/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/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread-atomic/gcd-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 00:01:07,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 00:01:07,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 00:01:07,711 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 00:01:07,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 00:01:07,723 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 00:01:07,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 00:01:07,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 00:01:07,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 00:01:07,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 00:01:07,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 00:01:07,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 00:01:07,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 00:01:07,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 00:01:07,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 00:01:07,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 00:01:07,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 00:01:07,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 00:01:07,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 00:01:07,750 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 00:01:07,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 00:01:07,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 00:01:07,755 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 00:01:07,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 00:01:07,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 00:01:07,766 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 00:01:07,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 00:01:07,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 00:01:07,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 00:01:07,771 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 00:01:07,771 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 00:01:07,772 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 00:01:07,772 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 00:01:07,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 00:01:07,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 00:01:07,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 00:01:07,776 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2020-10-16 00:01:07,818 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 00:01:07,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 00:01:07,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 00:01:07,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 00:01:07,820 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 00:01:07,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 00:01:07,820 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 00:01:07,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 00:01:07,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 00:01:07,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 00:01:07,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 00:01:07,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 00:01:07,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 00:01:07,822 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 00:01:07,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 00:01:07,823 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 00:01:07,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 00:01:07,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 00:01:07,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 00:01:07,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 00:01:07,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 00:01:07,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 00:01:07,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 00:01:07,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 00:01:07,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 00:01:07,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 00:01:07,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 00:01:07,825 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 00:01:07,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 00:01:08,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 00:01:08,109 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 00:01:08,113 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 00:01:08,114 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 00:01:08,114 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 00:01:08,115 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/gcd-2.i [2020-10-16 00:01:08,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d08897631/debe45d2055f4a1ea82d5a280377be1a/FLAG5de6fb422 [2020-10-16 00:01:08,669 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 00:01:08,669 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/gcd-2.i [2020-10-16 00:01:08,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d08897631/debe45d2055f4a1ea82d5a280377be1a/FLAG5de6fb422 [2020-10-16 00:01:08,956 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d08897631/debe45d2055f4a1ea82d5a280377be1a [2020-10-16 00:01:08,964 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 00:01:08,966 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 00:01:08,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 00:01:08,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 00:01:08,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 00:01:08,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:01:08" (1/1) ... [2020-10-16 00:01:08,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13249dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:01:08, skipping insertion in model container [2020-10-16 00:01:08,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:01:08" (1/1) ... [2020-10-16 00:01:08,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 00:01:09,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 00:01:09,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 00:01:09,500 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 00:01:09,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 00:01:09,650 INFO L208 MainTranslator]: Completed translation [2020-10-16 00:01:09,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:01:09 WrapperNode [2020-10-16 00:01:09,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 00:01:09,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 00:01:09,654 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 00:01:09,654 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 00:01:09,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:01:09" (1/1) ... [2020-10-16 00:01:09,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:01:09" (1/1) ... [2020-10-16 00:01:09,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 00:01:09,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 00:01:09,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 00:01:09,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 00:01:09,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:01:09" (1/1) ... [2020-10-16 00:01:09,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:01:09" (1/1) ... [2020-10-16 00:01:09,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:01:09" (1/1) ... [2020-10-16 00:01:09,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:01:09" (1/1) ... [2020-10-16 00:01:09,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:01:09" (1/1) ... [2020-10-16 00:01:09,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:01:09" (1/1) ... [2020-10-16 00:01:09,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:01:09" (1/1) ... [2020-10-16 00:01:09,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 00:01:09,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 00:01:09,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 00:01:09,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 00:01:09,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:01:09" (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 [2020-10-16 00:01:09,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-16 00:01:09,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 00:01:09,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 00:01:09,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 00:01:09,825 INFO L130 BoogieDeclarations]: Found specification of procedure dec_a [2020-10-16 00:01:09,825 INFO L138 BoogieDeclarations]: Found implementation of procedure dec_a [2020-10-16 00:01:09,825 INFO L130 BoogieDeclarations]: Found specification of procedure dec_b [2020-10-16 00:01:09,826 INFO L138 BoogieDeclarations]: Found implementation of procedure dec_b [2020-10-16 00:01:09,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 00:01:09,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 00:01:09,828 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 00:01:10,368 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 00:01:10,369 INFO L298 CfgBuilder]: Removed 26 assume(true) statements. [2020-10-16 00:01:10,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:01:10 BoogieIcfgContainer [2020-10-16 00:01:10,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 00:01:10,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 00:01:10,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 00:01:10,377 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 00:01:10,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 12:01:08" (1/3) ... [2020-10-16 00:01:10,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec44964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:01:10, skipping insertion in model container [2020-10-16 00:01:10,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:01:09" (2/3) ... [2020-10-16 00:01:10,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec44964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:01:10, skipping insertion in model container [2020-10-16 00:01:10,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:01:10" (3/3) ... [2020-10-16 00:01:10,380 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd-2.i [2020-10-16 00:01:10,393 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 00:01:10,401 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-10-16 