/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 22:03:15,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 22:03:15,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 22:03:15,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 22:03:15,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 22:03:15,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 22:03:15,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 22:03:15,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 22:03:15,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 22:03:15,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 22:03:15,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 22:03:15,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 22:03:15,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 22:03:15,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 22:03:15,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 22:03:15,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 22:03:15,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 22:03:15,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 22:03:15,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 22:03:15,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 22:03:15,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 22:03:15,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 22:03:15,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 22:03:15,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 22:03:15,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-12-05 22:03:15,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 22:03:15,093 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 22:03:15,094 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 22:03:15,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 22:03:15,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 22:03:15,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 22:03:15,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 22:03:15,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 22:03:15,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 22:03:15,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 22:03:15,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 22:03:15,100 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-05 22:03:15,124 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 22:03:15,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 22:03:15,124 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 22:03:15,125 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 22:03:15,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 22:03:15,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 22:03:15,125 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 22:03:15,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 22:03:15,125 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 22:03:15,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 22:03:15,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 22:03:15,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 22:03:15,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 22:03:15,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 22:03:15,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 22:03:15,126 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 22:03:15,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 22:03:15,126 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 22:03:15,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 22:03:15,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 22:03:15,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 22:03:15,127 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 22:03:15,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 22:03:15,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 22:03:15,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 22:03:15,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 22:03:15,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 22:03:15,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 22:03:15,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 22:03:15,127 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 22:03:15,128 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 22:03:15,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 22:03:15,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 22:03:15,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 22:03:15,401 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 22:03:15,402 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 22:03:15,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2022-12-05 22:03:16,366 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 22:03:16,500 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 22:03:16,501 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2022-12-05 22:03:16,509 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/328fd1508/eb7a64beb24849b1b8add6e79e89fda0/FLAGe0fe65b47 [2022-12-05 22:03:16,519 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/328fd1508/eb7a64beb24849b1b8add6e79e89fda0 [2022-12-05 22:03:16,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 22:03:16,522 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 22:03:16,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 22:03:16,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 22:03:16,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 22:03:16,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 10:03:16" (1/1) ... [2022-12-05 22:03:16,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@326feb93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:03:16, skipping insertion in model container [2022-12-05 22:03:16,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 10:03:16" (1/1) ... [2022-12-05 22:03:16,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 22:03:16,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 22:03:16,671 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:03:16,672 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:03:16,675 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:03:16,676 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:03:16,682 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-nonblocking-cntr.wvr.c[2037,2050] [2022-12-05 22:03:16,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 22:03:16,692 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 22:03:16,704 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:03:16,704 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:03:16,705 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:03:16,706 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:03:16,712 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-nonblocking-cntr.wvr.c[2037,2050] [2022-12-05 22:03:16,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 22:03:16,727 INFO L208 MainTranslator]: Completed translation [2022-12-05 22:03:16,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:03:16 WrapperNode [2022-12-05 22:03:16,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 22:03:16,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 22:03:16,729 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 22:03:16,729 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 22:03:16,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:03:16" (1/1) ... [2022-12-05 22:03:16,738 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:03:16" (1/1) ... [2022-12-05 22:03:16,754 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-12-05 22:03:16,754 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 22:03:16,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 22:03:16,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 22:03:16,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 22:03:16,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:03:16" (1/1) ... [2022-12-05 22:03:16,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:03:16" (1/1) ... [2022-12-05 22:03:16,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:03:16" (1/1) ... [2022-12-05 22:03:16,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:03:16" (1/1) ... [2022-12-05 22:03:16,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:03:16" (1/1) ... [2022-12-05 22:03:16,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:03:16" (1/1) ... [2022-12-05 22:03:16,768 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:03:16" (1/1) ... [2022-12-05 22:03:16,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:03:16" (1/1) ... [2022-12-05 22:03:16,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 22:03:16,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 22:03:16,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 22:03:16,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 