/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --traceabstraction.use.on-demand.petri.net.difference true --traceabstraction.size.reduction.to.apply.after.petri.net.difference REMOVE_DEAD -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 23:33:27,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 23:33:27,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 23:33:27,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 23:33:27,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 23:33:27,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 23:33:27,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 23:33:27,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 23:33:27,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 23:33:27,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 23:33:27,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 23:33:27,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 23:33:27,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 23:33:27,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 23:33:27,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 23:33:27,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 23:33:27,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 23:33:27,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 23:33:27,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 23:33:27,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 23:33:27,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 23:33:27,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 23:33:27,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 23:33:27,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 23:33:27,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 23:33:27,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 23:33:27,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 23:33:27,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 23:33:27,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 23:33:27,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 23:33:27,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 23:33:27,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 23:33:27,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 23:33:27,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 23:33:27,129 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 23:33:27,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 23:33:27,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 23:33:27,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 23:33:27,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 23:33:27,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 23:33:27,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 23:33:27,131 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 [2022-12-12 23:33:27,155 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 23:33:27,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 23:33:27,156 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 23:33:27,156 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 23:33:27,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 23:33:27,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 23:33:27,157 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 23:33:27,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 23:33:27,157 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 23:33:27,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 23:33:27,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 23:33:27,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 23:33:27,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 23:33:27,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 23:33:27,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 23:33:27,158 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 23:33:27,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 23:33:27,158 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 23:33:27,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 23:33:27,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 23:33:27,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 23:33:27,159 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 23:33:27,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 23:33:27,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 23:33:27,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 23:33:27,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 23:33:27,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 23:33:27,159 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 23:33:27,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 23:33:27,159 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 23:33:27,160 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_DEAD [2022-12-12 23:33:27,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 23:33:27,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 23:33:27,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 23:33:27,449 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 23:33:27,450 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 23:33:27,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2022-12-12 23:33:28,446 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 23:33:28,611 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 23:33:28,612 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2022-12-12 23:33:28,617 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92c8bee49/c2689874961447749ea655841e58a482/FLAGfab68db89 [2022-12-12 23:33:28,628 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92c8bee49/c2689874961447749ea655841e58a482 [2022-12-12 23:33:28,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 23:33:28,631 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 23:33:28,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 23:33:28,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 23:33:28,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 23:33:28,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:33:28" (1/1) ... [2022-12-12 23:33:28,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b77ebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:33:28, skipping insertion in model container [2022-12-12 23:33:28,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:33:28" (1/1) ... [2022-12-12 23:33:28,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 23:33:28,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 23:33:28,738 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:33:28,739 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:33:28,743 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:33:28,744 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:33:28,745 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:33:28,745 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:33:28,746 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:33:28,747 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:33:28,752 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c[2612,2625] [2022-12-12 23:33:28,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 23:33:28,761 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 23:33:28,769 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:33:28,770 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:33:28,770 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:33:28,771 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:33:28,772 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:33:28,772 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:33:28,772 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:33:28,773 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:33:28,776 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c[2612,2625] [2022-12-12 23:33:28,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 23:33:28,786 INFO L208 MainTranslator]: Completed translation [2022-12-12 23:33:28,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:33:28 WrapperNode [2022-12-12 23:33:28,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 23:33:28,787 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 23:33:28,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 23:33:28,787 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 23:33:28,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:33:28" (1/1) ... [2022-12-12 23:33:28,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:33:28" (1/1) ... [2022-12-12 23:33:28,810 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 117 [2022-12-12 23:33:28,811 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 23:33:28,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 23:33:28,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 23:33:28,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 23:33:28,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:33:28" (1/1) ... [2022-12-12 23:33:28,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:33:28" (1/1) ... [2022-12-12 23:33:28,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:33:28" (1/1) ... [2022-12-12 23:33:28,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:33:28" (1/1) ... [2022-12-12 23:33:28,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:33:28" (1/1) ... [2022-12-12 23:33:28,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:33:28" (1/1) ... [2022-12-12 23:33:28,827 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:33:28" (1/1) ... [2022-12-12 23:33:28,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:33:28" (1/1) ... [2022-12-12 23:33:28,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 23:33:28,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 23:33:28,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 23:33:28,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 23:33:28,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:33:28" (1/1) ... [2022-12-12 23:33:28,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 23:33:28,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:33:28,867 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-12 23:33:28,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-12 23:33:28,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 23:33:28,902 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 23:33:28,902 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 23:33:28,902 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 23:33:28,903 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 23:33:28,903 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-12 23:33:28,903 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-12 23:33:28,903 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-12 23:33:28,903 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-12 23:33:28,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 23:33:28,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 23:33:28,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 23:33:28,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 23:33:28,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 23:33:28,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 23:33:28,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 23:33:28,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 23:33:28,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 23:33:28,905 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 23:33:28,967 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 23:33:28,968 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 23:33:29,195 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 23:33:29,220 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 23:33:29,220 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-12 23:33:29,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:33:29 BoogieIcfgContainer [2022-12-12 23:33:29,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 23:33:29,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 23:33:29,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 23:33:29,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 23:33:29,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 11:33:28" (1/3) ... [2022-12-12 23:33:29,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba87345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:33:29, skipping insertion in model container [2022-12-12 23:33:29,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:33:28" (2/3) ... [2022-12-12 23:33:29,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba87345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:33:29, skipping insertion in model container [2022-12-12 23:33:29,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:33:29" (3/3) ... [2022-12-12 23:33:29,227 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2022-12-12 23:33:29,243 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 23:33:29,243 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 23:33:29,244 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 23:33:29,346 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-12 23:33:29,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 126 transitions, 284 flow [2022-12-12 23:33:29,449 INFO L130 PetriNetUnfolder]: 10/122 cut-off events. [2022-12-12 23:33:29,450 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-12 23:33:29,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 122 events. 10/122 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 95 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 83. Up to 2 conditions per place. [2022-12-12 23:33:29,454 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 126 transitions, 284 flow [2022-12-12 23:33:29,459 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 110 transitions, 244 flow [2022-12-12 23:33:29,460 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 23:33:29,481 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 110 transitions, 244 flow [2022-12-12 23:33:29,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 110 transitions, 244 flow [2022-12-12 23:33:29,514 INFO L130 PetriNetUnfolder]: 10/110 cut-off events. [2022-12-12 23:33:29,514 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-12 23:33:29,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 110 events. 10/110 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 97 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 83. Up to 2 conditions per place. [2022-12-12 23:33:29,517 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 110 transitions, 244 flow [2022-12-12 23:33:29,518 INFO L226 LiptonReduction]: Number of co-enabled transitions 2520 [2022-12-12 23:33:32,690 INFO L241 LiptonReduction]: Total number of compositions: 81 [2022-12-12 23:33:32,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 23:33:32,713 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@19b1882, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 23:33:32,713 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-12 23:33:32,727 INFO L130 PetriNetUnfolder]: 4/28 cut-off events. [2022-12-12 23:33:32,727 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-12 23:33:32,727 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:33:32,728 INFO L214 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] [2022-12-12 23:33:32,728 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 23:33:32,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:33:32,732 INFO L85 PathProgramCache]: Analyzing trace with hash -514425640, now seen corresponding path program 1 times [2022-12-12 23:33:32,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:33:32,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358530479] [2022-12-12 23:33:32,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:32,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:33:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:33:33,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:33:33,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358530479] [2022-12-12 23:33:33,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358530479] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:33:33,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:33:33,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-12 23:33:33,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906028088] [2022-12-12 23:33:33,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:33:33,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 23:33:33,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:33:33,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 23:33:33,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 23:33:33,057 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2022-12-12 23:33:33,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:33,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:33:33,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2022-12-12 23:33:33,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:33:33,213 INFO L130 PetriNetUnfolder]: 1343/1736 cut-off events. [2022-12-12 23:33:33,213 INFO L131 PetriNetUnfolder]: For 131/131 co-relation queries the response was YES. [2022-12-12 23:33:33,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3612 conditions, 1736 events. 1343/1736 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5934 event pairs, 215 based on Foata normal form. 1/1045 useless extension candidates. Maximal degree in co-relation 2691. Up to 1515 conditions per place. [2022-12-12 23:33:33,223 INFO L137 encePairwiseOnDemand]: 23/29 looper letters, 39 selfloop transitions, 3 changer transitions 3/49 dead transitions. [2022-12-12 23:33:33,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 233 flow [2022-12-12 23:33:33,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 23:33:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 23:33:33,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2022-12-12 23:33:33,232 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6896551724137931 [2022-12-12 23:33:33,236 INFO L295 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2022-12-12 23:33:33,236 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 49 transitions, 233 flow [2022-12-12 23:33:33,243 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 46 transitions, 215 flow [2022-12-12 23:33:33,243 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 46 transitions, 215 flow [2022-12-12 23:33:33,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:33,244 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:33:33,244 INFO L214 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] [2022-12-12 23:33:33,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 23:33:33,245 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 23:33:33,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:33:33,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1434159477, now seen corresponding path program 1 times [2022-12-12 23:33:33,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:33:33,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856901999] [2022-12-12 23:33:33,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:33,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:33:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:33:33,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:33:33,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856901999] [2022-12-12 23:33:33,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856901999] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:33:33,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:33:33,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 23:33:33,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973892809] [2022-12-12 23:33:33,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:33:33,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:33:33,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:33:33,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:33:33,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:33:33,442 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2022-12-12 23:33:33,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 46 transitions, 215 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:33,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:33:33,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2022-12-12 23:33:33,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:33:33,764 INFO L130 PetriNetUnfolder]: 2035/2803 cut-off events. [2022-12-12 23:33:33,764 INFO L131 PetriNetUnfolder]: For 536/574 co-relation queries the response was YES. [2022-12-12 23:33:33,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8435 conditions, 2803 events. 2035/2803 cut-off events. For 536/574 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12236 event pairs, 215 based on Foata normal form. 2/2032 useless extension candidates. Maximal degree in co-relation 6187. Up to 2103 conditions per place. [2022-12-12 23:33:33,778 INFO L137 encePairwiseOnDemand]: 22/29 looper letters, 96 selfloop transitions, 4 changer transitions 25/127 dead transitions. [2022-12-12 23:33:33,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 127 transitions, 857 flow [2022-12-12 23:33:33,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:33:33,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:33:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2022-12-12 23:33:33,780 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6344827586206897 [2022-12-12 23:33:33,780 INFO L295 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2022-12-12 23:33:33,780 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 127 transitions, 857 flow [2022-12-12 23:33:33,791 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 102 transitions, 683 flow [2022-12-12 23:33:33,792 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 102 transitions, 683 flow [2022-12-12 23:33:33,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:33,792 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:33:33,792 INFO L214 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] [2022-12-12 23:33:33,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 23:33:33,792 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 23:33:33,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:33:33,793 INFO L85 PathProgramCache]: Analyzing trace with hash -288431369, now seen corresponding path program 2 times [2022-12-12 23:33:33,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:33:33,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291753825] [2022-12-12 23:33:33,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:33,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:33:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:33:33,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:33:33,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291753825] [2022-12-12 23:33:33,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291753825] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:33:33,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:33:33,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 23:33:33,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873317183] [2022-12-12 23:33:33,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:33:33,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:33:33,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:33:33,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:33:33,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:33:33,883 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2022-12-12 23:33:33,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 102 transitions, 683 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:33,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:33:33,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2022-12-12 23:33:33,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:33:34,180 INFO L130 PetriNetUnfolder]: 2584/3611 cut-off events. [2022-12-12 23:33:34,180 INFO L131 PetriNetUnfolder]: For 2372/2454 co-relation queries the response was YES. [2022-12-12 23:33:34,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14038 conditions, 3611 events. 2584/3611 cut-off events. For 2372/2454 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16914 event pairs, 285 based on Foata normal form. 9/2750 useless extension candidates. Maximal degree in co-relation 13296. Up to 2732 conditions per place. [2022-12-12 23:33:34,201 INFO L137 encePairwiseOnDemand]: 21/29 looper letters, 177 selfloop transitions, 16 changer transitions 43/238 dead transitions. [2022-12-12 23:33:34,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 238 transitions, 2059 flow [2022-12-12 23:33:34,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 23:33:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 23:33:34,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2022-12-12 23:33:34,203 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5459770114942529 [2022-12-12 23:33:34,203 INFO L295 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2022-12-12 23:33:34,203 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 238 transitions, 2059 flow [2022-12-12 23:33:34,220 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 195 transitions, 1686 flow [2022-12-12 23:33:34,220 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 195 transitions, 1686 flow [2022-12-12 23:33:34,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:34,220 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:33:34,220 INFO L214 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] [2022-12-12 23:33:34,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 23:33:34,221 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 23:33:34,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:33:34,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1707795993, now seen corresponding path program 3 times [2022-12-12 23:33:34,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:33:34,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276284499] [2022-12-12 23:33:34,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:34,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:33:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:33:34,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:33:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276284499] [2022-12-12 23:33:34,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276284499] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:33:34,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:33:34,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 23:33:34,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252063161] [2022-12-12 23:33:34,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:33:34,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:33:34,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:33:34,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:33:34,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:33:34,313 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2022-12-12 23:33:34,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 195 transitions, 1686 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:34,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:33:34,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2022-12-12 23:33:34,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:33:34,494 INFO L380 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([437] L72-4-->L72-4: Formula: (and (not (= |v_thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1_9| 0)) (= (+ |v_thread4Thread1of1ForFork1_~i~3#1_26| 1) |v_thread4Thread1of1ForFork1_~i~3#1_25|) (< (mod |v_thread4Thread1of1ForFork1_~i~3#1_26| 4294967296) (mod v_~N~0_45 4294967296)) (= |v_thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_9| (ite (< 0 (mod v_~counter~0_104 4294967296)) 1 0)) (= v_~counter~0_104 (+ v_~c~0_48 v_~counter~0_103)) (= |v_thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_9| |v_thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1_9|)) InVars {~counter~0=v_~counter~0_104, ~c~0=v_~c~0_48, thread4Thread1of1ForFork1_~i~3#1=|v_thread4Thread1of1ForFork1_~i~3#1_26|, ~N~0=v_~N~0_45} OutVars{~counter~0=v_~counter~0_103, ~c~0=v_~c~0_48, thread4Thread1of1ForFork1_~i~3#1=|v_thread4Thread1of1ForFork1_~i~3#1_25|, thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1=|v_thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_9|, thread4Thread1of1ForFork1_#t~post4#1=|v_thread4Thread1of1ForFork1_#t~post4#1_17|, ~N~0=v_~N~0_45, thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1=|v_thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1_9|} AuxVars[] AssignedVars[~counter~0, thread4Thread1of1ForFork1_~i~3#1, thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1, thread4Thread1of1ForFork1_#t~post4#1, thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1][168], [thread4Thread1of1ForFork1InUse, thread2Thread1of1ForFork2InUse, 132#true, 83#L95-1true, 41#L72-4true, 137#(= |thread2Thread1of1ForFork2_~i~1#1| 0), 153#(= thread3Thread1of1ForFork3_~i~2 0), 34#L51-4true, 106#L41-4true, 39#L62-4true, thread1Thread1of1ForFork0InUse, 144#true, thread3Thread1of1ForFork3InUse]) [2022-12-12 23:33:34,495 INFO L382 tUnfolder$Statistics]: this new event has 16 ancestors and is cut-off event [2022-12-12 23:33:34,495 INFO L385 tUnfolder$Statistics]: existing Event has 15 ancestors and is cut-off event [2022-12-12 23:33:34,495 INFO L385 tUnfolder$Statistics]: existing Event has 16 ancestors and is cut-off event [2022-12-12 23:33:34,495 INFO L385 tUnfolder$Statistics]: existing Event has 15 ancestors and is cut-off event [2022-12-12 23:33:34,495 INFO L380 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([469] L72-4-->thread4EXIT: Formula: (and (= |v_thread4Thread1of1ForFork1_#res#1.offset_Out_2| 0) (not (< (mod |v_thread4Thread1of1ForFork1_~i~3#1_In_1| 4294967296) (mod v_~N~0_In_5 4294967296))) (= |v_thread4Thread1of1ForFork1_#res#1.base_Out_2| 0)) InVars {thread4Thread1of1ForFork1_~i~3#1=|v_thread4Thread1of1ForFork1_~i~3#1_In_1|, ~N~0=v_~N~0_In_5} OutVars{thread4Thread1of1ForFork1_#res#1.base=|v_thread4Thread1of1ForFork1_#res#1.base_Out_2|, thread4Thread1of1ForFork1_#res#1.offset=|v_thread4Thread1of1ForFork1_#res#1.offset_Out_2|, ~N~0=v_~N~0_In_5, thread4Thread1of1ForFork1_~i~3#1=|v_thread4Thread1of1ForFork1_~i~3#1_In_1|} AuxVars[] AssignedVars[thread4Thread1of1ForFork1_#res#1.base, thread4Thread1of1ForFork1_#res#1.offset][169], [thread4Thread1of1ForFork1InUse, thread2Thread1of1ForFork2InUse, 132#true, 83#L95-1true, 137#(= |thread2Thread1of1ForFork2_~i~1#1| 0), 153#(= thread3Thread1of1ForFork3_~i~2 0), 87#thread4EXITtrue, 34#L51-4true, 106#L41-4true, 39#L62-4true, thread1Thread1of1ForFork0InUse, 144#true, thread3Thread1of1ForFork3InUse]) [2022-12-12 23:33:34,495 INFO L382 tUnfolder$Statistics]: this new event has 15 ancestors and is not cut-off event [2022-12-12 23:33:34,495 INFO L385 tUnfolder$Statistics]: existing Event has 16 ancestors and is not cut-off event [2022-12-12 23:33:34,496 INFO L385 tUnfolder$Statistics]: existing Event has 15 ancestors and is not cut-off event [2022-12-12 23:33:34,496 INFO L385 tUnfolder$Statistics]: existing Event has 16 ancestors and is not cut-off event [2022-12-12 23:33:34,514 INFO L380 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([437] L72-4-->L72-4: Formula: (and (not (= |v_thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1_9| 0)) (= (+ |v_thread4Thread1of1ForFork1_~i~3#1_26| 1) |v_thread4Thread1of1ForFork1_~i~3#1_25|) (< (mod |v_thread4Thread1of1ForFork1_~i~3#1_26| 4294967296) (mod v_~N~0_45 4294967296)) (= |v_thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_9| (ite (< 0 (mod v_~counter~0_104 4294967296)) 1 0)) (= v_~counter~0_104 (+ v_~c~0_48 v_~counter~0_103)) (= |v_thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_9| |v_thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1_9|)) InVars {~counter~0=v_~counter~0_104, ~c~0=v_~c~0_48, thread4Thread1of1ForFork1_~i~3#1=|v_thread4Thread1of1ForFork1_~i~3#1_26|, ~N~0=v_~N~0_45} OutVars{~counter~0=v_~counter~0_103, ~c~0=v_~c~0_48, thread4Thread1of1ForFork1_~i~3#1=|v_thread4Thread1of1ForFork1_~i~3#1_25|, thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1=|v_thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_9|, thread4Thread1of1ForFork1_#t~post4#1=|v_thread4Thread1of1ForFork1_#t~post4#1_17|, ~N~0=v_~N~0_45, thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1=|v_thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1_9|} AuxVars[] AssignedVars[~counter~0, thread4Thread1of1ForFork1_~i~3#1, thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1, thread4Thread1of1ForFork1_#t~post4#1, thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1][168], [thread4Thread1of1ForFork1InUse, thread2Thread1of1ForFork2InUse, 132#true, 83#L95-1true, 41#L72-4true, 137#(= |thread2Thread1of1ForFork2_~i~1#1| 0), 153#(= thread3Thread1of1ForFork3_~i~2 0), 34#L51-4true, 39#L62-4true, 64#thread1EXITtrue, thread1Thread1of1ForFork0InUse, 144#true, thread3Thread1of1ForFork3InUse]) [2022-12-12 23:33:34,515 INFO L382 tUnfolder$Statistics]: this new event has 17 ancestors and is cut-off event [2022-12-12 23:33:34,515 INFO L385 tUnfolder$Statistics]: existing Event has 16 ancestors and is cut-off event [2022-12-12 23:33:34,515 INFO L385 tUnfolder$Statistics]: existing Event has 16 ancestors and is cut-off event [2022-12-12 23:33:34,515 INFO L385 tUnfolder$Statistics]: existing Event has 17 ancestors and is cut-off event [2022-12-12 23:33:34,515 INFO L380 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([469] L72-4-->thread4EXIT: Formula: (and (= |v_thread4Thread1of1ForFork1_#res#1.offset_Out_2| 0) (not (< (mod |v_thread4Thread1of1ForFork1_~i~3#1_In_1| 4294967296) (mod v_~N~0_In_5 4294967296))) (= |v_thread4Thread1of1ForFork1_#res#1.base_Out_2| 0)) InVars {thread4Thread1of1ForFork1_~i~3#1=|v_thread4Thread1of1ForFork1_~i~3#1_In_1|, ~N~0=v_~N~0_In_5} OutVars{thread4Thread1of1ForFork1_#res#1.base=|v_thread4Thread1of1ForFork1_#res#1.base_Out_2|, thread4Thread1of1ForFork1_#res#1.offset=|v_thread4Thread1of1ForFork1_#res#1.offset_Out_2|, ~N~0=v_~N~0_In_5, thread4Thread1of1ForFork1_~i~3#1=|v_thread4Thread1of1ForFork1_~i~3#1_In_1|} AuxVars[] AssignedVars[thread4Thread1of1ForFork1_#res#1.base, thread4Thread1of1ForFork1_#res#1.offset][169], [thread4Thread1of1ForFork1InUse, thread2Thread1of1ForFork2InUse, 132#true, 83#L95-1true, 137#(= |thread2Thread1of1ForFork2_~i~1#1| 0), 153#(= thread3Thread1of1ForFork3_~i~2 0), 87#thread4EXITtrue, 34#L51-4true, 39#L62-4true, 64#thread1EXITtrue, thread1Thread1of1ForFork0InUse, 144#true, thread3Thread1of1ForFork3InUse]) [2022-12-12 23:33:34,515 INFO L382 tUnfolder$Statistics]: this new event has 16 ancestors and is not cut-off event [2022-12-12 23:33:34,515 INFO L385 tUnfolder$Statistics]: existing Event has 16 ancestors and is not cut-off event [2022-12-12 23:33:34,515 INFO L385 tUnfolder$Statistics]: existing Event has 17 ancestors and is not cut-off event [2022-12-12 23:33:34,515 INFO L385 tUnfolder$Statistics]: existing Event has 17 ancestors and is not cut-off event [2022-12-12 23:33:34,551 INFO L380 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([437] L72-4-->L72-4: Formula: (and (not (= |v_thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1_9| 0)) (= (+ |v_thread4Thread1of1ForFork1_~i~3#1_26| 1) |v_thread4Thread1of1ForFork1_~i~3#1_25|) (< (mod |v_thread4Thread1of1ForFork1_~i~3#1_26| 4294967296) (mod v_~N~0_45 4294967296)) (= |v_thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_9| (ite (< 0 (mod v_~counter~0_104 4294967296)) 1 0)) (= v_~counter~0_104 (+ v_~c~0_48 v_~counter~0_103)) (= |v_thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_9| |v_thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1_9|)) InVars {~counter~0=v_~counter~0_104, ~c~0=v_~c~0_48, thread4Thread1of1ForFork1_~i~3#1=|v_thread4Thread1of1ForFork1_~i~3#1_26|, ~N~0=v_~N~0_45} OutVars{~counter~0=v_~counter~0_103, ~c~0=v_~c~0_48, thread4Thread1of1ForFork1_~i~3#1=|v_thread4Thread1of1ForFork1_~i~3#1_25|, thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1=|v_thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_9|, thread4Thread1of1ForFork1_#t~post4#1=|v_thread4Thread1of1ForFork1_#t~post4#1_17|, ~N~0=v_~N~0_45, thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1=|v_thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1_9|} AuxVars[] AssignedVars[~counter~0, thread4Thread1of1ForFork1_~i~3#1, thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1, thread4Thread1of1ForFork1_#t~post4#1, thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1][168], [thread4Thread1of1ForFork1InUse, 34#L51-4true, thread2Thread1of1ForFork2InUse, 132#true, 39#L62-4true, 41#L72-4true, 137#(= |thread2Thread1of1ForFork2_~i~1#1| 0), thread1Thread1of1ForFork0NotInUse, 82#L95-2true, 153#(= thread3Thread1of1ForFork3_~i~2 0), 144#true, thread3Thread1of1ForFork3InUse]) [2022-12-12 23:33:34,551 INFO L382 tUnfolder$Statistics]: this new event has 18 ancestors and is cut-off event [2022-12-12 23:33:34,551 INFO L385 tUnfolder$Statistics]: existing Event has 18 ancestors and is cut-off event [2022-12-12 23:33:34,551 INFO L385 tUnfolder$Statistics]: existing Event has 17 ancestors and is cut-off event [2022-12-12 23:33:34,551 INFO L385 tUnfolder$Statistics]: existing Event has 17 ancestors and is cut-off event [2022-12-12 23:33:34,551 INFO L380 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([469] L72-4-->thread4EXIT: Formula: (and (= |v_thread4Thread1of1ForFork1_#res#1.offset_Out_2| 0) (not (< (mod |v_thread4Thread1of1ForFork1_~i~3#1_In_1| 4294967296) (mod v_~N~0_In_5 4294967296))) (= |v_thread4Thread1of1ForFork1_#res#1.base_Out_2| 0)) InVars {thread4Thread1of1ForFork1_~i~3#1=|v_thread4Thread1of1ForFork1_~i~3#1_In_1|, ~N~0=v_~N~0_In_5} OutVars{thread4Thread1of1ForFork1_#res#1.base=|v_thread4Thread1of1ForFork1_#res#1.base_Out_2|, thread4Thread1of1ForFork1_#res#1.offset=|v_thread4Thread1of1ForFork1_#res#1.offset_Out_2|, ~N~0=v_~N~0_In_5, thread4Thread1of1ForFork1_~i~3#1=|v_thread4Thread1of1ForFork1_~i~3#1_In_1|} AuxVars[] AssignedVars[thread4Thread1of1ForFork1_#res#1.base, thread4Thread1of1ForFork1_#res#1.offset][169], [thread4Thread1of1ForFork1InUse, 34#L51-4true, thread2Thread1of1ForFork2InUse, 132#true, 39#L62-4true, 137#(= |thread2Thread1of1ForFork2_~i~1#1| 0), thread1Thread1of1ForFork0NotInUse, 82#L95-2true, 153#(= thread3Thread1of1ForFork3_~i~2 0), 87#thread4EXITtrue, 144#true, thread3Thread1of1ForFork3InUse]) [2022-12-12 23:33:34,551 INFO L382 tUnfolder$Statistics]: this new event has 18 ancestors and is cut-off event [2022-12-12 23:33:34,551 INFO L385 tUnfolder$Statistics]: existing Event has 18 ancestors and is cut-off event [2022-12-12 23:33:34,551 INFO L385 tUnfolder$Statistics]: existing Event has 17 ancestors and is cut-off event [2022-12-12 23:33:34,551 INFO L385 tUnfolder$Statistics]: existing Event has 17 ancestors and is cut-off event [2022-12-12 23:33:34,625 INFO L380 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([437] L72-4-->L72-4: Formula: (and (not (= |v_thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1_9| 0)) (= (+ |v_thread4Thread1of1ForFork1_~i~3#1_26| 1) |v_thread4Thread1of1ForFork1_~i~3#1_25|) (< (mod |v_thread4Thread1of1ForFork1_~i~3#1_26| 4294967296) (mod v_~N~0_45 4294967296)) (= |v_thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_9| (ite (< 0 (mod v_~counter~0_104 4294967296)) 1 0)) (= v_~counter~0_104 (+ v_~c~0_48 v_~counter~0_103)) (= |v_thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_9| |v_thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1_9|)) InVars {~counter~0=v_~counter~0_104, ~c~0=v_~c~0_48, thread4Thread1of1ForFork1_~i~3#1=|v_thread4Thread1of1ForFork1_~i~3#1_26|, ~N~0=v_~N~0_45} OutVars{~counter~0=v_~counter~0_103, ~c~0=v_~c~0_48, thread4Thread1of1ForFork1_~i~3#1=|v_thread4Thread1of1ForFork1_~i~3#1_25|, thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1=|v_thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_9|, thread4Thread1of1ForFork1_#t~post4#1=|v_thread4Thread1of1ForFork1_#t~post4#1_17|, ~N~0=v_~N~0_45, thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1=|v_thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1_9|} AuxVars[] AssignedVars[~counter~0, thread4Thread1of1ForFork1_~i~3#1, thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1, thread4Thread1of1ForFork1_#t~post4#1, thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1][168], [57#L96-1true, thread4Thread1of1ForFork1InUse, 34#L51-4true, thread2Thread1of1ForFork2InUse, 132#true, 39#L62-4true, 41#L72-4true, 137#(= |thread2Thread1of1ForFork2_~i~1#1| 0), thread1Thread1of1ForFork0NotInUse, 153#(= thread3Thread1of1ForFork3_~i~2 0), 144#true, thread3Thread1of1ForFork3InUse]) [2022-12-12 23:33:34,626 INFO L382 tUnfolder$Statistics]: this new event has 19 ancestors and is cut-off event [2022-12-12 23:33:34,626 INFO L385 tUnfolder$Statistics]: existing Event has 18 ancestors and is cut-off event [2022-12-12 23:33:34,626 INFO L385 tUnfolder$Statistics]: existing Event has 19 ancestors and is cut-off event [2022-12-12 23:33:34,626 INFO L385 tUnfolder$Statistics]: existing Event has 18 ancestors and is cut-off event [2022-12-12 23:33:34,626 INFO L380 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([469] L72-4-->thread4EXIT: Formula: (and (= |v_thread4Thread1of1ForFork1_#res#1.offset_Out_2| 0) (not (< (mod |v_thread4Thread1of1ForFork1_~i~3#1_In_1| 4294967296) (mod v_~N~0_In_5 4294967296))) (= |v_thread4Thread1of1ForFork1_#res#1.base_Out_2| 0)) InVars {thread4Thread1of1ForFork1_~i~3#1=|v_thread4Thread1of1ForFork1_~i~3#1_In_1|, ~N~0=v_~N~0_In_5} OutVars{thread4Thread1of1ForFork1_#res#1.base=|v_thread4Thread1of1ForFork1_#res#1.base_Out_2|, thread4Thread1of1ForFork1_#res#1.offset=|v_thread4Thread1of1ForFork1_#res#1.offset_Out_2|, ~N~0=v_~N~0_In_5, thread4Thread1of1ForFork1_~i~3#1=|v_thread4Thread1of1ForFork1_~i~3#1_In_1|} AuxVars[] AssignedVars[thread4Thread1of1ForFork1_#res#1.base, thread4Thread1of1ForFork1_#res#1.offset][169], [57#L96-1true, thread4Thread1of1ForFork1InUse, 34#L51-4true, thread2Thread1of1ForFork2InUse, 132#true, 39#L62-4true, 137#(= |thread2Thread1of1ForFork2_~i~1#1| 0), thread1Thread1of1ForFork0NotInUse, 153#(= thread3Thread1of1ForFork3_~i~2 0), 87#thread4EXITtrue, 144#true, thread3Thread1of1ForFork3InUse]) [2022-12-12 23:33:34,626 INFO L382 tUnfolder$Statistics]: this new event has 19 ancestors and is cut-off event [2022-12-12 23:33:34,626 INFO L385 tUnfolder$Statistics]: existing Event has 18 ancestors and is cut-off event [2022-12-12 23:33:34,626 INFO L385 tUnfolder$Statistics]: existing Event has 19 ancestors and is cut-off event [2022-12-12 23:33:34,626 INFO L385 tUnfolder$Statistics]: existing Event has 18 ancestors and is cut-off event [2022-12-12 23:33:34,689 INFO L130 PetriNetUnfolder]: 3088/4268 cut-off events. [2022-12-12 23:33:34,689 INFO L131 PetriNetUnfolder]: For 4372/4434 co-relation queries the response was YES. [2022-12-12 23:33:34,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20838 conditions, 4268 events. 3088/4268 cut-off events. For 4372/4434 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 20015 event pairs, 295 based on Foata normal form. 49/3252 useless extension candidates. Maximal degree in co-relation 19873. Up to 3684 conditions per place. [2022-12-12 23:33:34,713 INFO L137 encePairwiseOnDemand]: 22/29 looper letters, 269 selfloop transitions, 13 changer transitions 30/314 dead transitions. [2022-12-12 23:33:34,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 314 transitions, 3344 flow [2022-12-12 23:33:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:33:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:33:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2022-12-12 23:33:34,715 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5241379310344828 [2022-12-12 23:33:34,715 INFO L295 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2022-12-12 23:33:34,715 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 314 transitions, 3344 flow [2022-12-12 23:33:34,735 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 284 transitions, 3030 flow [2022-12-12 23:33:34,735 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 284 transitions, 3030 flow [2022-12-12 23:33:34,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:34,735 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:33:34,736 INFO L214 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] [2022-12-12 23:33:34,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-12 23:33:34,736 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 23:33:34,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:33:34,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1612510987, now seen corresponding path program 4 times [2022-12-12 23:33:34,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:33:34,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275206111] [2022-12-12 23:33:34,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:34,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:33:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:33:34,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:33:34,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275206111] [2022-12-12 23:33:34,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275206111] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:33:34,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:33:34,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 23:33:34,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48863149] [2022-12-12 23:33:34,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:33:34,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 23:33:34,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:33:34,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 23:33:34,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 23:33:34,791 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2022-12-12 23:33:34,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 284 transitions, 3030 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:34,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:33:34,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2022-12-12 23:33:34,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:33:35,366 INFO L130 PetriNetUnfolder]: 4392/6135 cut-off events. [2022-12-12 23:33:35,367 INFO L131 PetriNetUnfolder]: For 14869/15527 co-relation queries the response was YES. [2022-12-12 23:33:35,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34772 conditions, 6135 events. 4392/6135 cut-off events. For 14869/15527 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 29731 event pairs, 280 based on Foata normal form. 187/4962 useless extension candidates. Maximal degree in co-relation 33335. Up to 5269 conditions per place. [2022-12-12 23:33:35,402 INFO L137 encePairwiseOnDemand]: 23/29 looper letters, 543 selfloop transitions, 24 changer transitions 20/595 dead transitions. [2022-12-12 23:33:35,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 595 transitions, 7509 flow [2022-12-12 23:33:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 23:33:35,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 23:33:35,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2022-12-12 23:33:35,404 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2022-12-12 23:33:35,404 INFO L295 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2022-12-12 23:33:35,404 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 595 transitions, 7509 flow [2022-12-12 23:33:35,435 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 575 transitions, 7269 flow [2022-12-12 23:33:35,435 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 575 transitions, 7269 flow [2022-12-12 23:33:35,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:35,436 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:33:35,436 INFO L214 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] [2022-12-12 23:33:35,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-12 23:33:35,436 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 23:33:35,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:33:35,436 INFO L85 PathProgramCache]: Analyzing trace with hash 274818229, now seen corresponding path program 5 times [2022-12-12 23:33:35,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:33:35,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759700814] [2022-12-12 23:33:35,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:35,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:33:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:33:35,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:33:35,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759700814] [2022-12-12 23:33:35,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759700814] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:33:35,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:33:35,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 23:33:35,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086255469] [2022-12-12 23:33:35,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:33:35,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 23:33:35,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:33:35,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 23:33:35,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-12 23:33:35,496 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2022-12-12 23:33:35,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 575 transitions, 7269 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:35,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:33:35,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2022-12-12 23:33:35,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:33:36,161 INFO L130 PetriNetUnfolder]: 4937/6926 cut-off events. [2022-12-12 23:33:36,161 INFO L131 PetriNetUnfolder]: For 25359/26599 co-relation queries the response was YES. [2022-12-12 23:33:36,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45718 conditions, 6926 events. 4937/6926 cut-off events. For 25359/26599 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34461 event pairs, 294 based on Foata normal form. 567/5967 useless extension candidates. Maximal degree in co-relation 43972. Up to 6043 conditions per place. [2022-12-12 23:33:36,200 INFO L137 encePairwiseOnDemand]: 24/29 looper letters, 594 selfloop transitions, 31 changer transitions 52/685 dead transitions. [2022-12-12 23:33:36,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 685 transitions, 9989 flow [2022-12-12 23:33:36,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 23:33:36,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 23:33:36,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2022-12-12 23:33:36,201 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5431034482758621 [2022-12-12 23:33:36,201 INFO L295 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2022-12-12 23:33:36,201 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 685 transitions, 9989 flow [2022-12-12 23:33:36,236 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 633 transitions, 9231 flow [2022-12-12 23:33:36,237 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 633 transitions, 9231 flow [2022-12-12 23:33:36,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:36,237 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:33:36,237 INFO L214 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] [2022-12-12 23:33:36,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-12 23:33:36,237 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 23:33:36,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:33:36,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1961618435, now seen corresponding path program 6 times [2022-12-12 23:33:36,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:33:36,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062389578] [2022-12-12 23:33:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:36,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:33:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:33:36,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:33:36,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062389578] [2022-12-12 23:33:36,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062389578] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:33:36,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:33:36,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 23:33:36,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422977545] [2022-12-12 23:33:36,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:33:36,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 23:33:36,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:33:36,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 23:33:36,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-12 23:33:36,366 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2022-12-12 23:33:36,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 633 transitions, 9231 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:36,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:33:36,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2022-12-12 23:33:36,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:33:37,017 INFO L130 PetriNetUnfolder]: 4362/6010 cut-off events. [2022-12-12 23:33:37,017 INFO L131 PetriNetUnfolder]: For 30142/31876 co-relation queries the response was YES. [2022-12-12 23:33:37,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45028 conditions, 6010 events. 4362/6010 cut-off events. For 30142/31876 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 27864 event pairs, 348 based on Foata normal form. 1075/5720 useless extension candidates. Maximal degree in co-relation 43653. Up to 5205 conditions per place. [2022-12-12 23:33:37,048 INFO L137 encePairwiseOnDemand]: 23/29 looper letters, 381 selfloop transitions, 50 changer transitions 52/490 dead transitions. [2022-12-12 23:33:37,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 490 transitions, 8051 flow [2022-12-12 23:33:37,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 23:33:37,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 23:33:37,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2022-12-12 23:33:37,050 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5775862068965517 [2022-12-12 23:33:37,050 INFO L295 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2022-12-12 23:33:37,050 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 490 transitions, 8051 flow [2022-12-12 23:33:37,077 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 438 transitions, 7189 flow [2022-12-12 23:33:37,077 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 438 transitions, 7189 flow [2022-12-12 23:33:37,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:37,077 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:33:37,077 INFO L214 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] [2022-12-12 23:33:37,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-12 23:33:37,078 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 23:33:37,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:33:37,078 INFO L85 PathProgramCache]: Analyzing trace with hash 736549969, now seen corresponding path program 1 times [2022-12-12 23:33:37,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:33:37,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082130180] [2022-12-12 23:33:37,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:37,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:33:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:33:37,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:33:37,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082130180] [2022-12-12 23:33:37,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082130180] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:33:37,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414276387] [2022-12-12 23:33:37,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:37,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:33:37,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:33:37,205 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:33:37,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 23:33:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:37,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:33:37,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:33:37,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:33:37,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:33:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:33:37,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414276387] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:33:37,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:33:37,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2022-12-12 23:33:37,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932242080] [2022-12-12 23:33:37,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:33:37,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 23:33:37,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:33:37,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 23:33:37,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-12 23:33:37,393 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2022-12-12 23:33:37,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 438 transitions, 7189 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:37,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:33:37,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2022-12-12 23:33:37,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:33:37,914 INFO L130 PetriNetUnfolder]: 4805/6537 cut-off events. [2022-12-12 23:33:37,914 INFO L131 PetriNetUnfolder]: For 45583/46688 co-relation queries the response was YES. [2022-12-12 23:33:37,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55099 conditions, 6537 events. 4805/6537 cut-off events. For 45583/46688 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 29910 event pairs, 482 based on Foata normal form. 475/5604 useless extension candidates. Maximal degree in co-relation 53569. Up to 5714 conditions per place. [2022-12-12 23:33:37,954 INFO L137 encePairwiseOnDemand]: 25/29 looper letters, 481 selfloop transitions, 33 changer transitions 8/529 dead transitions. [2022-12-12 23:33:37,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 529 transitions, 9727 flow [2022-12-12 23:33:37,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 23:33:37,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 23:33:37,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2022-12-12 23:33:37,955 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5431034482758621 [2022-12-12 23:33:37,956 INFO L295 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2022-12-12 23:33:37,956 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 529 transitions, 9727 flow [2022-12-12 23:33:37,986 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 521 transitions, 9577 flow [2022-12-12 23:33:37,986 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 521 transitions, 9577 flow [2022-12-12 23:33:37,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:37,987 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:33:37,987 INFO L214 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] [2022-12-12 23:33:38,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-12 23:33:38,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:33:38,192 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 23:33:38,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:33:38,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1906563918, now seen corresponding path program 1 times [2022-12-12 23:33:38,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:33:38,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429118422] [2022-12-12 23:33:38,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:38,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:33:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:33:38,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:33:38,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429118422] [2022-12-12 23:33:38,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429118422] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:33:38,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229827556] [2022-12-12 23:33:38,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:38,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:33:38,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:33:38,317 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:33:38,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 23:33:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:38,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:33:38,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:33:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:33:38,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:33:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:33:38,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229827556] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:33:38,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:33:38,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2022-12-12 23:33:38,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122231573] [2022-12-12 23:33:38,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:33:38,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 23:33:38,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:33:38,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 23:33:38,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-12 23:33:38,513 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2022-12-12 23:33:38,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 521 transitions, 9577 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:38,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:33:38,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2022-12-12 23:33:38,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:33:39,205 INFO L130 PetriNetUnfolder]: 5170/7037 cut-off events. [2022-12-12 23:33:39,205 INFO L131 PetriNetUnfolder]: For 59622/60417 co-relation queries the response was YES. [2022-12-12 23:33:39,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65787 conditions, 7037 events. 5170/7037 cut-off events. For 59622/60417 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 32496 event pairs, 488 based on Foata normal form. 301/5863 useless extension candidates. Maximal degree in co-relation 64096. Up to 6178 conditions per place. [2022-12-12 23:33:39,253 INFO L137 encePairwiseOnDemand]: 25/29 looper letters, 545 selfloop transitions, 34 changer transitions 4/589 dead transitions. [2022-12-12 23:33:39,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 589 transitions, 11959 flow [2022-12-12 23:33:39,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 23:33:39,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 23:33:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2022-12-12 23:33:39,254 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5086206896551724 [2022-12-12 23:33:39,254 INFO L295 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2022-12-12 23:33:39,254 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 589 transitions, 11959 flow [2022-12-12 23:33:39,349 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 585 transitions, 11879 flow [2022-12-12 23:33:39,350 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 585 transitions, 11879 flow [2022-12-12 23:33:39,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:39,350 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:33:39,350 INFO L214 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] [2022-12-12 23:33:39,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 23:33:39,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-12 23:33:39,551 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 23:33:39,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:33:39,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1957751141, now seen corresponding path program 2 times [2022-12-12 23:33:39,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:33:39,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108859299] [2022-12-12 23:33:39,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:39,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:33:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:33:39,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:33:39,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108859299] [2022-12-12 23:33:39,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108859299] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:33:39,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155402712] [2022-12-12 23:33:39,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:33:39,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:33:39,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:33:39,625 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:33:39,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 23:33:39,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:33:39,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:33:39,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:33:39,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:33:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:33:39,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:33:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:33:39,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155402712] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:33:39,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:33:39,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-12-12 23:33:39,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316063435] [2022-12-12 23:33:39,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:33:39,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 23:33:39,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:33:39,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 23:33:39,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-12 23:33:39,833 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2022-12-12 23:33:39,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 585 transitions, 11879 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:39,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:33:39,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2022-12-12 23:33:39,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:33:40,903 INFO L130 PetriNetUnfolder]: 6295/8535 cut-off events. [2022-12-12 23:33:40,903 INFO L131 PetriNetUnfolder]: For 90138/91497 co-relation queries the response was YES. [2022-12-12 23:33:40,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87987 conditions, 8535 events. 6295/8535 cut-off events. For 90138/91497 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 40357 event pairs, 560 based on Foata normal form. 801/7614 useless extension candidates. Maximal degree in co-relation 86135. Up to 7563 conditions per place. [2022-12-12 23:33:40,953 INFO L137 encePairwiseOnDemand]: 24/29 looper letters, 669 selfloop transitions, 77 changer transitions 8/757 dead transitions. [2022-12-12 23:33:40,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 757 transitions, 16917 flow [2022-12-12 23:33:40,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:33:40,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:33:40,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2022-12-12 23:33:40,955 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5615763546798029 [2022-12-12 23:33:40,955 INFO L295 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2022-12-12 23:33:40,955 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 757 transitions, 16917 flow [2022-12-12 23:33:40,999 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 749 transitions, 16735 flow [2022-12-12 23:33:41,000 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 749 transitions, 16735 flow [2022-12-12 23:33:41,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:41,000 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:33:41,000 INFO L214 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] [2022-12-12 23:33:41,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 23:33:41,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:33:41,207 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 23:33:41,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:33:41,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1952780422, now seen corresponding path program 2 times [2022-12-12 23:33:41,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:33:41,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479941776] [2022-12-12 23:33:41,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:41,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:33:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:33:41,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:33:41,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479941776] [2022-12-12 23:33:41,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479941776] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:33:41,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311225681] [2022-12-12 23:33:41,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:33:41,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:33:41,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:33:41,283 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:33:41,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 23:33:41,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:33:41,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:33:41,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:33:41,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:33:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:33:41,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:33:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:33:41,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311225681] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:33:41,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:33:41,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-12 23:33:41,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310352151] [2022-12-12 23:33:41,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:33:41,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 23:33:41,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:33:41,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 23:33:41,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-12 23:33:41,508 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2022-12-12 23:33:41,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 749 transitions, 16735 flow. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:41,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:33:41,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2022-12-12 23:33:41,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:33:42,465 INFO L130 PetriNetUnfolder]: 6384/8511 cut-off events. [2022-12-12 23:33:42,465 INFO L131 PetriNetUnfolder]: For 109136/110327 co-relation queries the response was YES. [2022-12-12 23:33:42,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95834 conditions, 8511 events. 6384/8511 cut-off events. For 109136/110327 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 38761 event pairs, 498 based on Foata normal form. 325/7101 useless extension candidates. Maximal degree in co-relation 94048. Up to 7568 conditions per place. [2022-12-12 23:33:42,519 INFO L137 encePairwiseOnDemand]: 22/29 looper letters, 691 selfloop transitions, 75 changer transitions 4/773 dead transitions. [2022-12-12 23:33:42,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 773 transitions, 18779 flow [2022-12-12 23:33:42,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:33:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:33:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2022-12-12 23:33:42,520 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4689655172413793 [2022-12-12 23:33:42,520 INFO L295 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2022-12-12 23:33:42,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 773 transitions, 18779 flow [2022-12-12 23:33:42,569 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 769 transitions, 18683 flow [2022-12-12 23:33:42,569 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 769 transitions, 18683 flow [2022-12-12 23:33:42,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:42,569 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:33:42,569 INFO L214 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] [2022-12-12 23:33:42,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 23:33:42,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:33:42,774 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 23:33:42,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:33:42,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1720751885, now seen corresponding path program 3 times [2022-12-12 23:33:42,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:33:42,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148927897] [2022-12-12 23:33:42,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:42,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:33:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:33:42,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:33:42,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148927897] [2022-12-12 23:33:42,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148927897] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:33:42,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874663161] [2022-12-12 23:33:42,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:33:42,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:33:42,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:33:42,995 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:33:42,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 23:33:43,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:33:43,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:33:43,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:33:43,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:33:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:33:43,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 23:33:43,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874663161] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:33:43,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 23:33:43,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-12-12 23:33:43,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130811816] [2022-12-12 23:33:43,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:33:43,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 23:33:43,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:33:43,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 23:33:43,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:33:43,138 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2022-12-12 23:33:43,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 769 transitions, 18683 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:43,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:33:43,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2022-12-12 23:33:43,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:33:44,217 INFO L130 PetriNetUnfolder]: 6538/8605 cut-off events. [2022-12-12 23:33:44,217 INFO L131 PetriNetUnfolder]: For 135376/137429 co-relation queries the response was YES. [2022-12-12 23:33:44,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105202 conditions, 8605 events. 6538/8605 cut-off events. For 135376/137429 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 38046 event pairs, 560 based on Foata normal form. 771/7637 useless extension candidates. Maximal degree in co-relation 103524. Up to 7702 conditions per place. [2022-12-12 23:33:44,433 INFO L137 encePairwiseOnDemand]: 23/29 looper letters, 682 selfloop transitions, 84 changer transitions 8/783 dead transitions. [2022-12-12 23:33:44,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 783 transitions, 20555 flow [2022-12-12 23:33:44,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 23:33:44,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 23:33:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2022-12-12 23:33:44,440 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5775862068965517 [2022-12-12 23:33:44,441 INFO L295 CegarLoopForPetriNet]: 38 programPoint places, 37 predicate places. [2022-12-12 23:33:44,441 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 783 transitions, 20555 flow [2022-12-12 23:33:44,495 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 775 transitions, 20341 flow [2022-12-12 23:33:44,496 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 775 transitions, 20341 flow [2022-12-12 23:33:44,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:44,496 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:33:44,496 INFO L214 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] [2022-12-12 23:33:44,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-12 23:33:44,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-12 23:33:44,706 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 23:33:44,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:33:44,707 INFO L85 PathProgramCache]: Analyzing trace with hash 156808547, now seen corresponding path program 1 times [2022-12-12 23:33:44,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:33:44,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903306537] [2022-12-12 23:33:44,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:44,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:33:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:33:44,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:33:44,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903306537] [2022-12-12 23:33:44,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903306537] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:33:44,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551457638] [2022-12-12 23:33:44,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:44,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:33:44,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:33:44,826 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:33:44,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 23:33:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:44,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:33:44,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:33:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:33:44,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:33:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:33:44,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551457638] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:33:44,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:33:44,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2022-12-12 23:33:44,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584933184] [2022-12-12 23:33:44,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:33:44,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 23:33:44,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:33:44,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 23:33:44,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-12 23:33:44,967 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2022-12-12 23:33:44,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 775 transitions, 20341 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:44,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:33:44,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2022-12-12 23:33:44,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:33:46,230 INFO L130 PetriNetUnfolder]: 7771/10189 cut-off events. [2022-12-12 23:33:46,230 INFO L131 PetriNetUnfolder]: For 165653/166945 co-relation queries the response was YES. [2022-12-12 23:33:46,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134618 conditions, 10189 events. 7771/10189 cut-off events. For 165653/166945 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 45484 event pairs, 588 based on Foata normal form. 213/8444 useless extension candidates. Maximal degree in co-relation 132762. Up to 9184 conditions per place. [2022-12-12 23:33:46,299 INFO L137 encePairwiseOnDemand]: 24/29 looper letters, 974 selfloop transitions, 58 changer transitions 0/1043 dead transitions. [2022-12-12 23:33:46,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 1043 transitions, 29435 flow [2022-12-12 23:33:46,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 23:33:46,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 23:33:46,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2022-12-12 23:33:46,300 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5431034482758621 [2022-12-12 23:33:46,301 INFO L295 CegarLoopForPetriNet]: 38 programPoint places, 40 predicate places. [2022-12-12 23:33:46,301 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 1043 transitions, 29435 flow [2022-12-12 23:33:46,367 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 1043 transitions, 29435 flow [2022-12-12 23:33:46,368 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 1043 transitions, 29435 flow [2022-12-12 23:33:46,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:46,368 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:33:46,368 INFO L214 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] [2022-12-12 23:33:46,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-12 23:33:46,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:33:46,573 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 23:33:46,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:33:46,573 INFO L85 PathProgramCache]: Analyzing trace with hash -354659487, now seen corresponding path program 2 times [2022-12-12 23:33:46,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:33:46,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771648571] [2022-12-12 23:33:46,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:46,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:33:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:33:46,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:33:46,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771648571] [2022-12-12 23:33:46,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771648571] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:33:46,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849744089] [2022-12-12 23:33:46,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:33:46,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:33:46,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:33:46,665 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:33:46,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 23:33:46,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:33:46,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:33:46,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:33:46,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:33:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:33:46,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:33:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:33:46,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849744089] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:33:46,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:33:46,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2022-12-12 23:33:46,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497585366] [2022-12-12 23:33:46,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:33:46,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-12 23:33:46,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:33:46,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-12 23:33:46,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-12 23:33:46,843 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 29 [2022-12-12 23:33:46,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 1043 transitions, 29435 flow. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:46,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:33:46,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 29 [2022-12-12 23:33:46,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:33:49,631 INFO L130 PetriNetUnfolder]: 11101/14559 cut-off events. [2022-12-12 23:33:49,631 INFO L131 PetriNetUnfolder]: For 220923/221103 co-relation queries the response was YES. [2022-12-12 23:33:49,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206967 conditions, 14559 events. 11101/14559 cut-off events. For 220923/221103 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 67863 event pairs, 632 based on Foata normal form. 104/12042 useless extension candidates. Maximal degree in co-relation 204736. Up to 13193 conditions per place. [2022-12-12 23:33:49,758 INFO L137 encePairwiseOnDemand]: 21/29 looper letters, 1426 selfloop transitions, 409 changer transitions 4/1841 dead transitions. [2022-12-12 23:33:49,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 1841 transitions, 55383 flow [2022-12-12 23:33:49,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 23:33:49,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 23:33:49,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 194 transitions. [2022-12-12 23:33:49,759 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4459770114942529 [2022-12-12 23:33:49,760 INFO L295 CegarLoopForPetriNet]: 38 programPoint places, 54 predicate places. [2022-12-12 23:33:49,760 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 1841 transitions, 55383 flow [2022-12-12 23:33:49,888 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 1837 transitions, 55263 flow [2022-12-12 23:33:49,888 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 1837 transitions, 55263 flow [2022-12-12 23:33:49,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:49,888 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:33:49,888 INFO L214 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] [2022-12-12 23:33:49,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-12 23:33:50,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:33:50,093 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 23:33:50,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:33:50,094 INFO L85 PathProgramCache]: Analyzing trace with hash -443086719, now seen corresponding path program 3 times [2022-12-12 23:33:50,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:33:50,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53828303] [2022-12-12 23:33:50,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:50,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:33:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:33:50,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:33:50,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53828303] [2022-12-12 23:33:50,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53828303] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:33:50,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653476268] [2022-12-12 23:33:50,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:33:50,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:33:50,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:33:50,227 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:33:50,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-12 23:33:50,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:33:50,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:33:50,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:33:50,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:33:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:33:50,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:33:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:33:50,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653476268] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:33:50,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:33:50,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-12 23:33:50,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003328961] [2022-12-12 23:33:50,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:33:50,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-12 23:33:50,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:33:50,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-12 23:33:50,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-12 23:33:50,450 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 29 [2022-12-12 23:33:50,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 1837 transitions, 55263 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:50,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:33:50,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 29 [2022-12-12 23:33:50,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:33:54,089 INFO L130 PetriNetUnfolder]: 11712/15259 cut-off events. [2022-12-12 23:33:54,089 INFO L131 PetriNetUnfolder]: For 248732/248922 co-relation queries the response was YES. [2022-12-12 23:33:54,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232211 conditions, 15259 events. 