2020-10-09 18:14:18,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 67 transitions, 263 flow [2020-10-09 18:14:18,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 67 transitions, 213 flow, removed 20 selfloop flow, removed 10 redundant places. [2020-10-09 18:14:18,200 INFO L241 Difference]: Finished difference. Result has 83 places, 55 transitions, 162 flow [2020-10-09 18:14:18,201 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=162, PETRI_PLACES=83, PETRI_TRANSITIONS=55} [2020-10-09 18:14:18,201 INFO L341 CegarLoopForPetriNet]: 66 programPoint places, 17 predicate places. [2020-10-09 18:14:18,201 INFO L481 AbstractCegarLoop]: Abstraction has has 83 places, 55 transitions, 162 flow [2020-10-09 18:14:18,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 18:14:18,201 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:14:18,202 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 18:14:18,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 18:14:18,414 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:14:18,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:14:18,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1916680376, now seen corresponding path program 1 times [2020-10-09 18:14:18,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:14:18,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225276093] [2020-10-09 18:14:18,415 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 18:14:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:14:18,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 18:14:18,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:14:18,483 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 18:14:18,508 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 18:14:18,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:14:18,555 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 18:14:18,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225276093] [2020-10-09 18:14:18,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:14:18,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 18:14:18,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734766722] [2020-10-09 18:14:18,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 18:14:18,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:14:18,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 18:14:18,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 18:14:18,729 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 71 [2020-10-09 18:14:18,729 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 55 transitions, 162 flow. Second operand 9 states. [2020-10-09 18:14:18,729 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:14:18,729 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 71 [2020-10-09 18:14:18,730 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:14:18,826 INFO L129 PetriNetUnfolder]: 4/61 cut-off events. [2020-10-09 18:14:18,826 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2020-10-09 18:14:18,827 INFO L80 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 61 events. 4/61 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 51 event pairs, 0 based on Foata normal form. 2/63 useless extension candidates. Maximal degree in co-relation 114. Up to 5 conditions per place. [2020-10-09 18:14:18,827 INFO L132 encePairwiseOnDemand]: 64/71 looper letters, 0 selfloop transitions, 0 changer transitions 60/60 dead transitions. [2020-10-09 18:14:18,827 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 60 transitions, 218 flow [2020-10-09 18:14:18,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 18:14:18,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 18:14:18,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 608 transitions. [2020-10-09 18:14:18,836 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.856338028169014 [2020-10-09 18:14:18,836 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 608 transitions. [2020-10-09 18:14:18,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 608 transitions. [2020-10-09 18:14:18,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:14:18,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 608 transitions. [2020-10-09 18:14:18,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 18:14:18,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 18:14:18,841 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 18:14:18,841 INFO L185 Difference]: Start difference. First operand has 83 places, 55 transitions, 162 flow. Second operand 10 states and 608 transitions. [2020-10-09 18:14:18,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 60 transitions, 218 flow [2020-10-09 18:14:18,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 60 transitions, 178 flow, removed 14 selfloop flow, removed 9 redundant places. [2020-10-09 18:14:18,847 INFO L241 Difference]: Finished difference. Result has 75 places, 0 transitions, 0 flow [2020-10-09 18:14:18,847 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=75, PETRI_TRANSITIONS=0} [2020-10-09 18:14:18,847 INFO L341 CegarLoopForPetriNet]: 66 programPoint places, 9 predicate places. [2020-10-09 18:14:18,848 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 0 transitions, 0 flow [2020-10-09 18:14:18,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 18:14:19,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-09 18:14:19,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 06:14:19 BasicIcfg [2020-10-09 18:14:19,074 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 18:14:19,077 INFO L168 Benchmark]: Toolchain (without parser) took 6020.31 ms. Allocated memory was 252.2 MB in the beginning and 422.1 MB in the end (delta: 169.9 MB). Free memory was 207.2 MB in the beginning and 305.1 MB in the end (delta: -97.9 MB). Peak memory consumption was 72.0 MB. Max. memory is 14.2 GB. [2020-10-09 18:14:19,077 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 252.2 MB. Free memory is still 228.6 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 18:14:19,078 INFO L168 Benchmark]: CACSL2BoogieTranslator took 658.16 ms. Allocated memory was 252.2 MB in the beginning and 315.6 MB in the end (delta: 63.4 MB). Free memory was 207.2 MB in the beginning and 266.6 MB in the end (delta: -59.3 MB). Peak memory consumption was 26.7 MB. Max. memory is 14.2 GB. [2020-10-09 18:14:19,079 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.94 ms. Allocated memory is still 315.6 MB. Free memory was 266.6 MB in the beginning and 264.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 18:14:19,080 INFO L168 Benchmark]: Boogie Preprocessor took 26.76 ms. Allocated memory is still 315.6 MB. Free memory was 264.0 MB in the beginning and 261.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 18:14:19,081 INFO L168 Benchmark]: RCFGBuilder took 459.60 ms. Allocated memory is still 315.6 MB. Free memory was 261.5 MB in the beginning and 239.7 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 14.2 GB. [2020-10-09 18:14:19,082 INFO L168 Benchmark]: TraceAbstraction took 4821.90 ms. Allocated memory was 315.6 MB in the beginning and 422.1 MB in the end (delta: 106.4 MB). Free memory was 239.7 MB in the beginning and 305.1 MB in the end (delta: -65.5 MB). Peak memory consumption was 41.0 MB. Max. memory is 14.2 GB. [2020-10-09 18:14:19,086 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 252.2 MB. Free memory is still 228.6 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 658.16 ms. Allocated memory was 252.2 MB in the beginning and 315.6 MB in the end (delta: 63.4 MB). Free memory was 207.2 MB in the beginning and 266.6 MB in the end (delta: -59.3 MB). Peak memory consumption was 26.7 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 47.94 ms. Allocated memory is still 315.6 MB. Free memory was 266.6 MB in the beginning and 264.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 26.76 ms. Allocated memory is still 315.6 MB. Free memory was 264.0 MB in the beginning and 261.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 459.60 ms. Allocated memory is still 315.6 MB. Free memory was 261.5 MB in the beginning and 239.7 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 14.2 GB. * TraceAbstraction took 4821.90 ms. Allocated memory was 315.6 MB in the beginning and 422.1 MB in the end (delta: 106.4 MB). Free memory was 239.7 MB in the beginning and 305.1 MB in the end (delta: -65.5 MB). Peak memory consumption was 41.0 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 4 procedures, 70 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 49 SDtfs, 228 SDslu, 474 SDs, 0 SdLazy, 339 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 522 GetRequests, 432 SyntacticMatches, 15 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 249 NumberOfCodeBlocks, 249 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 486 ConstructedInterpolants, 0 QuantifiedInterpolants, 56612 SizeOfPredicates, 51 NumberOfNonLiveVariables, 642 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 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...