/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-NoLbe.epf --traceabstraction.use.on-demand.petri.net.difference true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-11 22:04:26,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-11 22:04:26,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-11 22:04:26,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-11 22:04:26,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-11 22:04:26,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-11 22:04:26,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-11 22:04:26,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-11 22:04:26,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-11 22:04:26,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-11 22:04:26,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-11 22:04:26,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-11 22:04:26,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-11 22:04:26,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-11 22:04:26,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-11 22:04:26,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-11 22:04:26,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-11 22:04:26,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-11 22:04:26,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-11 22:04:26,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-11 22:04:26,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-11 22:04:26,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-11 22:04:26,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-11 22:04:26,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-11 22:04:26,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-11 22:04:26,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-11 22:04:26,122 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-11 22:04:26,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-11 22:04:26,124 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-11 22:04:26,124 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-11 22:04:26,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-11 22:04:26,126 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-11 22:04:26,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-11 22:04:26,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-11 22:04:26,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-11 22:04:26,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-11 22:04:26,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-11 22:04:26,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-11 22:04:26,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-11 22:04:26,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-11 22:04:26,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-11 22:04:26,130 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-NoLbe.epf [2022-12-11 22:04:26,155 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-11 22:04:26,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-11 22:04:26,156 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-11 22:04:26,157 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-11 22:04:26,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-11 22:04:26,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-11 22:04:26,158 INFO L138 SettingsManager]: * Use SBE=true [2022-12-11 22:04:26,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-11 22:04:26,159 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-11 22:04:26,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-11 22:04:26,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-11 22:04:26,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-11 22:04:26,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-11 22:04:26,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-11 22:04:26,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-11 22:04:26,160 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-11 22:04:26,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-11 22:04:26,160 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-11 22:04:26,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-11 22:04:26,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-11 22:04:26,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-11 22:04:26,160 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-11 22:04:26,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-11 22:04:26,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-11 22:04:26,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-11 22:04:26,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-11 22:04:26,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-11 22:04:26,161 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-11 22:04:26,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-11 22:04:26,161 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-11 22:04:26,161 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-11 22:04:26,161 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true [2022-12-11 22:04:26,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-11 22:04:26,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-11 22:04:26,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-11 22:04:26,464 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-11 22:04:26,465 INFO L275 PluginConnector]: CDTParser initialized [2022-12-11 22:04:26,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2022-12-11 22:04:27,603 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-11 22:04:27,775 INFO L351 CDTParser]: Found 1 translation units. [2022-12-11 22:04:27,776 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2022-12-11 22:04:27,780 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/600f7987b/fd12ccaa78a34e979e51f55b2ab1735d/FLAG4346ba21a [2022-12-11 22:04:27,793 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/600f7987b/fd12ccaa78a34e979e51f55b2ab1735d [2022-12-11 22:04:27,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-11 22:04:27,796 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-11 22:04:27,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-11 22:04:27,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-11 22:04:27,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-11 22:04:27,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.12 10:04:27" (1/1) ... [2022-12-11 22:04:27,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17e254c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 10:04:27, skipping insertion in model container [2022-12-11 22:04:27,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.12 10:04:27" (1/1) ... [2022-12-11 22:04:27,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-11 22:04:27,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-11 22:04:27,937 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 22:04:27,938 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 22:04:27,942 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 22:04:27,943 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 22:04:27,951 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-figure3.wvr.c[2121,2134] [2022-12-11 22:04:27,954 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-11 22:04:27,962 INFO L203 MainTranslator]: Completed pre-run [2022-12-11 22:04:27,975 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 22:04:27,976 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 22:04:27,978 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 22:04:27,979 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 22:04:27,985 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-figure3.wvr.c[2121,2134] [2022-12-11 22:04:27,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-11 22:04:28,001 INFO L208 MainTranslator]: Completed translation [2022-12-11 22:04:28,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 10:04:28 WrapperNode [2022-12-11 22:04:28,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-11 22:04:28,002 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-11 22:04:28,003 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-11 22:04:28,003 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-11 22:04:28,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 10:04:28" (1/1) ... [2022-12-11 22:04:28,013 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 10:04:28" (1/1) ... [2022-12-11 22:04:28,032 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-12-11 22:04:28,032 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-11 22:04:28,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-11 22:04:28,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-11 22:04:28,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-11 22:04:28,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 10:04:28" (1/1) ... [2022-12-11 22:04:28,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 10:04:28" (1/1) ... [2022-12-11 22:04:28,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 10:04:28" (1/1) ... [2022-12-11 22:04:28,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 10:04:28" (1/1) ... [2022-12-11 22:04:28,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 10:04:28" (1/1) ... [2022-12-11 22:04:28,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 10:04:28" (1/1) ... [2022-12-11 22:04:28,059 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 10:04:28" (1/1) ... [2022-12-11 22:04:28,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 10:04:28" (1/1) ... [2022-12-11 22:04:28,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-11 22:04:28,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-11 22:04:28,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-11 22:04:28,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-11 22:04:28,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 10:04:28" (1/1) ... [2022-12-11 22:04:28,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-11 22:04:28,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:04:28,093 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) [2022-12-11 22:04:28,126 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 [2022-12-11 22:04:28,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-11 22:04:28,146 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-11 22:04:28,146 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-11 22:04:28,146 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-11 22:04:28,147 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-11 22:04:28,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-11 22:04:28,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-11 22:04:28,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-11 22:04:28,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-11 22:04:28,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-11 22:04:28,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-11 22:04:28,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-11 22:04:28,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-11 22:04:28,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-11 22:04:28,149 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-11 22:04:28,234 INFO L236 CfgBuilder]: Building ICFG [2022-12-11 22:04:28,235 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-11 22:04:28,419 INFO L277 CfgBuilder]: Performing block encoding [2022-12-11 22:04:28,444 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-11 22:04:28,445 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-11 22:04:28,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.12 10:04:28 BoogieIcfgContainer [2022-12-11 22:04:28,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-11 22:04:28,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-11 22:04:28,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-11 22:04:28,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-11 22:04:28,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.12 10:04:27" (1/3) ... [2022-12-11 22:04:28,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b0017af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.12 10:04:28, skipping insertion in model container [2022-12-11 22:04:28,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 10:04:28" (2/3) ... [2022-12-11 22:04:28,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b0017af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.12 10:04:28, skipping insertion in model container [2022-12-11 22:04:28,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.12 10:04:28" (3/3) ... [2022-12-11 22:04:28,456 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2022-12-11 22:04:28,469 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-11 22:04:28,469 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-11 22:04:28,469 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-11 22:04:28,555 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-11 22:04:28,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 80 transitions, 176 flow [2022-12-11 22:04:28,661 INFO L130 PetriNetUnfolder]: 6/78 cut-off events. [2022-12-11 22:04:28,662 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-11 22:04:28,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 6/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2022-12-11 22:04:28,668 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 80 transitions, 176 flow [2022-12-11 22:04:28,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 70 transitions, 152 flow [2022-12-11 22:04:28,696 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-11 22:04:28,704 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;@26968bdf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-11 22:04:28,705 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-11 22:04:28,740 INFO L130 PetriNetUnfolder]: 6/69 cut-off events. [2022-12-11 22:04:28,740 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-11 22:04:28,741 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:04:28,742 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:04:28,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:04:28,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:04:28,750 INFO L85 PathProgramCache]: Analyzing trace with hash 478861800, now seen corresponding path program 1 times [2022-12-11 22:04:28,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:04:28,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045763489] [2022-12-11 22:04:28,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:04:28,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:04:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:04:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:29,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:04:29,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045763489] [2022-12-11 22:04:29,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045763489] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 22:04:29,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 22:04:29,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-11 22:04:29,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314866767] [2022-12-11 22:04:29,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 22:04:29,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-11 22:04:29,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:04:29,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-11 22:04:29,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-11 22:04:29,314 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 80 [2022-12-11 22:04:29,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 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) [2022-12-11 22:04:29,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:04:29,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 80 [2022-12-11 22:04:29,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:04:29,416 INFO L130 PetriNetUnfolder]: 8/107 cut-off events. [2022-12-11 22:04:29,416 INFO L131 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-12-11 22:04:29,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 107 events. 8/107 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 179 event pairs, 1 based on Foata normal form. 17/114 useless extension candidates. Maximal degree in co-relation 61. Up to 19 conditions per place. [2022-12-11 22:04:29,418 INFO L137 encePairwiseOnDemand]: 68/80 looper letters, 15 selfloop transitions, 2 changer transitions 8/74 dead transitions. [2022-12-11 22:04:29,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 74 transitions, 219 flow [2022-12-11 22:04:29,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-11 22:04:29,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-11 22:04:29,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 440 transitions. [2022-12-11 22:04:29,434 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2022-12-11 22:04:29,437 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 6 predicate places. [2022-12-11 22:04:29,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 74 transitions, 219 flow [2022-12-11 22:04:29,440 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 66 transitions, 181 flow [2022-12-11 22:04:29,441 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 181 flow [2022-12-11 22:04:29,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 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) [2022-12-11 22:04:29,441 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:04:29,441 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:04:29,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-11 22:04:29,442 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:04:29,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:04:29,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1450771332, now seen corresponding path program 1 times [2022-12-11 22:04:29,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:04:29,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208187076] [2022-12-11 22:04:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:04:29,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:04:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:04:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:29,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:04:29,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208187076] [2022-12-11 22:04:29,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208187076] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 22:04:29,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 22:04:29,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-11 22:04:29,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125736791] [2022-12-11 22:04:29,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 22:04:29,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-11 22:04:29,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:04:29,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-11 22:04:29,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-11 22:04:29,567 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 80 [2022-12-11 22:04:29,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 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) [2022-12-11 22:04:29,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:04:29,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 80 [2022-12-11 22:04:29,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:04:29,656 INFO L130 PetriNetUnfolder]: 74/273 cut-off events. [2022-12-11 22:04:29,656 INFO L131 PetriNetUnfolder]: For 102/107 co-relation queries the response was YES. [2022-12-11 22:04:29,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 273 events. 74/273 cut-off events. For 102/107 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1129 event pairs, 30 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 381. Up to 89 conditions per place. [2022-12-11 22:04:29,659 INFO L137 encePairwiseOnDemand]: 73/80 looper letters, 29 selfloop transitions, 5 changer transitions 2/84 dead transitions. [2022-12-11 22:04:29,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 84 transitions, 306 flow [2022-12-11 22:04:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-11 22:04:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-11 22:04:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 385 transitions. [2022-12-11 22:04:29,660 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8020833333333334 [2022-12-11 22:04:29,661 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2022-12-11 22:04:29,661 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 84 transitions, 306 flow [2022-12-11 22:04:29,662 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 82 transitions, 298 flow [2022-12-11 22:04:29,662 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 82 transitions, 298 flow [2022-12-11 22:04:29,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 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) [2022-12-11 22:04:29,663 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:04:29,663 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:04:29,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-11 22:04:29,663 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:04:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:04:29,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1917448334, now seen corresponding path program 2 times [2022-12-11 22:04:29,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:04:29,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679529469] [2022-12-11 22:04:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:04:29,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:04:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:04:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:29,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:04:29,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679529469] [2022-12-11 22:04:29,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679529469] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:04:29,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833845280] [2022-12-11 22:04:29,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-11 22:04:29,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:04:29,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:04:29,842 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) [2022-12-11 22:04:29,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-11 22:04:29,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-11 22:04:29,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 22:04:29,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-11 22:04:29,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:04:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:30,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-11 22:04:30,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833845280] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 22:04:30,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-11 22:04:30,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-12-11 22:04:30,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207848654] [2022-12-11 22:04:30,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 22:04:30,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-11 22:04:30,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:04:30,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-11 22:04:30,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-11 22:04:30,129 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 80 [2022-12-11 22:04:30,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 298 flow. Second operand has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 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) [2022-12-11 22:04:30,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:04:30,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 80 [2022-12-11 22:04:30,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:04:30,209 INFO L130 PetriNetUnfolder]: 97/325 cut-off events. [2022-12-11 22:04:30,209 INFO L131 PetriNetUnfolder]: For 217/254 co-relation queries the response was YES. [2022-12-11 22:04:30,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 325 events. 97/325 cut-off events. For 217/254 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1448 event pairs, 39 based on Foata normal form. 3/289 useless extension candidates. Maximal degree in co-relation 599. Up to 116 conditions per place. [2022-12-11 22:04:30,215 INFO L137 encePairwiseOnDemand]: 75/80 looper letters, 33 selfloop transitions, 5 changer transitions 4/98 dead transitions. [2022-12-11 22:04:30,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 98 transitions, 458 flow [2022-12-11 22:04:30,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-11 22:04:30,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-11 22:04:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 272 transitions. [2022-12-11 22:04:30,217 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.85 [2022-12-11 22:04:30,218 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 7 predicate places. [2022-12-11 22:04:30,218 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 98 transitions, 458 flow [2022-12-11 22:04:30,222 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 94 transitions, 434 flow [2022-12-11 22:04:30,222 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 94 transitions, 434 flow [2022-12-11 22:04:30,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 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) [2022-12-11 22:04:30,224 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:04:30,224 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:04:30,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-11 22:04:30,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:04:30,429 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:04:30,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:04:30,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1035607300, now seen corresponding path program 3 times [2022-12-11 22:04:30,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:04:30,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279916809] [2022-12-11 22:04:30,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:04:30,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:04:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:04:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:30,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:04:30,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279916809] [2022-12-11 22:04:30,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279916809] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:04:30,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421122529] [2022-12-11 22:04:30,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-11 22:04:30,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:04:30,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:04:30,554 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) [2022-12-11 22:04:30,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-11 22:04:30,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-11 22:04:30,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 22:04:30,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-11 22:04:30,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:04:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:30,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:04:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:30,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421122529] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:04:30,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:04:30,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2022-12-11 22:04:30,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169324124] [2022-12-11 22:04:30,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:04:30,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-11 22:04:30,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:04:30,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-11 22:04:30,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-11 22:04:30,705 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 80 [2022-12-11 22:04:30,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 94 transitions, 434 flow. Second operand has 8 states, 8 states have (on average 60.75) internal successors, (486), 8 states have internal predecessors, (486), 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) [2022-12-11 22:04:30,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:04:30,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 80 [2022-12-11 22:04:30,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:04:30,866 INFO L130 PetriNetUnfolder]: 202/611 cut-off events. [2022-12-11 22:04:30,867 INFO L131 PetriNetUnfolder]: For 726/781 co-relation queries the response was YES. [2022-12-11 22:04:30,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1935 conditions, 611 events. 202/611 cut-off events. For 726/781 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3474 event pairs, 13 based on Foata normal form. 5/572 useless extension candidates. Maximal degree in co-relation 1467. Up to 251 conditions per place. [2022-12-11 22:04:30,872 INFO L137 encePairwiseOnDemand]: 72/80 looper letters, 97 selfloop transitions, 43 changer transitions 0/188 dead transitions. [2022-12-11 22:04:30,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 188 transitions, 1301 flow [2022-12-11 22:04:30,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-11 22:04:30,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-11 22:04:30,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 657 transitions. [2022-12-11 22:04:30,874 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.82125 [2022-12-11 22:04:30,875 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 16 predicate places. [2022-12-11 22:04:30,875 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 188 transitions, 1301 flow [2022-12-11 22:04:30,879 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 188 transitions, 1301 flow [2022-12-11 22:04:30,879 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 188 transitions, 1301 flow [2022-12-11 22:04:30,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 60.75) internal successors, (486), 8 states have internal predecessors, (486), 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) [2022-12-11 22:04:30,880 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:04:30,880 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:04:30,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-11 22:04:31,085 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,SelfDestructingSolverStorable3 [2022-12-11 22:04:31,086 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:04:31,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:04:31,087 INFO L85 PathProgramCache]: Analyzing trace with hash 282953902, now seen corresponding path program 4 times [2022-12-11 22:04:31,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:04:31,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095879561] [2022-12-11 22:04:31,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:04:31,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:04:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:04:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:31,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:04:31,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095879561] [2022-12-11 22:04:31,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095879561] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 22:04:31,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 22:04:31,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-11 22:04:31,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165209527] [2022-12-11 22:04:31,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 22:04:31,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-11 22:04:31,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:04:31,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-11 22:04:31,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-11 22:04:31,200 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 80 [2022-12-11 22:04:31,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 188 transitions, 1301 flow. Second operand has 6 states, 6 states have (on average 60.166666666666664) internal successors, (361), 6 states have internal predecessors, (361), 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) [2022-12-11 22:04:31,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:04:31,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 80 [2022-12-11 22:04:31,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:04:31,327 INFO L130 PetriNetUnfolder]: 199/581 cut-off events. [2022-12-11 22:04:31,327 INFO L131 PetriNetUnfolder]: For 1049/1128 co-relation queries the response was YES. [2022-12-11 22:04:31,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2281 conditions, 581 events. 199/581 cut-off events. For 1049/1128 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3211 event pairs, 9 based on Foata normal form. 9/552 useless extension candidates. Maximal degree in co-relation 1763. Up to 257 conditions per place. [2022-12-11 22:04:31,332 INFO L137 encePairwiseOnDemand]: 73/80 looper letters, 108 selfloop transitions, 27 changer transitions 0/183 dead transitions. [2022-12-11 22:04:31,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 183 transitions, 1534 flow [2022-12-11 22:04:31,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-11 22:04:31,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-11 22:04:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 393 transitions. [2022-12-11 22:04:31,334 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.81875 [2022-12-11 22:04:31,335 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 20 predicate places. [2022-12-11 22:04:31,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 183 transitions, 1534 flow [2022-12-11 22:04:31,339 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 183 transitions, 1534 flow [2022-12-11 22:04:31,339 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 183 transitions, 1534 flow [2022-12-11 22:04:31,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.166666666666664) internal successors, (361), 6 states have internal predecessors, (361), 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) [2022-12-11 22:04:31,340 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:04:31,340 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:04:31,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-11 22:04:31,340 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:04:31,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:04:31,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1135626576, now seen corresponding path program 1 times [2022-12-11 22:04:31,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:04:31,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104593869] [2022-12-11 22:04:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:04:31,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:04:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:04:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:31,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:04:31,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104593869] [2022-12-11 22:04:31,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104593869] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:04:31,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472352024] [2022-12-11 22:04:31,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:04:31,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:04:31,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:04:31,494 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) [2022-12-11 22:04:31,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-11 22:04:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:04:31,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-11 22:04:31,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:04:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-11 22:04:31,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:04:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-11 22:04:31,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472352024] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:04:31,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:04:31,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-12-11 22:04:31,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830868267] [2022-12-11 22:04:31,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:04:31,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-11 22:04:31,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:04:31,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-11 22:04:31,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-11 22:04:31,702 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-11 22:04:31,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 183 transitions, 1534 flow. Second operand has 9 states, 9 states have (on average 59.888888888888886) internal successors, (539), 9 states have internal predecessors, (539), 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) [2022-12-11 22:04:31,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:04:31,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-11 22:04:31,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:04:31,861 INFO L130 PetriNetUnfolder]: 359/1107 cut-off events. [2022-12-11 22:04:31,861 INFO L131 PetriNetUnfolder]: For 2855/3015 co-relation queries the response was YES. [2022-12-11 22:04:31,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4451 conditions, 1107 events. 359/1107 cut-off events. For 2855/3015 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7617 event pairs, 50 based on Foata normal form. 20/1043 useless extension candidates. Maximal degree in co-relation 3331. Up to 422 conditions per place. [2022-12-11 22:04:31,869 INFO L137 encePairwiseOnDemand]: 72/80 looper letters, 49 selfloop transitions, 14 changer transitions 18/217 dead transitions. [2022-12-11 22:04:31,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 217 transitions, 2099 flow [2022-12-11 22:04:31,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-11 22:04:31,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-11 22:04:31,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 427 transitions. [2022-12-11 22:04:31,871 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7625 [2022-12-11 22:04:31,871 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 26 predicate places. [2022-12-11 22:04:31,871 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 217 transitions, 2099 flow [2022-12-11 22:04:31,876 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 199 transitions, 1832 flow [2022-12-11 22:04:31,876 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 199 transitions, 1832 flow [2022-12-11 22:04:31,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 59.888888888888886) internal successors, (539), 9 states have internal predecessors, (539), 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) [2022-12-11 22:04:31,877 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:04:31,877 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:04:31,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-11 22:04:32,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:04:32,082 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:04:32,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:04:32,083 INFO L85 PathProgramCache]: Analyzing trace with hash -601285416, now seen corresponding path program 2 times [2022-12-11 22:04:32,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:04:32,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396342459] [2022-12-11 22:04:32,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:04:32,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:04:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:04:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:32,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:04:32,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396342459] [2022-12-11 22:04:32,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396342459] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:04:32,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125848852] [2022-12-11 22:04:32,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-11 22:04:32,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:04:32,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:04:32,277 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) [2022-12-11 22:04:32,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-11 22:04:32,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-11 22:04:32,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 22:04:32,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-11 22:04:32,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:04:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:32,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:04:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:32,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125848852] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:04:32,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:04:32,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-11 22:04:32,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482994599] [2022-12-11 22:04:32,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:04:32,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-11 22:04:32,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:04:32,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-11 22:04:32,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-12-11 22:04:32,616 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-11 22:04:32,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 199 transitions, 1832 flow. Second operand has 16 states, 16 states have (on average 58.625) internal successors, (938), 16 states have internal predecessors, (938), 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) [2022-12-11 22:04:32,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:04:32,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-11 22:04:32,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:04:33,818 INFO L130 PetriNetUnfolder]: 610/1624 cut-off events. [2022-12-11 22:04:33,819 INFO L131 PetriNetUnfolder]: For 4324/4532 co-relation queries the response was YES. [2022-12-11 22:04:33,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7859 conditions, 1624 events. 610/1624 cut-off events. For 4324/4532 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 11259 event pairs, 7 based on Foata normal form. 24/1525 useless extension candidates. Maximal degree in co-relation 7487. Up to 616 conditions per place. [2022-12-11 22:04:33,830 INFO L137 encePairwiseOnDemand]: 69/80 looper letters, 257 selfloop transitions, 243 changer transitions 21/573 dead transitions. [2022-12-11 22:04:33,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 573 transitions, 6794 flow [2022-12-11 22:04:33,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-11 22:04:33,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-12-11 22:04:33,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2843 transitions. [2022-12-11 22:04:33,835 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7561170212765957 [2022-12-11 22:04:33,835 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 70 predicate places. [2022-12-11 22:04:33,835 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 573 transitions, 6794 flow [2022-12-11 22:04:33,846 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 552 transitions, 6472 flow [2022-12-11 22:04:33,846 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 552 transitions, 6472 flow [2022-12-11 22:04:33,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 58.625) internal successors, (938), 16 states have internal predecessors, (938), 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) [2022-12-11 22:04:33,847 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:04:33,847 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:04:33,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-11 22:04:34,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:04:34,052 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:04:34,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:04:34,052 INFO L85 PathProgramCache]: Analyzing trace with hash 27301288, now seen corresponding path program 3 times [2022-12-11 22:04:34,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:04:34,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378862723] [2022-12-11 22:04:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:04:34,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:04:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:04:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:34,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:04:34,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378862723] [2022-12-11 22:04:34,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378862723] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:04:34,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058507546] [2022-12-11 22:04:34,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-11 22:04:34,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:04:34,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:04:34,225 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) [2022-12-11 22:04:34,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-11 22:04:34,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-11 22:04:34,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 22:04:34,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-11 22:04:34,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:04:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:34,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:04:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:34,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058507546] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:04:34,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:04:34,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-11 22:04:34,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777853579] [2022-12-11 22:04:34,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:04:34,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-11 22:04:34,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:04:34,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-11 22:04:34,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-12-11 22:04:34,452 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-11 22:04:34,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 552 transitions, 6472 flow. Second operand has 17 states, 17 states have (on average 58.35294117647059) internal successors, (992), 17 states have internal predecessors, (992), 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) [2022-12-11 22:04:34,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:04:34,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-11 22:04:34,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:04:34,972 INFO L130 PetriNetUnfolder]: 610/1603 cut-off events. [2022-12-11 22:04:34,972 INFO L131 PetriNetUnfolder]: For 5226/5402 co-relation queries the response was YES. [2022-12-11 22:04:34,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8957 conditions, 1603 events. 610/1603 cut-off events. For 5226/5402 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 10891 event pairs, 8 based on Foata normal form. 12/1512 useless extension candidates. Maximal degree in co-relation 7574. Up to 587 conditions per place. [2022-12-11 22:04:34,984 INFO L137 encePairwiseOnDemand]: 67/80 looper letters, 426 selfloop transitions, 156 changer transitions 6/640 dead transitions. [2022-12-11 22:04:34,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 640 transitions, 8651 flow [2022-12-11 22:04:34,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-11 22:04:34,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-11 22:04:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1217 transitions. [2022-12-11 22:04:34,986 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.760625 [2022-12-11 22:04:34,986 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 89 predicate places. [2022-12-11 22:04:34,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 640 transitions, 8651 flow [2022-12-11 22:04:34,998 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 634 transitions, 8571 flow [2022-12-11 22:04:34,998 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 634 transitions, 8571 flow [2022-12-11 22:04:34,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 58.35294117647059) internal successors, (992), 17 states have internal predecessors, (992), 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) [2022-12-11 22:04:34,999 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:04:34,999 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:04:35,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-11 22:04:35,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:04:35,204 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:04:35,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:04:35,204 INFO L85 PathProgramCache]: Analyzing trace with hash 384150968, now seen corresponding path program 4 times [2022-12-11 22:04:35,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:04:35,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264038375] [2022-12-11 22:04:35,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:04:35,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:04:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:04:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:35,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:04:35,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264038375] [2022-12-11 22:04:35,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264038375] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:04:35,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747832878] [2022-12-11 22:04:35,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-11 22:04:35,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:04:35,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:04:35,395 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) [2022-12-11 22:04:35,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-11 22:04:35,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-11 22:04:35,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 22:04:35,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-11 22:04:35,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:04:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:35,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:04:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:35,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747832878] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:04:35,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:04:35,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-11 22:04:35,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084870752] [2022-12-11 22:04:35,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:04:35,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-11 22:04:35,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:04:35,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-11 22:04:35,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-12-11 22:04:35,702 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-11 22:04:35,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 634 transitions, 8571 flow. Second operand has 19 states, 19 states have (on average 58.36842105263158) internal successors, (1109), 19 states have internal predecessors, (1109), 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) [2022-12-11 22:04:35,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:04:35,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-11 22:04:35,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:04:37,180 INFO L130 PetriNetUnfolder]: 767/2026 cut-off events. [2022-12-11 22:04:37,180 INFO L131 PetriNetUnfolder]: For 7860/8199 co-relation queries the response was YES. [2022-12-11 22:04:37,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12826 conditions, 2026 events. 767/2026 cut-off events. For 7860/8199 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14698 event pairs, 6 based on Foata normal form. 35/1921 useless extension candidates. Maximal degree in co-relation 10720. Up to 838 conditions per place. [2022-12-11 22:04:37,199 INFO L137 encePairwiseOnDemand]: 66/80 looper letters, 390 selfloop transitions, 402 changer transitions 5/849 dead transitions. [2022-12-11 22:04:37,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 849 transitions, 13106 flow [2022-12-11 22:04:37,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-11 22:04:37,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-12-11 22:04:37,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3915 transitions. [2022-12-11 22:04:37,206 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7528846153846154 [2022-12-11 22:04:37,206 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 150 predicate places. [2022-12-11 22:04:37,206 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 849 transitions, 13106 flow [2022-12-11 22:04:37,227 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 844 transitions, 13020 flow [2022-12-11 22:04:37,228 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 844 transitions, 13020 flow [2022-12-11 22:04:37,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.36842105263158) internal successors, (1109), 19 states have internal predecessors, (1109), 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) [2022-12-11 22:04:37,228 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:04:37,229 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:04:37,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-11 22:04:37,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:04:37,449 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:04:37,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:04:37,450 INFO L85 PathProgramCache]: Analyzing trace with hash 360924904, now seen corresponding path program 5 times [2022-12-11 22:04:37,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:04:37,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524013836] [2022-12-11 22:04:37,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:04:37,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:04:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:04:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:37,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:04:37,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524013836] [2022-12-11 22:04:37,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524013836] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:04:37,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97761616] [2022-12-11 22:04:37,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-11 22:04:37,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:04:37,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:04:37,631 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) [2022-12-11 22:04:37,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-11 22:04:37,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-11 22:04:37,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 22:04:37,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-11 22:04:37,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:04:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:37,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:04:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:37,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97761616] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:04:37,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:04:37,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-11 22:04:37,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388070357] [2022-12-11 22:04:37,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:04:37,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-11 22:04:37,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:04:37,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-11 22:04:37,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-12-11 22:04:37,943 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-11 22:04:37,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 844 transitions, 13020 flow. Second operand has 18 states, 18 states have (on average 58.72222222222222) internal successors, (1057), 18 states have internal predecessors, (1057), 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) [2022-12-11 22:04:37,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:04:37,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-11 22:04:37,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:04:39,891 INFO L130 PetriNetUnfolder]: 1077/2860 cut-off events. [2022-12-11 22:04:39,892 INFO L131 PetriNetUnfolder]: For 14046/14527 co-relation queries the response was YES. [2022-12-11 22:04:39,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20424 conditions, 2860 events. 1077/2860 cut-off events. For 14046/14527 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 22869 event pairs, 12 based on Foata normal form. 44/2722 useless extension candidates. Maximal degree in co-relation 16581. Up to 1268 conditions per place. [2022-12-11 22:04:39,917 INFO L137 encePairwiseOnDemand]: 68/80 looper letters, 556 selfloop transitions, 602 changer transitions 6/1216 dead transitions. [2022-12-11 22:04:39,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 1216 transitions, 21366 flow [2022-12-11 22:04:39,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-11 22:04:39,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-12-11 22:04:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3737 transitions. [2022-12-11 22:04:39,921 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7534274193548387 [2022-12-11 22:04:39,922 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 210 predicate places. [2022-12-11 22:04:39,922 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 1216 transitions, 21366 flow [2022-12-11 22:04:39,945 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 281 places, 1210 transitions, 21216 flow [2022-12-11 22:04:39,945 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 1210 transitions, 21216 flow [2022-12-11 22:04:39,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.72222222222222) internal successors, (1057), 18 states have internal predecessors, (1057), 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) [2022-12-11 22:04:39,945 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:04:39,946 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:04:39,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-11 22:04:40,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:04:40,151 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:04:40,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:04:40,152 INFO L85 PathProgramCache]: Analyzing trace with hash -686193052, now seen corresponding path program 6 times [2022-12-11 22:04:40,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:04:40,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815377343] [2022-12-11 22:04:40,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:04:40,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:04:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:04:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:40,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:04:40,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815377343] [2022-12-11 22:04:40,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815377343] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:04:40,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760598941] [2022-12-11 22:04:40,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-11 22:04:40,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:04:40,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:04:40,330 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) [2022-12-11 22:04:40,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-11 22:04:40,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-11 22:04:40,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 22:04:40,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-11 22:04:40,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:04:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:40,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:04:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:40,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760598941] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:04:40,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:04:40,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-11 22:04:40,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825265757] [2022-12-11 22:04:40,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:04:40,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-11 22:04:40,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:04:40,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-11 22:04:40,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-12-11 22:04:40,592 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-11 22:04:40,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 1210 transitions, 21216 flow. Second operand has 19 states, 19 states have (on average 58.63157894736842) internal successors, (1114), 19 states have internal predecessors, (1114), 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) [2022-12-11 22:04:40,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:04:40,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-11 22:04:40,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:04:43,024 INFO L130 PetriNetUnfolder]: 1511/4119 cut-off events. [2022-12-11 22:04:43,024 INFO L131 PetriNetUnfolder]: For 26111/27067 co-relation queries the response was YES. [2022-12-11 22:04:43,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32398 conditions, 4119 events. 1511/4119 cut-off events. For 26111/27067 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 36307 event pairs, 18 based on Foata normal form. 74/3950 useless extension candidates. Maximal degree in co-relation 27291. Up to 2040 conditions per place. [2022-12-11 22:04:43,053 INFO L137 encePairwiseOnDemand]: 68/80 looper letters, 753 selfloop transitions, 988 changer transitions 5/1798 dead transitions. [2022-12-11 22:04:43,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 1798 transitions, 35270 flow [2022-12-11 22:04:43,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-12-11 22:04:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-12-11 22:04:43,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 4710 transitions. [2022-12-11 22:04:43,065 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.745253164556962 [2022-12-11 22:04:43,065 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 288 predicate places. [2022-12-11 22:04:43,065 INFO L82 GeneralOperation]: Start removeDead. Operand has 359 places, 1798 transitions, 35270 flow [2022-12-11 22:04:43,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 359 places, 1793 transitions, 35135 flow [2022-12-11 22:04:43,096 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 1793 transitions, 35135 flow [2022-12-11 22:04:43,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.63157894736842) internal successors, (1114), 19 states have internal predecessors, (1114), 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) [2022-12-11 22:04:43,098 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:04:43,098 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:04:43,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-11 22:04:43,304 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,SelfDestructingSolverStorable10 [2022-12-11 22:04:43,305 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:04:43,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:04:43,305 INFO L85 PathProgramCache]: Analyzing trace with hash -157150628, now seen corresponding path program 7 times [2022-12-11 22:04:43,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:04:43,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645152078] [2022-12-11 22:04:43,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:04:43,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:04:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:04:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:43,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:04:43,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645152078] [2022-12-11 22:04:43,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645152078] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:04:43,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23477365] [2022-12-11 22:04:43,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-11 22:04:43,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:04:43,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:04:43,466 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) [2022-12-11 22:04:43,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-11 22:04:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:04:43,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-11 22:04:43,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:04:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:43,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:04:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:43,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23477365] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:04:43,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:04:43,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-12-11 22:04:43,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229451619] [2022-12-11 22:04:43,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:04:43,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-11 22:04:43,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:04:43,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-11 22:04:43,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-12-11 22:04:43,696 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-11 22:04:43,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 1793 transitions, 35135 flow. Second operand has 20 states, 20 states have (on average 58.3) internal successors, (1166), 20 states have internal predecessors, (1166), 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) [2022-12-11 22:04:43,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:04:43,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-11 22:04:43,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:04:47,419 INFO L130 PetriNetUnfolder]: 2161/5931 cut-off events. [2022-12-11 22:04:47,420 INFO L131 PetriNetUnfolder]: For 46317/47895 co-relation queries the response was YES. [2022-12-11 22:04:47,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50885 conditions, 5931 events. 2161/5931 cut-off events. For 46317/47895 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 56676 event pairs, 18 based on Foata normal form. 195/5785 useless extension candidates. Maximal degree in co-relation 43731. Up to 3138 conditions per place. [2022-12-11 22:04:47,465 INFO L137 encePairwiseOnDemand]: 68/80 looper letters, 1053 selfloop transitions, 1452 changer transitions 13/2570 dead transitions. [2022-12-11 22:04:47,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 2570 transitions, 55763 flow [2022-12-11 22:04:47,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-12-11 22:04:47,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2022-12-11 22:04:47,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 6465 transitions. [2022-12-11 22:04:47,471 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7482638888888888 [2022-12-11 22:04:47,471 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 395 predicate places. [2022-12-11 22:04:47,471 INFO L82 GeneralOperation]: Start removeDead. Operand has 466 places, 2570 transitions, 55763 flow [2022-12-11 22:04:47,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 466 places, 2557 transitions, 55472 flow [2022-12-11 22:04:47,531 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 2557 transitions, 55472 flow [2022-12-11 22:04:47,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 58.3) internal successors, (1166), 20 states have internal predecessors, (1166), 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) [2022-12-11 22:04:47,532 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:04:47,532 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:04:47,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-11 22:04:47,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:04:47,738 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:04:47,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:04:47,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2120935728, now seen corresponding path program 8 times [2022-12-11 22:04:47,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:04:47,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55690014] [2022-12-11 22:04:47,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:04:47,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:04:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:04:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:47,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:04:47,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55690014] [2022-12-11 22:04:47,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55690014] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:04:47,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893929573] [2022-12-11 22:04:47,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-11 22:04:47,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:04:47,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:04:47,886 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) [2022-12-11 22:04:47,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-11 22:04:47,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-11 22:04:47,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 22:04:47,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-11 22:04:47,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:04:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:48,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:04:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:48,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893929573] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:04:48,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:04:48,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-11 22:04:48,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468742696] [2022-12-11 22:04:48,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:04:48,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-11 22:04:48,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:04:48,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-11 22:04:48,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-12-11 22:04:48,255 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-11 22:04:48,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 2557 transitions, 55472 flow. Second operand has 18 states, 18 states have (on average 58.27777777777778) internal successors, (1049), 18 states have internal predecessors, (1049), 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) [2022-12-11 22:04:48,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:04:48,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-11 22:04:48,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:04:53,438 INFO L130 PetriNetUnfolder]: 3578/9823 cut-off events. [2022-12-11 22:04:53,438 INFO L131 PetriNetUnfolder]: For 85924/88096 co-relation queries the response was YES. [2022-12-11 22:04:53,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89248 conditions, 9823 events. 3578/9823 cut-off events. For 85924/88096 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 102225 event pairs, 32 based on Foata normal form. 88/9309 useless extension candidates. Maximal degree in co-relation 88324. Up to 5286 conditions per place. [2022-12-11 22:04:53,524 INFO L137 encePairwiseOnDemand]: 66/80 looper letters, 2131 selfloop transitions, 2069 changer transitions 3/4255 dead transitions. [2022-12-11 22:04:53,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 4255 transitions, 99483 flow [2022-12-11 22:04:53,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-12-11 22:04:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2022-12-11 22:04:53,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 5609 transitions. [2022-12-11 22:04:53,530 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.745877659574468 [2022-12-11 22:04:53,530 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 488 predicate places. [2022-12-11 22:04:53,530 INFO L82 GeneralOperation]: Start removeDead. Operand has 559 places, 4255 transitions, 99483 flow [2022-12-11 22:04:53,617 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 558 places, 4252 transitions, 99419 flow [2022-12-11 22:04:53,618 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 4252 transitions, 99419 flow [2022-12-11 22:04:53,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.27777777777778) internal successors, (1049), 18 states have internal predecessors, (1049), 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) [2022-12-11 22:04:53,618 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:04:53,630 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:04:53,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-11 22:04:53,831 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,SelfDestructingSolverStorable12 [2022-12-11 22:04:53,831 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:04:53,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:04:53,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1182012400, now seen corresponding path program 9 times [2022-12-11 22:04:53,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:04:53,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835149300] [2022-12-11 22:04:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:04:53,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:04:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:04:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:53,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:04:53,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835149300] [2022-12-11 22:04:53,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835149300] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:04:53,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520060106] [2022-12-11 22:04:53,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-11 22:04:53,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:04:53,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:04:54,005 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) [2022-12-11 22:04:54,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-11 22:04:54,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-11 22:04:54,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 22:04:54,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-11 22:04:54,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:04:54,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:54,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:04:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:04:54,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520060106] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:04:54,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:04:54,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-11 22:04:54,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504036681] [2022-12-11 22:04:54,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:04:54,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-11 22:04:54,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:04:54,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-11 22:04:54,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-12-11 22:04:54,315 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-11 22:04:54,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 4252 transitions, 99419 flow. Second operand has 17 states, 17 states have (on average 58.35294117647059) internal successors, (992), 17 states have internal predecessors, (992), 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) [2022-12-11 22:04:54,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:04:54,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-11 22:04:54,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:04:59,699 INFO L130 PetriNetUnfolder]: 3689/10054 cut-off events. [2022-12-11 22:04:59,699 INFO L131 PetriNetUnfolder]: For 99295/101829 co-relation queries the response was YES. [2022-12-11 22:04:59,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99261 conditions, 10054 events. 3689/10054 cut-off events. For 99295/101829 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 104284 event pairs, 32 based on Foata normal form. 42/9492 useless extension candidates. Maximal degree in co-relation 98290. Up to 5350 conditions per place. [2022-12-11 22:04:59,774 INFO L137 encePairwiseOnDemand]: 67/80 looper letters, 2916 selfloop transitions, 1453 changer transitions 3/4424 dead transitions. [2022-12-11 22:04:59,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 4424 transitions, 112016 flow [2022-12-11 22:04:59,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-11 22:04:59,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-11 22:04:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2057 transitions. [2022-12-11 22:04:59,776 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.75625 [2022-12-11 22:04:59,777 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 520 predicate places. [2022-12-11 22:04:59,777 INFO L82 GeneralOperation]: Start removeDead. Operand has 591 places, 4424 transitions, 112016 flow [2022-12-11 22:04:59,865 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 588 places, 4421 transitions, 111948 flow [2022-12-11 22:04:59,866 INFO L495 AbstractCegarLoop]: Abstraction has has 588 places, 4421 transitions, 111948 flow [2022-12-11 22:04:59,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 58.35294117647059) internal successors, (992), 17 states have internal predecessors, (992), 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) [2022-12-11 22:04:59,866 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:04:59,866 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:04:59,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-11 22:05:00,071 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,SelfDestructingSolverStorable13 [2022-12-11 22:05:00,071 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:05:00,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:05:00,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1934933936, now seen corresponding path program 10 times [2022-12-11 22:05:00,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:05:00,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377266161] [2022-12-11 22:05:00,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:05:00,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:05:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:05:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:05:00,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:05:00,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377266161] [2022-12-11 22:05:00,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377266161] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:05:00,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889619732] [2022-12-11 22:05:00,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-11 22:05:00,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:05:00,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:05:00,202 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) [2022-12-11 22:05:00,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-11 22:05:00,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-11 22:05:00,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 22:05:00,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-11 22:05:00,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:05:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:05:00,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:05:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:05:00,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889619732] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:05:00,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:05:00,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-11 22:05:00,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962620486] [2022-12-11 22:05:00,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:05:00,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-11 22:05:00,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:05:00,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-11 22:05:00,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-12-11 22:05:00,383 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-11 22:05:00,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 4421 transitions, 111948 flow. Second operand has 18 states, 18 states have (on average 58.27777777777778) internal successors, (1049), 18 states have internal predecessors, (1049), 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) [2022-12-11 22:05:00,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:05:00,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-11 22:05:00,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:05:07,765 INFO L130 PetriNetUnfolder]: 4615/12624 cut-off events. [2022-12-11 22:05:07,767 INFO L131 PetriNetUnfolder]: For 140326/144224 co-relation queries the response was YES. [2022-12-11 22:05:07,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133833 conditions, 12624 events. 4615/12624 cut-off events. For 140326/144224 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 137141 event pairs, 45 based on Foata normal form. 129/11965 useless extension candidates. Maximal degree in co-relation 123590. Up to 6968 conditions per place. [2022-12-11 22:05:07,879 INFO L137 encePairwiseOnDemand]: 66/80 looper letters, 3021 selfloop transitions, 2248 changer transitions 5/5326 dead transitions. [2022-12-11 22:05:07,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 644 places, 5326 transitions, 146086 flow [2022-12-11 22:05:07,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-11 22:05:07,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-12-11 22:05:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3465 transitions. [2022-12-11 22:05:07,890 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7598684210526315 [2022-12-11 22:05:07,890 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 573 predicate places. [2022-12-11 22:05:07,890 INFO L82 GeneralOperation]: Start removeDead. Operand has 644 places, 5326 transitions, 146086 flow [2022-12-11 22:05:08,038 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 642 places, 5321 transitions, 145962 flow [2022-12-11 22:05:08,039 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 5321 transitions, 145962 flow [2022-12-11 22:05:08,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.27777777777778) internal successors, (1049), 18 states have internal predecessors, (1049), 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) [2022-12-11 22:05:08,039 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:05:08,039 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:05:08,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-11 22:05:08,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-11 22:05:08,240 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:05:08,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:05:08,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1178619880, now seen corresponding path program 11 times [2022-12-11 22:05:08,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:05:08,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099498418] [2022-12-11 22:05:08,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:05:08,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:05:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:05:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:05:08,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:05:08,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099498418] [2022-12-11 22:05:08,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099498418] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:05:08,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897036871] [2022-12-11 22:05:08,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-11 22:05:08,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:05:08,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:05:08,445 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 22:05:08,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-11 22:05:08,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-11 22:05:08,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 22:05:08,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-11 22:05:08,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:05:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:05:08,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:05:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:05:08,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897036871] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:05:08,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:05:08,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-11 22:05:08,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497481760] [2022-12-11 22:05:08,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:05:08,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-11 22:05:08,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:05:08,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-11 22:05:08,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-12-11 22:05:08,703 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-11 22:05:08,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 5321 transitions, 145962 flow. Second operand has 18 states, 18 states have (on average 58.72222222222222) internal successors, (1057), 18 states have internal predecessors, (1057), 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) [2022-12-11 22:05:08,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:05:08,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-11 22:05:08,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:05:20,750 INFO L130 PetriNetUnfolder]: 5794/15871 cut-off events. [2022-12-11 22:05:20,751 INFO L131 PetriNetUnfolder]: For 204807/210340 co-relation queries the response was YES. [2022-12-11 22:05:20,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179597 conditions, 15871 events. 5794/15871 cut-off events. For 204807/210340 co-relation queries the response was YES. Maximal size of possible extension queue 971. Compared 179958 event pairs, 52 based on Foata normal form. 199/15121 useless extension candidates. Maximal degree in co-relation 168671. Up to 8582 conditions per place. [2022-12-11 22:05:20,881 INFO L137 encePairwiseOnDemand]: 68/80 looper letters, 2999 selfloop transitions, 3747 changer transitions 19/6817 dead transitions. [2022-12-11 22:05:20,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 716 places, 6817 transitions, 200704 flow [2022-12-11 22:05:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-12-11 22:05:20,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-12-11 22:05:20,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 4503 transitions. [2022-12-11 22:05:20,911 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7505 [2022-12-11 22:05:20,912 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 645 predicate places. [2022-12-11 22:05:20,912 INFO L82 GeneralOperation]: Start removeDead. Operand has 716 places, 6817 transitions, 200704 flow [2022-12-11 22:05:21,074 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 716 places, 6798 transitions, 200001 flow [2022-12-11 22:05:21,074 INFO L495 AbstractCegarLoop]: Abstraction has has 716 places, 6798 transitions, 200001 flow [2022-12-11 22:05:21,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.72222222222222) internal successors, (1057), 18 states have internal predecessors, (1057), 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) [2022-12-11 22:05:21,075 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:05:21,075 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:05:21,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-11 22:05:21,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-11 22:05:21,280 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:05:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:05:21,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1813507532, now seen corresponding path program 12 times [2022-12-11 22:05:21,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:05:21,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467332238] [2022-12-11 22:05:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:05:21,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:05:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:05:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:05:21,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:05:21,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467332238] [2022-12-11 22:05:21,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467332238] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:05:21,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792594706] [2022-12-11 22:05:21,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-11 22:05:21,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:05:21,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:05:21,446 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 22:05:21,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-11 22:05:21,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-11 22:05:21,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 22:05:21,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-11 22:05:21,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:05:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:05:21,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:05:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:05:21,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792594706] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:05:21,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:05:21,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-11 22:05:21,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090454340] [2022-12-11 22:05:21,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:05:21,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-11 22:05:21,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:05:21,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-11 22:05:21,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-12-11 22:05:21,708 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-11 22:05:21,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 716 places, 6798 transitions, 200001 flow. Second operand has 19 states, 19 states have (on average 58.73684210526316) internal successors, (1116), 19 states have internal predecessors, (1116), 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) [2022-12-11 22:05:21,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:05:21,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-11 22:05:21,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:05:39,826 INFO L130 PetriNetUnfolder]: 6845/18575 cut-off events. [2022-12-11 22:05:39,827 INFO L131 PetriNetUnfolder]: For 267909/274775 co-relation queries the response was YES. [2022-12-11 22:05:39,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225659 conditions, 18575 events. 6845/18575 cut-off events. For 267909/274775 co-relation queries the response was YES. Maximal size of possible extension queue 1177. Compared 215057 event pairs, 55 based on Foata normal form. 555/18022 useless extension candidates. Maximal degree in co-relation 217909. Up to 10317 conditions per place. [2022-12-11 22:05:39,985 INFO L137 encePairwiseOnDemand]: 68/80 looper letters, 3373 selfloop transitions, 4825 changer transitions 24/8274 dead transitions. [2022-12-11 22:05:39,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 848 places, 8274 transitions, 259673 flow [2022-12-11 22:05:39,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-12-11 22:05:39,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2022-12-11 22:05:39,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 7898 transitions. [2022-12-11 22:05:39,989 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7422932330827068 [2022-12-11 22:05:39,990 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 777 predicate places. [2022-12-11 22:05:39,990 INFO L82 GeneralOperation]: Start removeDead. Operand has 848 places, 8274 transitions, 259673 flow [2022-12-11 22:05:40,196 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 848 places, 8250 transitions, 258821 flow [2022-12-11 22:05:40,196 INFO L495 AbstractCegarLoop]: Abstraction has has 848 places, 8250 transitions, 258821 flow [2022-12-11 22:05:40,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.73684210526316) internal successors, (1116), 19 states have internal predecessors, (1116), 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) [2022-12-11 22:05:40,197 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:05:40,197 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:05:40,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-11 22:05:40,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:05:40,402 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:05:40,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:05:40,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1370033182, now seen corresponding path program 13 times [2022-12-11 22:05:40,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:05:40,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111114550] [2022-12-11 22:05:40,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:05:40,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:05:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:05:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:05:40,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:05:40,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111114550] [2022-12-11 22:05:40,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111114550] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:05:40,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829275422] [2022-12-11 22:05:40,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-11 22:05:40,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:05:40,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:05:40,701 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 22:05:40,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-11 22:05:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:05:40,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-11 22:05:40,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:05:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:05:40,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:05:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:05:40,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829275422] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:05:40,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:05:40,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-11 22:05:40,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072825334] [2022-12-11 22:05:40,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:05:40,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-11 22:05:40,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:05:40,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-11 22:05:40,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-12-11 22:05:40,901 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-11 22:05:40,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 848 places, 8250 transitions, 258821 flow. Second operand has 19 states, 19 states have (on average 58.26315789473684) internal successors, (1107), 19 states have internal predecessors, (1107), 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) [2022-12-11 22:05:40,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:05:40,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-11 22:05:40,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:06:01,694 INFO L130 PetriNetUnfolder]: 7162/19515 cut-off events. [2022-12-11 22:06:01,695 INFO L131 PetriNetUnfolder]: For 308730/314707 co-relation queries the response was YES. [2022-12-11 22:06:01,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251477 conditions, 19515 events. 7162/19515 cut-off events. For 308730/314707 co-relation queries the response was YES. Maximal size of possible extension queue 1255. Compared 227812 event pairs, 69 based on Foata normal form. 280/18657 useless extension candidates. Maximal degree in co-relation 243089. Up to 10879 conditions per place. [2022-12-11 22:06:01,875 INFO L137 encePairwiseOnDemand]: 68/80 looper letters, 3877 selfloop transitions, 4650 changer transitions 5/8584 dead transitions. [2022-12-11 22:06:01,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 922 places, 8584 transitions, 286722 flow [2022-12-11 22:06:01,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-12-11 22:06:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-12-11 22:06:01,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 5001 transitions. [2022-12-11 22:06:01,879 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7531626506024096 [2022-12-11 22:06:01,879 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 851 predicate places. [2022-12-11 22:06:01,879 INFO L82 GeneralOperation]: Start removeDead. Operand has 922 places, 8584 transitions, 286722 flow [2022-12-11 22:06:02,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 922 places, 8579 transitions, 286545 flow [2022-12-11 22:06:02,111 INFO L495 AbstractCegarLoop]: Abstraction has has 922 places, 8579 transitions, 286545 flow [2022-12-11 22:06:02,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.26315789473684) internal successors, (1107), 19 states have internal predecessors, (1107), 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) [2022-12-11 22:06:02,112 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:06:02,112 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:06:02,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-11 22:06:02,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-11 22:06:02,316 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:06:02,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:06:02,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1295209284, now seen corresponding path program 14 times [2022-12-11 22:06:02,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:06:02,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634761535] [2022-12-11 22:06:02,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:06:02,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:06:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:06:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:06:02,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:06:02,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634761535] [2022-12-11 22:06:02,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634761535] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:06:02,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799763268] [2022-12-11 22:06:02,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-11 22:06:02,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:06:02,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:06:02,432 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 22:06:02,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-11 22:06:02,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-11 22:06:02,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 22:06:02,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-11 22:06:02,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:06:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:06:02,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:06:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:06:02,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799763268] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:06:02,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:06:02,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-11 22:06:02,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290860989] [2022-12-11 22:06:02,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:06:02,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-11 22:06:02,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:06:02,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-11 22:06:02,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-12-11 22:06:02,647 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-11 22:06:02,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 922 places, 8579 transitions, 286545 flow. Second operand has 19 states, 19 states have (on average 58.26315789473684) internal successors, (1107), 19 states have internal predecessors, (1107), 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) [2022-12-11 22:06:02,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:06:02,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-11 22:06:02,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:06:36,398 INFO L130 PetriNetUnfolder]: 7445/20379 cut-off events. [2022-12-11 22:06:36,399 INFO L131 PetriNetUnfolder]: For 356689/363995 co-relation queries the response was YES. [2022-12-11 22:06:36,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279367 conditions, 20379 events. 7445/20379 cut-off events. For 356689/363995 co-relation queries the response was YES. Maximal size of possible extension queue 1358. Compared 241162 event pairs, 73 based on Foata normal form. 312/19520 useless extension candidates. Maximal degree in co-relation 270464. Up to 11491 conditions per place. [2022-12-11 22:06:36,628 INFO L137 encePairwiseOnDemand]: 68/80 looper letters, 3853 selfloop transitions, 5083 changer transitions 4/8992 dead transitions. [2022-12-11 22:06:36,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1051 places, 8992 transitions, 318878 flow [2022-12-11 22:06:36,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-12-11 22:06:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2022-12-11 22:06:36,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 7752 transitions. [2022-12-11 22:06:36,635 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7453846153846154 [2022-12-11 22:06:36,636 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 980 predicate places. [2022-12-11 22:06:36,636 INFO L82 GeneralOperation]: Start removeDead. Operand has 1051 places, 8992 transitions, 318878 flow [2022-12-11 22:06:37,090 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1051 places, 8988 transitions, 318706 flow [2022-12-11 22:06:37,090 INFO L495 AbstractCegarLoop]: Abstraction has has 1051 places, 8988 transitions, 318706 flow [2022-12-11 22:06:37,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.26315789473684) internal successors, (1107), 19 states have internal predecessors, (1107), 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) [2022-12-11 22:06:37,091 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:06:37,091 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:06:37,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-11 22:06:37,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:06:37,296 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:06:37,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:06:37,296 INFO L85 PathProgramCache]: Analyzing trace with hash 533520028, now seen corresponding path program 15 times [2022-12-11 22:06:37,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:06:37,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045977919] [2022-12-11 22:06:37,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:06:37,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:06:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:06:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:06:37,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:06:37,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045977919] [2022-12-11 22:06:37,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045977919] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:06:37,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069429445] [2022-12-11 22:06:37,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-11 22:06:37,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:06:37,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:06:37,416 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 22:06:37,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-11 22:06:37,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-11 22:06:37,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 22:06:37,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-11 22:06:37,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:06:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:06:37,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:06:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:06:37,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069429445] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:06:37,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:06:37,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-11 22:06:37,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262066492] [2022-12-11 22:06:37,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:06:37,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-11 22:06:37,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:06:37,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-11 22:06:37,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-12-11 22:06:37,663 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-11 22:06:37,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1051 places, 8988 transitions, 318706 flow. Second operand has 18 states, 18 states have (on average 58.72222222222222) internal successors, (1057), 18 states have internal predecessors, (1057), 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) [2022-12-11 22:06:37,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:06:37,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-11 22:06:37,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:07:20,408 INFO L130 PetriNetUnfolder]: 8093/22068 cut-off events. [2022-12-11 22:07:20,408 INFO L131 PetriNetUnfolder]: For 419421/427681 co-relation queries the response was YES. [2022-12-11 22:07:20,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318719 conditions, 22068 events. 8093/22068 cut-off events. For 419421/427681 co-relation queries the response was YES. Maximal size of possible extension queue 1445. Compared 263304 event pairs, 84 based on Foata normal form. 297/21098 useless extension candidates. Maximal degree in co-relation 309362. Up to 12347 conditions per place. [2022-12-11 22:07:20,628 INFO L137 encePairwiseOnDemand]: 69/80 looper letters, 4547 selfloop transitions, 5198 changer transitions 10/9807 dead transitions. [2022-12-11 22:07:20,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1136 places, 9807 transitions, 366484 flow [2022-12-11 22:07:20,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-12-11 22:07:20,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-12-11 22:07:20,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 5111 transitions. [2022-12-11 22:07:20,631 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7428779069767442 [2022-12-11 22:07:20,631 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 1065 predicate places. [2022-12-11 22:07:20,631 INFO L82 GeneralOperation]: Start removeDead. Operand has 1136 places, 9807 transitions, 366484 flow [2022-12-11 22:07:20,926 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1136 places, 9797 transitions, 366048 flow [2022-12-11 22:07:20,927 INFO L495 AbstractCegarLoop]: Abstraction has has 1136 places, 9797 transitions, 366048 flow [2022-12-11 22:07:20,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.72222222222222) internal successors, (1057), 18 states have internal predecessors, (1057), 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) [2022-12-11 22:07:20,927 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:07:20,927 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:07:20,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-11 22:07:21,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:07:21,133 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:07:21,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:07:21,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1491938472, now seen corresponding path program 16 times [2022-12-11 22:07:21,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:07:21,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96543510] [2022-12-11 22:07:21,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:07:21,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:07:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:07:21,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:07:21,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:07:21,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96543510] [2022-12-11 22:07:21,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96543510] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:07:21,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950778396] [2022-12-11 22:07:21,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-11 22:07:21,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:07:21,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:07:21,251 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 22:07:21,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-11 22:07:21,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-11 22:07:21,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 22:07:21,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-11 22:07:21,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:07:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:07:21,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:07:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:07:21,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950778396] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:07:21,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:07:21,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-11 22:07:21,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12113452] [2022-12-11 22:07:21,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:07:21,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-11 22:07:21,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:07:21,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-11 22:07:21,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-12-11 22:07:21,464 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-11 22:07:21,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1136 places, 9797 transitions, 366048 flow. Second operand has 18 states, 18 states have (on average 58.27777777777778) internal successors, (1049), 18 states have internal predecessors, (1049), 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) [2022-12-11 22:07:21,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:07:21,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-11 22:07:21,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:08:04,656 INFO L130 PetriNetUnfolder]: 9159/25090 cut-off events. [2022-12-11 22:08:04,657 INFO L131 PetriNetUnfolder]: For 518312/528246 co-relation queries the response was YES. [2022-12-11 22:08:04,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378535 conditions, 25090 events. 9159/25090 cut-off events. For 518312/528246 co-relation queries the response was YES. Maximal size of possible extension queue 1600. Compared 306536 event pairs, 101 based on Foata normal form. 286/23886 useless extension candidates. Maximal degree in co-relation 305632. Up to 13940 conditions per place. [2022-12-11 22:08:04,938 INFO L137 encePairwiseOnDemand]: 66/80 looper letters, 7763 selfloop transitions, 3323 changer transitions 5/11143 dead transitions. [2022-12-11 22:08:04,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1192 places, 11143 transitions, 437853 flow [2022-12-11 22:08:04,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-11 22:08:04,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-12-11 22:08:04,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3423 transitions. [2022-12-11 22:08:04,941 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7506578947368421 [2022-12-11 22:08:04,941 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 1121 predicate places. [2022-12-11 22:08:04,941 INFO L82 GeneralOperation]: Start removeDead. Operand has 1192 places, 11143 transitions, 437853 flow [2022-12-11 22:08:05,303 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1192 places, 11138 transitions, 437647 flow [2022-12-11 22:08:05,304 INFO L495 AbstractCegarLoop]: Abstraction has has 1192 places, 11138 transitions, 437647 flow [2022-12-11 22:08:05,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.27777777777778) internal successors, (1049), 18 states have internal predecessors, (1049), 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) [2022-12-11 22:08:05,304 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:08:05,304 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:08:05,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-11 22:08:05,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:08:05,512 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:08:05,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:08:05,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1392354844, now seen corresponding path program 17 times [2022-12-11 22:08:05,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:08:05,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894249329] [2022-12-11 22:08:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:08:05,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:08:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:08:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:08:05,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:08:05,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894249329] [2022-12-11 22:08:05,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894249329] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:08:05,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035951520] [2022-12-11 22:08:05,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-11 22:08:05,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:08:05,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:08:05,658 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 22:08:05,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-11 22:08:05,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-11 22:08:05,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 22:08:05,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-11 22:08:05,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:08:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:08:05,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:08:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:08:06,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035951520] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:08:06,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:08:06,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2022-12-11 22:08:06,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421608079] [2022-12-11 22:08:06,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:08:06,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-11 22:08:06,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:08:06,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-11 22:08:06,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-12-11 22:08:06,025 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-11 22:08:06,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1192 places, 11138 transitions, 437647 flow. Second operand has 23 states, 23 states have (on average 58.0) internal successors, (1334), 23 states have internal predecessors, (1334), 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) [2022-12-11 22:08:06,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:08:06,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-11 22:08:06,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:09:23,944 INFO L130 PetriNetUnfolder]: 13170/36412 cut-off events. [2022-12-11 22:09:23,944 INFO L131 PetriNetUnfolder]: For 904908/922930 co-relation queries the response was YES. [2022-12-11 22:09:24,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573653 conditions, 36412 events. 13170/36412 cut-off events. For 904908/922930 co-relation queries the response was YES. Maximal size of possible extension queue 2269. Compared 470940 event pairs, 115 based on Foata normal form. 344/34528 useless extension candidates. Maximal degree in co-relation 570863. Up to 20802 conditions per place. [2022-12-11 22:09:24,509 INFO L137 encePairwiseOnDemand]: 66/80 looper letters, 9108 selfloop transitions, 6603 changer transitions 30/15793 dead transitions. [2022-12-11 22:09:24,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1266 places, 15793 transitions, 657734 flow [2022-12-11 22:09:24,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-12-11 22:09:24,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-12-11 22:09:24,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 4503 transitions. [2022-12-11 22:09:24,512 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7505 [2022-12-11 22:09:24,512 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 1195 predicate places. [2022-12-11 22:09:24,513 INFO L82 GeneralOperation]: Start removeDead. Operand has 1266 places, 15793 transitions, 657734 flow [2022-12-11 22:09:25,042 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1262 places, 15763 transitions, 656389 flow [2022-12-11 22:09:25,042 INFO L495 AbstractCegarLoop]: Abstraction has has 1262 places, 15763 transitions, 656389 flow [2022-12-11 22:09:25,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 58.0) internal successors, (1334), 23 states have internal predecessors, (1334), 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) [2022-12-11 22:09:25,043 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:09:25,044 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:09:25,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-11 22:09:25,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:09:25,248 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:09:25,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:09:25,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1004413856, now seen corresponding path program 18 times [2022-12-11 22:09:25,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:09:25,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514443872] [2022-12-11 22:09:25,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:09:25,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:09:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:09:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:09:25,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:09:25,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514443872] [2022-12-11 22:09:25,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514443872] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:09:25,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931867372] [2022-12-11 22:09:25,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-11 22:09:25,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:09:25,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:09:25,364 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 22:09:25,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-11 22:09:25,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-11 22:09:25,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 22:09:25,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-11 22:09:25,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:09:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:09:25,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:09:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:09:25,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931867372] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:09:25,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:09:25,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-11 22:09:25,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594619037] [2022-12-11 22:09:25,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:09:25,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-11 22:09:25,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:09:25,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-11 22:09:25,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-12-11 22:09:25,599 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-11 22:09:25,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1262 places, 15763 transitions, 656389 flow. Second operand has 18 states, 18 states have (on average 58.611111111111114) internal successors, (1055), 18 states have internal predecessors, (1055), 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) [2022-12-11 22:09:25,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:09:25,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-11 22:09:25,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:11:54,863 INFO L130 PetriNetUnfolder]: 14564/39856 cut-off events. [2022-12-11 22:11:54,863 INFO L131 PetriNetUnfolder]: For 1088863/1110926 co-relation queries the response was YES. [2022-12-11 22:11:54,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662784 conditions, 39856 events. 14564/39856 cut-off events. For 1088863/1110926 co-relation queries the response was YES. Maximal size of possible extension queue 2460. Compared 519508 event pairs, 111 based on Foata normal form. 525/37976 useless extension candidates. Maximal degree in co-relation 636876. Up to 23058 conditions per place. [2022-12-11 22:11:55,285 INFO L137 encePairwiseOnDemand]: 68/80 looper letters, 9871 selfloop transitions, 7656 changer transitions 45/17624 dead transitions. [2022-12-11 22:11:55,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1338 places, 17624 transitions, 769095 flow [2022-12-11 22:11:55,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-12-11 22:11:55,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2022-12-11 22:11:55,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4649 transitions. [2022-12-11 22:11:55,288 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7547077922077922 [2022-12-11 22:11:55,288 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 1267 predicate places. [2022-12-11 22:11:55,288 INFO L82 GeneralOperation]: Start removeDead. Operand has 1338 places, 17624 transitions, 769095 flow [2022-12-11 22:11:55,977 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1338 places, 17579 transitions, 766828 flow [2022-12-11 22:11:55,977 INFO L495 AbstractCegarLoop]: Abstraction has has 1338 places, 17579 transitions, 766828 flow [2022-12-11 22:11:55,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.611111111111114) internal successors, (1055), 18 states have internal predecessors, (1055), 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) [2022-12-11 22:11:55,978 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:11:55,978 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:11:55,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-11 22:11:56,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-11 22:11:56,183 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:11:56,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:11:56,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1873584322, now seen corresponding path program 19 times [2022-12-11 22:11:56,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:11:56,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500899205] [2022-12-11 22:11:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:11:56,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:11:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:11:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:11:56,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:11:56,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500899205] [2022-12-11 22:11:56,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500899205] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:11:56,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601177872] [2022-12-11 22:11:56,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-11 22:11:56,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:11:56,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:11:56,326 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 22:11:56,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-11 22:11:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:11:56,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-11 22:11:56,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:11:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:11:56,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:11:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:11:56,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601177872] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:11:56,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:11:56,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-11 22:11:56,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666199785] [2022-12-11 22:11:56,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:11:56,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-11 22:11:56,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:11:56,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-11 22:11:56,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-12-11 22:11:56,603 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-11 22:11:56,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1338 places, 17579 transitions, 766828 flow. Second operand has 19 states, 19 states have (on average 58.8421052631579) internal successors, (1118), 19 states have internal predecessors, (1118), 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) [2022-12-11 22:11:56,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:11:56,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-11 22:11:56,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 22:15:16,717 INFO L130 PetriNetUnfolder]: 17146/46407 cut-off events. [2022-12-11 22:15:16,717 INFO L131 PetriNetUnfolder]: For 1387474/1411808 co-relation queries the response was YES. [2022-12-11 22:15:16,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809383 conditions, 46407 events. 17146/46407 cut-off events. For 1387474/1411808 co-relation queries the response was YES. Maximal size of possible extension queue 2877. Compared 614215 event pairs, 141 based on Foata normal form. 1429/45046 useless extension candidates. Maximal degree in co-relation 781780. Up to 27352 conditions per place. [2022-12-11 22:15:17,311 INFO L137 encePairwiseOnDemand]: 68/80 looper letters, 10684 selfloop transitions, 10344 changer transitions 28/21108 dead transitions. [2022-12-11 22:15:17,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1450 places, 21108 transitions, 962710 flow [2022-12-11 22:15:17,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-12-11 22:15:17,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2022-12-11 22:15:17,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 7063 transitions. [2022-12-11 22:15:17,315 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7481991525423729 [2022-12-11 22:15:17,315 INFO L295 CegarLoopForPetriNet]: 71 programPoint places, 1379 predicate places. [2022-12-11 22:15:17,315 INFO L82 GeneralOperation]: Start removeDead. Operand has 1450 places, 21108 transitions, 962710 flow [2022-12-11 22:15:18,125 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1450 places, 21080 transitions, 961289 flow [2022-12-11 22:15:18,125 INFO L495 AbstractCegarLoop]: Abstraction has has 1450 places, 21080 transitions, 961289 flow [2022-12-11 22:15:18,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.8421052631579) internal successors, (1118), 19 states have internal predecessors, (1118), 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) [2022-12-11 22:15:18,126 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 22:15:18,126 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 22:15:18,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-11 22:15:18,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-11 22:15:18,331 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 22:15:18,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 22:15:18,332 INFO L85 PathProgramCache]: Analyzing trace with hash 270683464, now seen corresponding path program 20 times [2022-12-11 22:15:18,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 22:15:18,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77881911] [2022-12-11 22:15:18,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 22:15:18,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 22:15:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 22:15:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:15:18,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 22:15:18,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77881911] [2022-12-11 22:15:18,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77881911] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 22:15:18,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592907830] [2022-12-11 22:15:18,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-11 22:15:18,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:15:18,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 22:15:18,480 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-11 22:15:18,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-11 22:15:18,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-11 22:15:18,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 22:15:18,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-11 22:15:18,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 22:15:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:15:18,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 22:15:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 22:15:18,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592907830] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 22:15:18,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 22:15:18,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-11 22:15:18,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815523001] [2022-12-11 22:15:18,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 22:15:18,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-11 22:15:18,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 22:15:18,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-11 22:15:18,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-12-11 22:15:18,693 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-12-11 22:15:18,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1450 places, 21080 transitions, 961289 flow. Second operand has 18 states, 18 states have (on average 58.388888888888886) internal successors, (1051), 18 states have internal predecessors, (1051), 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) [2022-12-11 22:15:18,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 22:15:18,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-12-11 22:15:18,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-12-11 22:18:39,573 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-11 22:18:39,573 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 [2022-12-11 22:18:39,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-12-11 22:18:39,670 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-11 22:18:39,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-11 22:18:39,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 22:18:39,875 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (18states, 56/80 universal loopers) in iteration 25,while PetriNetUnfolder was constructing finite prefix that currently has 584704 conditions, 30488 events (11659/30487 cut-off events. For 1033600/1049454 co-relation queries the response was YES. Maximal size of possible extension queue 2958. Compared 404367 event pairs, 82 based on Foata normal form. 450/31326 useless extension candidates. Maximal degree in co-relation 557132. Up to 17887 conditions per place.). [2022-12-11 22:18:39,877 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-11 22:18:39,877 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-11 22:18:39,877 INFO L445 BasicCegarLoop]: Path program histogram: [20, 4, 1] [2022-12-11 22:18:39,880 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-11 22:18:39,880 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-11 22:18:39,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.12 10:18:39 BasicIcfg [2022-12-11 22:18:39,884 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-11 22:18:39,884 INFO L158 Benchmark]: Toolchain (without parser) took 852088.62ms. Allocated memory was 184.5MB in the beginning and 2.7GB in the end (delta: 2.5GB). Free memory was 160.4MB in the beginning and 811.4MB in the end (delta: -651.0MB). Peak memory consumption was 2.6GB. Max. memory is 8.0GB. [2022-12-11 22:18:39,884 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 184.5MB. Free memory is still 160.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-11 22:18:39,884 INFO L158 Benchmark]: CACSL2BoogieTranslator took 204.96ms. Allocated memory is still 184.5MB. Free memory was 160.4MB in the beginning and 148.6MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-11 22:18:39,885 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.91ms. Allocated memory is still 184.5MB. Free memory was 148.6MB in the beginning and 147.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-11 22:18:39,885 INFO L158 Benchmark]: Boogie Preprocessor took 27.03ms. Allocated memory is still 184.5MB. Free memory was 147.1MB in the beginning and 146.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-11 22:18:39,885 INFO L158 Benchmark]: RCFGBuilder took 385.28ms. Allocated memory is still 184.5MB. Free memory was 146.0MB in the beginning and 132.4MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-12-11 22:18:39,885 INFO L158 Benchmark]: TraceAbstraction took 851436.16ms. Allocated memory was 184.5MB in the beginning and 2.7GB in the end (delta: 2.5GB). Free memory was 130.8MB in the beginning and 811.4MB in the end (delta: -680.6MB). Peak memory consumption was 2.6GB. Max. memory is 8.0GB. [2022-12-11 22:18:39,886 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 184.5MB. Free memory is still 160.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 204.96ms. Allocated memory is still 184.5MB. Free memory was 160.4MB in the beginning and 148.6MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 29.91ms. Allocated memory is still 184.5MB. Free memory was 148.6MB in the beginning and 147.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.03ms. Allocated memory is still 184.5MB. Free memory was 147.1MB in the beginning and 146.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 385.28ms. Allocated memory is still 184.5MB. Free memory was 146.0MB in the beginning and 132.4MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 851436.16ms. Allocated memory was 184.5MB in the beginning and 2.7GB in the end (delta: 2.5GB). Free memory was 130.8MB in the beginning and 811.4MB in the end (delta: -680.6MB). Peak memory consumption was 2.6GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (18states, 56/80 universal loopers) in iteration 25,while PetriNetUnfolder was constructing finite prefix that currently has 584704 conditions, 30488 events (11659/30487 cut-off events. For 1033600/1049454 co-relation queries the response was YES. Maximal size of possible extension queue 2958. Compared 404367 event pairs, 82 based on Foata normal form. 450/31326 useless extension candidates. Maximal degree in co-relation 557132. Up to 17887 conditions per place.). - TimeoutResultAtElement [Line: 70]: 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 (18states, 56/80 universal loopers) in iteration 25,while PetriNetUnfolder was constructing finite prefix that currently has 584704 conditions, 30488 events (11659/30487 cut-off events. For 1033600/1049454 co-relation queries the response was YES. Maximal size of possible extension queue 2958. Compared 404367 event pairs, 82 based on Foata normal form. 450/31326 useless extension candidates. Maximal degree in co-relation 557132. Up to 17887 conditions per place.). - TimeoutResultAtElement [Line: 71]: 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 (18states, 56/80 universal loopers) in iteration 25,while PetriNetUnfolder was constructing finite prefix that currently has 584704 conditions, 30488 events (11659/30487 cut-off events. For 1033600/1049454 co-relation queries the response was YES. Maximal size of possible extension queue 2958. Compared 404367 event pairs, 82 based on Foata normal form. 450/31326 useless extension candidates. Maximal degree in co-relation 557132. Up to 17887 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 95 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 4.2s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 851.3s, OverallIterations: 25, TraceHistogramMax: 2, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 832.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5563 SdHoareTripleChecker+Valid, 8.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5563 mSDsluCounter, 3999 SdHoareTripleChecker+Invalid, 7.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3372 mSDsCounter, 487 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15473 IncrementalHoareTripleChecker+Invalid, 15960 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 487 mSolverCounterUnsat, 627 mSDtfsCounter, 15473 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4428 GetRequests, 2748 SyntacticMatches, 30 SemanticMatches, 1650 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55272 ImplicationChecksByTransitivity, 26.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=961289occurred in iteration=24, InterpolantAutomatonStates: 1440, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.2s AutomataMinimizationTime, 24 MinimizatonAttempts, 9236 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 3158 NumberOfCodeBlocks, 3100 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 4524 ConstructedInterpolants, 0 QuantifiedInterpolants, 15771 SizeOfPredicates, 163 NumberOfNonLiveVariables, 3413 ConjunctsInSsa, 289 ConjunctsInUnsatCore, 68 InterpolantComputations, 4 PerfectInterpolantSequences, 223/469 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