11712/15259 cut-off events. For 248732/248922 co-relation queries the response was YES. Maximal size of possible extension queue 739. Compared 70213 event pairs, 650 based on Foata normal form. 104/12656 useless extension candidates. Maximal degree in co-relation 229866. Up to 13881 conditions per place. [2022-12-12 23:33:54,202 INFO L137 encePairwiseOnDemand]: 21/29 looper letters, 1546 selfloop transitions, 430 changer transitions 0/1978 dead transitions. [2022-12-12 23:33:54,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 1978 transitions, 63402 flow [2022-12-12 23:33:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 23:33:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 23:33:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2022-12-12 23:33:54,204 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.42528735632183906 [2022-12-12 23:33:54,204 INFO L295 CegarLoopForPetriNet]: 38 programPoint places, 61 predicate places. [2022-12-12 23:33:54,204 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 1978 transitions, 63402 flow [2022-12-12 23:33:54,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 1978 transitions, 63402 flow [2022-12-12 23:33:54,343 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 1978 transitions, 63402 flow [2022-12-12 23:33:54,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:54,344 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:33:54,344 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:33:54,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-12 23:33:54,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-12 23:33:54,545 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 23:33:54,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:33:54,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1489414968, now seen corresponding path program 1 times [2022-12-12 23:33:54,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:33:54,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116301318] [2022-12-12 23:33:54,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:54,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:33:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:33:54,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:33:54,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116301318] [2022-12-12 23:33:54,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116301318] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:33:54,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578797039] [2022-12-12 23:33:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:54,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:33:54,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:33:54,872 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:33:54,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-12 23:33:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:54,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-12 23:33:54,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:33:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:33:55,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:33:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:33:55,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578797039] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:33:55,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:33:55,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 2, 2] total 5 [2022-12-12 23:33:55,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16819494] [2022-12-12 23:33:55,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:33:55,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 23:33:55,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:33:55,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 23:33:55,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-12 23:33:55,105 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2022-12-12 23:33:55,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 1978 transitions, 63402 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:33:55,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:33:55,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2022-12-12 23:33:55,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:34:01,798 INFO L130 PetriNetUnfolder]: 22860/30481 cut-off events. [2022-12-12 23:34:01,798 INFO L131 PetriNetUnfolder]: For 570440/570708 co-relation queries the response was YES. [2022-12-12 23:34:01,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492055 conditions, 30481 events. 22860/30481 cut-off events. For 570440/570708 co-relation queries the response was YES. Maximal size of possible extension queue 1376. Compared 164635 event pairs, 816 based on Foata normal form. 1384/26391 useless extension candidates. Maximal degree in co-relation 486984. Up to 27779 conditions per place. [2022-12-12 23:34:02,195 INFO L137 encePairwiseOnDemand]: 23/29 looper letters, 2981 selfloop transitions, 689 changer transitions 31/3739 dead transitions. [2022-12-12 23:34:02,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 3739 transitions, 127915 flow [2022-12-12 23:34:02,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:34:02,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:34:02,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2022-12-12 23:34:02,196 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6758620689655173 [2022-12-12 23:34:02,196 INFO L295 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2022-12-12 23:34:02,196 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 3739 transitions, 127915 flow [2022-12-12 23:34:02,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 3708 transitions, 126813 flow [2022-12-12 23:34:02,455 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 3708 transitions, 126813 flow [2022-12-12 23:34:02,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:34:02,455 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:34:02,455 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:34:02,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-12 23:34:02,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-12 23:34:02,661 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 23:34:02,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:34:02,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1453693960, now seen corresponding path program 2 times [2022-12-12 23:34:02,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:34:02,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818370290] [2022-12-12 23:34:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:34:02,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:34:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:34:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:34:02,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:34:02,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818370290] [2022-12-12 23:34:02,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818370290] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:34:02,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083475260] [2022-12-12 23:34:02,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:34:02,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:34:02,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:34:02,790 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:34:02,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-12 23:34:02,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:34:02,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:34:02,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-12 23:34:02,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:34:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:34:02,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:34:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:34:03,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083475260] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:34:03,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:34:03,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-12 23:34:03,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365801251] [2022-12-12 23:34:03,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:34:03,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 23:34:03,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:34:03,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 23:34:03,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-12 23:34:03,012 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2022-12-12 23:34:03,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 3708 transitions, 126813 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:34:03,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:34:03,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2022-12-12 23:34:03,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:34:26,578 INFO L130 PetriNetUnfolder]: 43276/57768 cut-off events. [2022-12-12 23:34:26,578 INFO L131 PetriNetUnfolder]: For 1181510/1181906 co-relation queries the response was YES. [2022-12-12 23:34:26,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 988165 conditions, 57768 events. 43276/57768 cut-off events. For 1181510/1181906 co-relation queries the response was YES. Maximal size of possible extension queue 2605. Compared 340234 event pairs, 816 based on Foata normal form. 1512/48628 useless extension candidates. Maximal degree in co-relation 979541. Up to 52880 conditions per place. [2022-12-12 23:34:27,300 INFO L137 encePairwiseOnDemand]: 22/29 looper letters, 4896 selfloop transitions, 2005 changer transitions 31/6952 dead transitions. [2022-12-12 23:34:27,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 6952 transitions, 251930 flow [2022-12-12 23:34:27,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 23:34:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 23:34:27,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2022-12-12 23:34:27,302 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7471264367816092 [2022-12-12 23:34:27,307 INFO L295 CegarLoopForPetriNet]: 38 programPoint places, 70 predicate places. [2022-12-12 23:34:27,307 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 6952 transitions, 251930 flow [2022-12-12 23:34:27,814 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 6921 transitions, 250766 flow [2022-12-12 23:34:27,816 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 6921 transitions, 250766 flow [2022-12-12 23:34:27,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:34:27,817 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:34:27,817 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:34:27,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-12 23:34:28,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-12 23:34:28,021 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 23:34:28,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:34:28,022 INFO L85 PathProgramCache]: Analyzing trace with hash -150755831, now seen corresponding path program 3 times [2022-12-12 23:34:28,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:34:28,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541061311] [2022-12-12 23:34:28,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:34:28,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:34:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:34:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:34:28,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:34:28,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541061311] [2022-12-12 23:34:28,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541061311] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:34:28,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575142388] [2022-12-12 23:34:28,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:34:28,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:34:28,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:34:28,125 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:34:28,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-12 23:34:28,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:34:28,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:34:28,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 23:34:28,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:34:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:34:28,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:34:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:34:28,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575142388] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:34:28,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:34:28,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-12-12 23:34:28,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420437229] [2022-12-12 23:34:28,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:34:28,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 23:34:28,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:34:28,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 23:34:28,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-12-12 23:34:28,311 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 29 [2022-12-12 23:34:28,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 6921 transitions, 250766 flow. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:34:28,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:34:28,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 29 [2022-12-12 23:34:28,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:37:22,533 INFO L130 PetriNetUnfolder]: 113948/155805 cut-off events. [2022-12-12 23:37:22,534 INFO L131 PetriNetUnfolder]: For 2058367/2060601 co-relation queries the response was YES. [2022-12-12 23:37:22,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2846333 conditions, 155805 events. 