00:01:10,402 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 00:01:10,428 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:01:10,428 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:01:10,428 WARN L313 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:01:10,428 WARN L313 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:01:10,429 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:01:10,429 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:01:10,430 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:01:10,430 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:01:10,430 WARN L313 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:01:10,431 WARN L313 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:01:10,431 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:01:10,431 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:01:10,435 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:01:10,435 WARN L313 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:01:10,436 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:01:10,436 WARN L313 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:01:10,439 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:01:10,439 WARN L313 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:01:10,439 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:01:10,440 WARN L313 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:01:10,462 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-10-16 00:01:10,484 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 00:01:10,484 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 00:01:10,485 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 00:01:10,485 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 00:01:10,485 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 00:01:10,485 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 00:01:10,485 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 00:01:10,486 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 00:01:10,502 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 111 places, 118 transitions, 258 flow [2020-10-16 00:01:10,558 INFO L129 PetriNetUnfolder]: 13/118 cut-off events. [2020-10-16 00:01:10,559 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-16 00:01:10,563 INFO L80 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 118 events. 13/118 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 57 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 68. Up to 3 conditions per place. [2020-10-16 00:01:10,564 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 118 transitions, 258 flow [2020-10-16 00:01:10,571 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 110 transitions, 238 flow [2020-10-16 00:01:10,573 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 00:01:10,576 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 110 transitions, 238 flow [2020-10-16 00:01:10,579 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 110 transitions, 238 flow [2020-10-16 00:01:10,580 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 104 places, 110 transitions, 238 flow [2020-10-16 00:01:10,609 INFO L129 PetriNetUnfolder]: 12/112 cut-off events. [2020-10-16 00:01:10,609 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-16 00:01:10,610 INFO L80 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 112 events. 12/112 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 62. Up to 3 conditions per place. [2020-10-16 00:01:10,612 INFO L117 LiptonReduction]: Number of co-enabled transitions 280 [2020-10-16 00:01:14,113 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-10-16 00:01:14,906 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-10-16 00:01:15,052 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-10-16 00:01:15,544 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-10-16 00:01:15,808 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-10-16 00:01:15,980 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-10-16 00:01:17,380 WARN L193 SmtUtils]: Spent 989.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2020-10-16 00:01:17,943 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-16 00:01:18,265 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-10-16 00:01:18,505 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-10-16 00:01:18,812 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-10-16 00:01:19,759 WARN L193 SmtUtils]: Spent 843.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-10-16 00:01:20,967 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 50 [2020-10-16 00:01:22,097 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-16 00:01:22,448 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-16 00:01:24,581 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-16 00:01:25,331 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-16 00:01:27,270 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-16 00:01:27,790 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-16 00:01:27,796 INFO L132 LiptonReduction]: Checked pairs total: 1083 [2020-10-16 00:01:27,796 INFO L134 LiptonReduction]: Total number of compositions: 122 [2020-10-16 00:01:27,799 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 17228 [2020-10-16 00:01:27,807 INFO L129 PetriNetUnfolder]: 3/22 cut-off events. [2020-10-16 00:01:27,808 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-16 00:01:27,808 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:27,809 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:27,809 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:27,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:27,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1558954724, now seen corresponding path program 1 times [2020-10-16 00:01:27,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:27,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340199449] [2020-10-16 00:01:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:01:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:01:28,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340199449] [2020-10-16 00:01:28,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 00:01:28,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-16 00:01:28,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5979356] [2020-10-16 00:01:28,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 00:01:28,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:01:28,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 00:01:28,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-16 00:01:28,126 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 240 [2020-10-16 00:01:28,132 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 64 flow. Second operand 5 states. [2020-10-16 00:01:28,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:01:28,132 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 240 [2020-10-16 00:01:28,134 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:01:28,493 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2020-10-16 00:01:28,493 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-16 00:01:28,496 INFO L80 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 24 events. 2/24 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 23 event pairs, 0 based on Foata normal form. 1/21 useless extension candidates. Maximal degree in co-relation 20. Up to 4 conditions per place. [2020-10-16 00:01:28,497 INFO L132 encePairwiseOnDemand]: 232/240 looper letters, 4 selfloop transitions, 7 changer transitions 0/22 dead transitions. [2020-10-16 00:01:28,497 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 22 transitions, 81 flow [2020-10-16 00:01:28,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 00:01:28,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 00:01:28,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 862 transitions. [2020-10-16 00:01:28,534 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7183333333333334 [2020-10-16 00:01:28,535 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 862 transitions. [2020-10-16 00:01:28,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 862 transitions. [2020-10-16 00:01:28,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:01:28,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 862 transitions. [2020-10-16 00:01:28,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 00:01:28,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 00:01:28,557 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 00:01:28,559 INFO L185 Difference]: Start difference. First operand has 26 places, 23 transitions, 64 flow. Second operand 5 states and 862 transitions. [2020-10-16 00:01:28,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 22 transitions, 81 flow [2020-10-16 00:01:28,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 22 transitions, 71 flow, removed 0 selfloop flow, removed 4 redundant places. [2020-10-16 00:01:28,565 INFO L241 Difference]: Finished difference. Result has 26 places, 22 transitions, 63 flow [2020-10-16 00:01:28,568 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=63, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2020-10-16 00:01:28,569 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 0 predicate places. [2020-10-16 00:01:28,569 INFO L481 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 63 flow [2020-10-16 00:01:28,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 00:01:28,570 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:01:28,570 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:01:28,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 00:01:28,570 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:01:28,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:01:28,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1339030936, now seen corresponding path program 1 times [2020-10-16 00:01:28,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:01:28,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642200751] [2020-10-16 00:01:28,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:01:28,613 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-16 00:01:28,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436132297] [2020-10-16 00:01:28,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown