/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-ext/23_lu-fig2.fixed.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 17:23:24,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 17:23:24,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 17:23:24,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 17:23:24,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 17:23:24,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 17:23:24,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 17:23:24,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 17:23:24,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 17:23:24,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 17:23:24,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 17:23:24,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 17:23:24,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 17:23:24,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 17:23:24,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 17:23:24,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 17:23:24,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 17:23:24,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 17:23:24,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 17:23:24,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 17:23:24,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 17:23:24,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 17:23:24,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 17:23:24,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 17:23:24,705 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-11 17:23:24,705 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-11 17:23:24,705 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-11 17:23:24,706 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-11 17:23:24,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-11 17:23:24,707 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-11 17:23:24,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 17:23:24,708 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 17:23:24,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 17:23:24,709 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 17:23:24,710 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 17:23:24,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 17:23:24,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 17:23:24,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 17:23:24,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 17:23:24,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 17:23:24,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 17:23:24,714 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-11 17:23:24,738 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 17:23:24,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 17:23:24,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 17:23:24,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 17:23:24,740 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 17:23:24,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 17:23:24,740 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 17:23:24,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 17:23:24,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 17:23:24,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 17:23:24,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 17:23:24,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 17:23:24,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 17:23:24,742 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 17:23:24,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 17:23:24,742 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 17:23:24,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 17:23:24,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 17:23:24,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 17:23:24,743 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 17:23:24,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 17:23:24,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 17:23:24,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 17:23:24,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 17:23:24,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 17:23:24,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 17:23:24,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 17:23:24,745 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-11 17:23:24,745 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-11 17:23:24,745 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 17:23:25,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 17:23:25,048 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 17:23:25,052 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 17:23:25,053 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 17:23:25,053 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 17:23:25,054 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/23_lu-fig2.fixed.i [2020-10-11 17:23:25,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5492be25c/3c505d8f724a471298a93a9115ce7441/FLAG4fc69580a [2020-10-11 17:23:25,561 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 17:23:25,562 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/23_lu-fig2.fixed.i [2020-10-11 17:23:25,574 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5492be25c/3c505d8f724a471298a93a9115ce7441/FLAG4fc69580a [2020-10-11 17:23:25,859 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5492be25c/3c505d8f724a471298a93a9115ce7441 [2020-10-11 17:23:25,868 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 17:23:25,870 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 17:23:25,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 17:23:25,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 17:23:25,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 17:23:25,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 05:23:25" (1/1) ... [2020-10-11 17:23:25,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@698df780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:25, skipping insertion in model container [2020-10-11 17:23:25,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 05:23:25" (1/1) ... [2020-10-11 17:23:25,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 17:23:25,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 17:23:26,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 17:23:26,426 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 17:23:26,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 17:23:26,543 INFO L208 MainTranslator]: Completed translation [2020-10-11 17:23:26,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:26 WrapperNode [2020-10-11 17:23:26,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 17:23:26,544 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 17:23:26,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 17:23:26,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 17:23:26,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:26" (1/1) ... [2020-10-11 17:23:26,569 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:26" (1/1) ... [2020-10-11 17:23:26,599 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 17:23:26,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 17:23:26,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 17:23:26,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 17:23:26,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:26" (1/1) ... [2020-10-11 17:23:26,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:26" (1/1) ... [2020-10-11 17:23:26,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:26" (1/1) ... [2020-10-11 17:23:26,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:26" (1/1) ... [2020-10-11 17:23:26,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:26" (1/1) ... [2020-10-11 17:23:26,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:26" (1/1) ... [2020-10-11 17:23:26,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:26" (1/1) ... [2020-10-11 17:23:26,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 17:23:26,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 17:23:26,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 17:23:26,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 17:23:26,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:26" (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 [2020-10-11 17:23:26,701 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-10-11 17:23:26,702 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-10-11 17:23:26,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 17:23:26,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 17:23:26,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 17:23:26,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 17:23:26,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 17:23:26,706 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 17:23:27,261 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 17:23:27,262 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-11 17:23:27,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 05:23:27 BoogieIcfgContainer [2020-10-11 17:23:27,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 17:23:27,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 17:23:27,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 17:23:27,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 17:23:27,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 05:23:25" (1/3) ... [2020-10-11 17:23:27,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f6e63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 05:23:27, skipping insertion in model container [2020-10-11 17:23:27,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:26" (2/3) ... [2020-10-11 17:23:27,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f6e63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 05:23:27, skipping insertion in model container [2020-10-11 17:23:27,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 05:23:27" (3/3) ... [2020-10-11 17:23:27,274 INFO L111 eAbstractionObserver]: Analyzing ICFG 23_lu-fig2.fixed.i [2020-10-11 17:23:27,287 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 17:23:27,295 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-11 17:23:27,297 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 17:23:27,321 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,321 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,321 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,322 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,322 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~PR_CreateThread__RES~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,323 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,323 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,323 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~PR_CreateThread__RES~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,323 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_#in~PR_CreateThread__RES| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,324 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_~PR_CreateThread__RES not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,324 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~PR_CreateThread__RES~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,324 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_#in~PR_CreateThread__RES| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,324 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_~PR_CreateThread__RES not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,325 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,325 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,325 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,326 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,329 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,330 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,330 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,331 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,331 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,331 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_#in~PR_CreateThread__RES| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,332 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~PR_CreateThread__RES~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,332 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,332 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_~PR_CreateThread__RES not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:27,356 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-11 17:23:27,380 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 17:23:27,380 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 17:23:27,380 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 17:23:27,380 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 17:23:27,381 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 17:23:27,381 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 17:23:27,381 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 17:23:27,381 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 17:23:27,396 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 45 places, 43 transitions, 91 flow [2020-10-11 17:23:27,432 INFO L129 PetriNetUnfolder]: 2/42 cut-off events. [2020-10-11 17:23:27,432 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 17:23:27,437 INFO L80 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 42 events. 2/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2020-10-11 17:23:27,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 43 transitions, 91 flow [2020-10-11 17:23:27,444 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 42 transitions, 87 flow [2020-10-11 17:23:27,453 INFO L129 PetriNetUnfolder]: 0/21 cut-off events. [2020-10-11 17:23:27,453 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 17:23:27,454 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 17:23:27,455 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 17:23:27,455 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 17:23:27,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 17:23:27,463 INFO L82 PathProgramCache]: Analyzing trace with hash -648751144, now seen corresponding path program 1 times [2020-10-11 17:23:27,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 17:23:27,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500787727] [2020-10-11 17:23:27,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 17:23:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 17:23:27,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 17:23:27,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500787727] [2020-10-11 17:23:27,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 17:23:27,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 17:23:27,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217692366] [2020-10-11 17:23:27,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-11 17:23:27,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 17:23:27,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-11 17:23:27,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-11 17:23:27,843 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 43 [2020-10-11 17:23:27,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 87 flow. Second operand 3 states. [2020-10-11 17:23:27,846 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 17:23:27,846 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 43 [2020-10-11 17:23:27,848 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 17:23:27,869 INFO L129 PetriNetUnfolder]: 1/40 cut-off events. [2020-10-11 17:23:27,869 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 17:23:27,870 INFO L80 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 40 events. 1/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 18 event pairs, 0 based on Foata normal form. 3/42 useless extension candidates. Maximal degree in co-relation 30. Up to 3 conditions per place. [2020-10-11 17:23:27,871 INFO L132 encePairwiseOnDemand]: 38/43 looper letters, 0 selfloop transitions, 2 changer transitions 9/40 dead transitions. [2020-10-11 17:23:27,872 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 89 flow [2020-10-11 17:23:27,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-11 17:23:27,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-11 17:23:27,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2020-10-11 17:23:27,888 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.937984496124031 [2020-10-11 17:23:27,889 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 121 transitions. [2020-10-11 17:23:27,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 121 transitions. [2020-10-11 17:23:27,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 17:23:27,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 121 transitions. [2020-10-11 17:23:27,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-11 17:23:27,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-11 17:23:27,904 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-11 17:23:27,907 INFO L185 Difference]: Start difference. First operand has 44 places, 42 transitions, 87 flow. Second operand 3 states and 121 transitions. [2020-10-11 17:23:27,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 89 flow [2020-10-11 17:23:27,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-11 17:23:27,915 INFO L241 Difference]: Finished difference. Result has 44 places, 31 transitions, 68 flow [2020-10-11 17:23:27,919 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=44, PETRI_TRANSITIONS=31} [2020-10-11 17:23:27,920 INFO L341 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2020-10-11 17:23:27,920 INFO L481 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 68 flow [2020-10-11 17:23:27,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-11 17:23:27,921 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 17:23:27,921 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] [2020-10-11 17:23:27,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 17:23:27,922 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 17:23:27,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 17:23:27,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1520181366, now seen corresponding path program 1 times [2020-10-11 17:23:27,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 17:23:27,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250439485] [2020-10-11 17:23:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 17:23:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 17:23:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 17:23:27,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250439485] [2020-10-11 17:23:27,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 17:23:27,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 17:23:27,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188224734] [2020-10-11 17:23:27,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-11 17:23:27,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 17:23:27,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-11 17:23:27,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-11 17:23:28,010 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 43 [2020-10-11 17:23:28,011 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 31 transitions, 68 flow. Second operand 3 states. [2020-10-11 17:23:28,011 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 17:23:28,011 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 43 [2020-10-11 17:23:28,011 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 17:23:28,038 INFO L129 PetriNetUnfolder]: 2/33 cut-off events. [2020-10-11 17:23:28,039 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 17:23:28,039 INFO L80 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 33 events. 2/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 29. Up to 4 conditions per place. [2020-10-11 17:23:28,040 INFO L132 encePairwiseOnDemand]: 39/43 looper letters, 2 selfloop transitions, 2 changer transitions 1/32 dead transitions. [2020-10-11 17:23:28,040 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 80 flow [2020-10-11 17:23:28,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-11 17:23:28,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-11 17:23:28,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2020-10-11 17:23:28,045 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9302325581395349 [2020-10-11 17:23:28,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 120 transitions. [2020-10-11 17:23:28,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 120 transitions. [2020-10-11 17:23:28,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 17:23:28,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 120 transitions. [2020-10-11 17:23:28,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-11 17:23:28,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-11 17:23:28,054 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-11 17:23:28,054 INFO L185 Difference]: Start difference. First operand has 44 places, 31 transitions, 68 flow. Second operand 3 states and 120 transitions. [2020-10-11 17:23:28,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 80 flow [2020-10-11 17:23:28,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 76 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 17:23:28,059 INFO L241 Difference]: Finished difference. Result has 37 places, 31 transitions, 76 flow [2020-10-11 17:23:28,059 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2020-10-11 17:23:28,061 INFO L341 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2020-10-11 17:23:28,062 INFO L481 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 76 flow [2020-10-11 17:23:28,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-11 17:23:28,062 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 17:23:28,062 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] [2020-10-11 17:23:28,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 17:23:28,063 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 17:23:28,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 17:23:28,063 INFO L82 PathProgramCache]: Analyzing trace with hash -764214644, now seen corresponding path program 1 times [2020-10-11 17:23:28,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 17:23:28,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244965622] [2020-10-11 17:23:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 17:23:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 17:23:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 17:23:28,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244965622] [2020-10-11 17:23:28,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 17:23:28,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 17:23:28,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442295628] [2020-10-11 17:23:28,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 17:23:28,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 17:23:28,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 17:23:28,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-11 17:23:28,396 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 43 [2020-10-11 17:23:28,396 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 76 flow. Second operand 4 states. [2020-10-11 17:23:28,397 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 17:23:28,397 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 43 [2020-10-11 17:23:28,397 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 17:23:28,424 INFO L129 PetriNetUnfolder]: 6/46 cut-off events. [2020-10-11 17:23:28,424 INFO L130 PetriNetUnfolder]: For 10/13 co-relation queries the response was YES. [2020-10-11 17:23:28,425 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 46 events. 6/46 cut-off events. For 10/13 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 51 event pairs, 0 based on Foata normal form. 2/48 useless extension candidates. Maximal degree in co-relation 63. Up to 9 conditions per place. [2020-10-11 17:23:28,425 INFO L132 encePairwiseOnDemand]: 36/43 looper letters, 5 selfloop transitions, 8 changer transitions 0/35 dead transitions. [2020-10-11 17:23:28,426 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 116 flow [2020-10-11 17:23:28,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 17:23:28,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-11 17:23:28,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2020-10-11 17:23:28,428 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8488372093023255 [2020-10-11 17:23:28,428 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 146 transitions. [2020-10-11 17:23:28,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 146 transitions. [2020-10-11 17:23:28,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 17:23:28,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 146 transitions. [2020-10-11 17:23:28,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-11 17:23:28,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-11 17:23:28,431 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-11 17:23:28,431 INFO L185 Difference]: Start difference. First operand has 37 places, 31 transitions, 76 flow. Second operand 4 states and 146 transitions. [2020-10-11 17:23:28,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 116 flow [2020-10-11 17:23:28,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 112 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 17:23:28,435 INFO L241 Difference]: Finished difference. Result has 39 places, 33 transitions, 103 flow [2020-10-11 17:23:28,435 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2020-10-11 17:23:28,436 INFO L341 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2020-10-11 17:23:28,436 INFO L481 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 103 flow [2020-10-11 17:23:28,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 17:23:28,436 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 17:23:28,436 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 17:23:28,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-11 17:23:28,437 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 17:23:28,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 17:23:28,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1077153863, now seen corresponding path program 1 times [2020-10-11 17:23:28,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 17:23:28,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854959357] [2020-10-11 17:23:28,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 17:23:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 17:23:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 17:23:28,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854959357] [2020-10-11 17:23:28,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 17:23:28,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 17:23:28,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88273075] [2020-10-11 17:23:28,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 17:23:28,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 17:23:28,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 17:23:28,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-11 17:23:28,564 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 43 [2020-10-11 17:23:28,564 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 103 flow. Second operand 4 states. [2020-10-11 17:23:28,564 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 17:23:28,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 43 [2020-10-11 17:23:28,565 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 17:23:28,578 INFO L129 PetriNetUnfolder]: 4/40 cut-off events. [2020-10-11 17:23:28,578 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2020-10-11 17:23:28,579 INFO L80 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 40 events. 4/40 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 0 based on Foata normal form. 1/41 useless extension candidates. Maximal degree in co-relation 51. Up to 7 conditions per place. [2020-10-11 17:23:28,579 INFO L132 encePairwiseOnDemand]: 40/43 looper letters, 0 selfloop transitions, 0 changer transitions 32/32 dead transitions. [2020-10-11 17:23:28,579 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 105 flow [2020-10-11 17:23:28,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 17:23:28,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-11 17:23:28,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 151 transitions. [2020-10-11 17:23:28,581 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.877906976744186 [2020-10-11 17:23:28,582 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 151 transitions. [2020-10-11 17:23:28,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 151 transitions. [2020-10-11 17:23:28,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 17:23:28,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 151 transitions. [2020-10-11 17:23:28,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-11 17:23:28,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-11 17:23:28,584 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-11 17:23:28,584 INFO L185 Difference]: Start difference. First operand has 39 places, 33 transitions, 103 flow. Second operand 4 states and 151 transitions. [2020-10-11 17:23:28,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 105 flow [2020-10-11 17:23:28,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 32 transitions, 100 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-11 17:23:28,586 INFO L241 Difference]: Finished difference. Result has 40 places, 0 transitions, 0 flow [2020-10-11 17:23:28,587 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=40, PETRI_TRANSITIONS=0} [2020-10-11 17:23:28,587 INFO L341 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2020-10-11 17:23:28,587 INFO L481 AbstractCegarLoop]: Abstraction has has 40 places, 0 transitions, 0 flow [2020-10-11 17:23:28,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 17:23:28,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-11 17:23:28,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 05:23:28 BasicIcfg [2020-10-11 17:23:28,594 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 17:23:28,598 INFO L168 Benchmark]: Toolchain (without parser) took 2727.26 ms. Allocated memory was 250.6 MB in the beginning and 355.5 MB in the end (delta: 104.9 MB). Free memory was 205.7 MB in the beginning and 282.0 MB in the end (delta: -76.3 MB). Peak memory consumption was 28.5 MB. Max. memory is 14.2 GB. [2020-10-11 17:23:28,598 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 250.6 MB. Free memory was 228.7 MB in the beginning and 227.8 MB in the end (delta: 839.0 kB). Peak memory consumption was 839.0 kB. Max. memory is 14.2 GB. [2020-10-11 17:23:28,600 INFO L168 Benchmark]: CACSL2BoogieTranslator took 673.06 ms. Allocated memory was 250.6 MB in the beginning and 316.1 MB in the end (delta: 65.5 MB). Free memory was 205.7 MB in the beginning and 270.7 MB in the end (delta: -65.0 MB). Peak memory consumption was 29.8 MB. Max. memory is 14.2 GB. [2020-10-11 17:23:28,601 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.33 ms. Allocated memory is still 316.1 MB. Free memory was 269.9 MB in the beginning and 268.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. [2020-10-11 17:23:28,601 INFO L168 Benchmark]: Boogie Preprocessor took 28.56 ms. Allocated memory is still 316.1 MB. Free memory was 268.2 MB in the beginning and 266.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. [2020-10-11 17:23:28,602 INFO L168 Benchmark]: RCFGBuilder took 635.76 ms. Allocated memory is still 316.1 MB. Free memory was 266.4 MB in the beginning and 221.8 MB in the end (delta: 44.6 MB). Peak memory consumption was 44.6 MB. Max. memory is 14.2 GB. [2020-10-11 17:23:28,603 INFO L168 Benchmark]: TraceAbstraction took 1328.89 ms. Allocated memory was 316.1 MB in the beginning and 355.5 MB in the end (delta: 39.3 MB). Free memory was 221.8 MB in the beginning and 282.0 MB in the end (delta: -60.2 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 17:23:28,608 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 250.6 MB. Free memory was 228.7 MB in the beginning and 227.8 MB in the end (delta: 839.0 kB). Peak memory consumption was 839.0 kB. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 673.06 ms. Allocated memory was 250.6 MB in the beginning and 316.1 MB in the end (delta: 65.5 MB). Free memory was 205.7 MB in the beginning and 270.7 MB in the end (delta: -65.0 MB). Peak memory consumption was 29.8 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 55.33 ms. Allocated memory is still 316.1 MB. Free memory was 269.9 MB in the beginning and 268.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 28.56 ms. Allocated memory is still 316.1 MB. Free memory was 268.2 MB in the beginning and 266.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. * RCFGBuilder took 635.76 ms. Allocated memory is still 316.1 MB. Free memory was 266.4 MB in the beginning and 221.8 MB in the end (delta: 44.6 MB). Peak memory consumption was 44.6 MB. Max. memory is 14.2 GB. * TraceAbstraction took 1328.89 ms. Allocated memory was 316.1 MB in the beginning and 355.5 MB in the end (delta: 39.3 MB). Free memory was 221.8 MB in the beginning and 282.0 MB in the end (delta: -60.2 MB). There was no memory consumed. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 696]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 710]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 42 locations, 2 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: 1.2s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 26 SDtfs, 10 SDslu, 4 SDs, 0 SdLazy, 39 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=3, 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, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 93 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 89 ConstructedInterpolants, 0 QuantifiedInterpolants, 6656 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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...