113948/155805 cut-off events. For 2058367/2060601 co-relation queries the response was YES. Maximal size of possible extension queue 5833. Compared 1071741 event pairs, 700 based on Foata normal form. 1518/127158 useless extension candidates. Maximal degree in co-relation 2819998. Up to 145229 conditions per place. [2022-12-12 23:37:24,205 INFO L137 encePairwiseOnDemand]: 20/29 looper letters, 23212 selfloop transitions, 5365 changer transitions 338/28926 dead transitions. [2022-12-12 23:37:24,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 28926 transitions, 1107278 flow [2022-12-12 23:37:24,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-12 23:37:24,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-12-12 23:37:24,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 655 transitions. [2022-12-12 23:37:24,209 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4805575935436537 [2022-12-12 23:37:24,210 INFO L295 CegarLoopForPetriNet]: 38 programPoint places, 116 predicate places. [2022-12-12 23:37:24,210 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 28926 transitions, 1107278 flow [2022-12-12 23:37:26,065 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 28588 transitions, 1094368 flow [2022-12-12 23:37:26,065 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 28588 transitions, 1094368 flow [2022-12-12 23:37:26,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:37:26,066 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:37:26,066 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:37:26,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-12 23:37:26,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-12 23:37:26,271 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-12 23:37:26,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:37:26,272 INFO L85 PathProgramCache]: Analyzing trace with hash -388211831, now seen corresponding path program 4 times [2022-12-12 23:37:26,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:37:26,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577378164] [2022-12-12 23:37:26,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:37:26,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:37:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:37:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:37:26,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:37:26,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577378164] [2022-12-12 23:37:26,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577378164] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:37:26,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032191107] [2022-12-12 23:37:26,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:37:26,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:37:26,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:37:26,532 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:37:26,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-12 23:37:26,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:37:26,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:37:26,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 23:37:26,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:37:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:37:26,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:37:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:37:26,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032191107] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:37:26,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:37:26,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-12-12 23:37:26,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808133380] [2022-12-12 23:37:26,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:37:26,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 23:37:26,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:37:26,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 23:37:26,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-12 23:37:26,916 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2022-12-12 23:37:26,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 28588 transitions, 1094368 flow. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:37:26,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:37:26,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2022-12-12 23:37:26,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-12-12 23:47:35,222 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 23:47:35,233 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 23:47:35,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-12 23:47:35,500 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2022-12-12 23:47:35,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-12 23:47:35,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:47:35,706 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (14states, 2/29 universal loopers) in iteration 19,while PetriNetUnfolder was constructing finite prefix that currently has 2005885 conditions, 104872 events (79198/104871 cut-off events. For 1847982/1848944 co-relation queries the response was YES. Maximal size of possible extension queue 9020. Compared 714646 event pairs, 259 based on Foata normal form. 166/91906 useless extension candidates. Maximal degree in co-relation 2005053. Up to 97101 conditions per place.). [2022-12-12 23:47:35,707 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 5 remaining) [2022-12-12 23:47:35,707 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-12-12 23:47:35,707 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2022-12-12 23:47:35,707 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2022-12-12 23:47:35,708 INFO L445 BasicCegarLoop]: Path program histogram: [6, 4, 3, 3, 2, 1] [2022-12-12 23:47:35,710 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 23:47:35,710 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 23:47:35,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 11:47:35 BasicIcfg [2022-12-12 23:47:35,714 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 23:47:35,714 INFO L158 Benchmark]: Toolchain (without parser) took 847083.76ms. Allocated memory was 191.9MB in the beginning and 4.5GB in the end (delta: 4.3GB). Free memory was 168.8MB in the beginning and 2.4GB in the end (delta: -2.2GB). Peak memory consumption was 4.2GB. Max. memory is 8.0GB. [2022-12-12 23:47:35,714 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 191.9MB. Free memory is still 170.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 23:47:35,715 INFO L158 Benchmark]: CACSL2BoogieTranslator took 154.91ms. Allocated memory is still 191.9MB. Free memory was 168.8MB in the beginning and 156.4MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-12-12 23:47:35,715 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.17ms. Allocated memory is still 191.9MB. Free memory was 156.4MB in the beginning and 154.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 23:47:35,716 INFO L158 Benchmark]: Boogie Preprocessor took 17.74ms. Allocated memory is still 191.9MB. Free memory was 154.7MB in the beginning and 153.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-12 23:47:35,716 INFO L158 Benchmark]: RCFGBuilder took 392.18ms. Allocated memory is still 191.9MB. Free memory was 153.0MB in the beginning and 136.3MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2022-12-12 23:47:35,716 INFO L158 Benchmark]: TraceAbstraction took 846490.65ms. Allocated memory was 191.9MB in the beginning and 4.5GB in the end (delta: 4.3GB). Free memory was 135.2MB in the beginning and 2.4GB in the end (delta: -2.2GB). Peak memory consumption was 4.1GB. Max. memory is 8.0GB. [2022-12-12 23:47:35,720 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 191.9MB. Free memory is still 170.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 154.91ms. Allocated memory is still 191.9MB. Free memory was 168.8MB in the beginning and 156.4MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.17ms. Allocated memory is still 191.9MB. Free memory was 156.4MB in the beginning and 154.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.74ms. Allocated memory is still 191.9MB. Free memory was 154.7MB in the beginning and 153.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 392.18ms. Allocated memory is still 191.9MB. Free memory was 153.0MB in the beginning and 136.3MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 846490.65ms. Allocated memory was 191.9MB in the beginning and 4.5GB in the end (delta: 4.3GB). Free memory was 135.2MB in the beginning and 2.4GB in the end (delta: -2.2GB). Peak memory consumption was 4.1GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.2s, 113 PlacesBefore, 38 PlacesAfterwards, 110 TransitionsBefore, 29 TransitionsAfterwards, 2520 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 34 TrivialYvCompositions, 41 ConcurrentYvCompositions, 6 ChoiceCompositions, 81 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 1305, independent: 1298, independent conditional: 1298, independent unconditional: 0, dependent: 7, dependent conditional: 7, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 1305, independent: 1298, independent conditional: 0, independent unconditional: 1298, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 1305, independent: 1298, independent conditional: 0, independent unconditional: 1298, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 1305, independent: 1298, independent conditional: 0, independent unconditional: 1298, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1305, independent: 1298, independent conditional: 0, independent unconditional: 1298, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1305, independent: 1296, independent conditional: 0, independent unconditional: 1296, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 9, independent: 2, independent conditional: 0, independent unconditional: 2, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 34, independent: 4, independent conditional: 0, independent unconditional: 4, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1305, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 1305, unknown conditional: 0, unknown unconditional: 1305] , Statistics on independence cache: Total cache size (in pairs): 2091, Positive cache size: 2084, Positive conditional cache size: 0, Positive unconditional cache size: 2084, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 101]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (14states, 2/29 universal loopers) in iteration 19,while PetriNetUnfolder was constructing finite prefix that currently has 2005885 conditions, 104872 events (79198/104871 cut-off events. For 1847982/1848944 co-relation queries the response was YES. Maximal size of possible extension queue 9020. Compared 714646 event pairs, 259 based on Foata normal form. 166/91906 useless extension candidates. Maximal degree in co-relation 2005053. Up to 97101 conditions per place.). - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (14states, 2/29 universal loopers) in iteration 19,while PetriNetUnfolder was constructing finite prefix that currently has 2005885 conditions, 104872 events (79198/104871 cut-off events. For 1847982/1848944 co-relation queries the response was YES. Maximal size of possible extension queue 9020. Compared 714646 event pairs, 259 based on Foata normal form. 166/91906 useless extension candidates. Maximal degree in co-relation 2005053. Up to 97101 conditions per place.). - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (14states, 2/29 universal loopers) in iteration 19,while PetriNetUnfolder was constructing finite prefix that currently has 2005885 conditions, 104872 events (79198/104871 cut-off events. For 1847982/1848944 co-relation queries the response was YES. Maximal size of possible extension queue 9020. Compared 714646 event pairs, 259 based on Foata normal form. 166/91906 useless extension candidates. Maximal degree in co-relation 2005053. Up to 97101 conditions per place.). - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (14states, 2/29 universal loopers) in iteration 19,while PetriNetUnfolder was constructing finite prefix that currently has 2005885 conditions, 104872 events (79198/104871 cut-off events. For 1847982/1848944 co-relation queries the response was YES. Maximal size of possible extension queue 9020. Compared 714646 event pairs, 259 based on Foata normal form. 166/91906 useless extension candidates. Maximal degree in co-relation 2005053. Up to 97101 conditions per place.). - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (14states, 2/29 universal loopers) in iteration 19,while PetriNetUnfolder was constructing finite prefix that currently has 2005885 conditions, 104872 events (79198/104871 cut-off events. For 1847982/1848944 co-relation queries the response was YES. Maximal size of possible extension queue 9020. Compared 714646 event pairs, 259 based on Foata normal form. 166/91906 useless extension candidates. Maximal degree in co-relation 2005053. Up to 97101 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 157 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 3.4s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 846.3s, OverallIterations: 19, TraceHistogramMax: 2, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 831.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1500 SdHoareTripleChecker+Valid, 3.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1500 mSDsluCounter, 299 SdHoareTripleChecker+Invalid, 2.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 213 mSDsCounter, 113 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5769 IncrementalHoareTripleChecker+Invalid, 5882 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 113 mSolverCounterUnsat, 86 mSDtfsCounter, 5769 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 868 GetRequests, 674 SyntacticMatches, 22 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1094368occurred in iteration=18, InterpolantAutomatonStates: 141, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.4s AutomataMinimizationTime, 18 MinimizatonAttempts, 18757 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 855 NumberOfCodeBlocks, 853 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 1123 ConstructedInterpolants, 0 QuantifiedInterpolants, 5886 SizeOfPredicates, 33 NumberOfNonLiveVariables, 2734 ConjunctsInSsa, 107 ConjunctsInUnsatCore, 42 InterpolantComputations, 11 PerfectInterpolantSequences, 68/121 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 could not prove your program: Timeout Completed graceful shutdown