22:03:16,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:03:16" (1/1) ... [2022-12-05 22:03:16,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 22:03:16,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:03:16,818 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) [2022-12-05 22:03:16,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 22:03:16,845 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 22:03:16,845 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 22:03:16,845 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 22:03:16,845 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 22:03:16,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 22:03:16,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 22:03:16,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 22:03:16,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 22:03:16,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 22:03:16,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 22:03:16,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 22:03:16,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 22:03:16,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 22:03:16,847 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 22:03:16,837 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 [2022-12-05 22:03:16,924 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 22:03:16,925 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 22:03:17,100 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 22:03:17,137 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 22:03:17,137 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-05 22:03:17,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 10:03:17 BoogieIcfgContainer [2022-12-05 22:03:17,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 22:03:17,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 22:03:17,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 22:03:17,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 22:03:17,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 10:03:16" (1/3) ... [2022-12-05 22:03:17,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9ce479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 10:03:17, skipping insertion in model container [2022-12-05 22:03:17,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:03:16" (2/3) ... [2022-12-05 22:03:17,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9ce479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 10:03:17, skipping insertion in model container [2022-12-05 22:03:17,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 10:03:17" (3/3) ... [2022-12-05 22:03:17,145 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2022-12-05 22:03:17,157 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 22:03:17,157 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 22:03:17,158 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 22:03:17,198 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-05 22:03:17,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 166 flow [2022-12-05 22:03:17,248 INFO L130 PetriNetUnfolder]: 6/73 cut-off events. [2022-12-05 22:03:17,249 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 22:03:17,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 6/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 42 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2022-12-05 22:03:17,252 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 75 transitions, 166 flow [2022-12-05 22:03:17,255 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 65 transitions, 142 flow [2022-12-05 22:03:17,256 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:03:17,267 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 65 transitions, 142 flow [2022-12-05 22:03:17,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 65 transitions, 142 flow [2022-12-05 22:03:17,284 INFO L130 PetriNetUnfolder]: 6/65 cut-off events. [2022-12-05 22:03:17,284 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 22:03:17,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 65 events. 6/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2022-12-05 22:03:17,286 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 65 transitions, 142 flow [2022-12-05 22:03:17,287 INFO L188 LiptonReduction]: Number of co-enabled transitions 404 [2022-12-05 22:03:18,942 INFO L203 LiptonReduction]: Total number of compositions: 50 [2022-12-05 22:03:18,952 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 22:03:18,956 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;@255dd94d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 22:03:18,956 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-05 22:03:18,959 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-12-05 22:03:18,959 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 22:03:18,959 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:18,972 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:18,972 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1047005972, now seen corresponding path program 1 times [2022-12-05 22:03:18,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:18,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314172689] [2022-12-05 22:03:18,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:18,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:19,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:19,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314172689] [2022-12-05 22:03:19,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314172689] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:03:19,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:03:19,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:03:19,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963850557] [2022-12-05 22:03:19,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:03:19,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:03:19,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:19,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:03:19,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:03:19,300 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-05 22:03:19,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-12-05 22:03:19,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:19,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-05 22:03:19,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:19,354 INFO L130 PetriNetUnfolder]: 59/100 cut-off events. [2022-12-05 22:03:19,355 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-05 22:03:19,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 100 events. 59/100 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 250 event pairs, 23 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 165. Up to 78 conditions per place. [2022-12-05 22:03:19,357 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2022-12-05 22:03:19,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2022-12-05 22:03:19,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:03:19,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:03:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 25 transitions. [2022-12-05 22:03:19,365 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2022-12-05 22:03:19,366 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 25 transitions. [2022-12-05 22:03:19,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2022-12-05 22:03:19,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 22:03:19,369 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2022-12-05 22:03:19,370 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2022-12-05 22:03:19,373 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2022-12-05 22:03:19,373 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2022-12-05 22:03:19,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-12-05 22:03:19,373 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:19,373 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:19,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 22:03:19,374 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:19,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:19,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1521658877, now seen corresponding path program 1 times [2022-12-05 22:03:19,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:19,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185255112] [2022-12-05 22:03:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:19,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:19,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:19,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185255112] [2022-12-05 22:03:19,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185255112] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:03:19,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:03:19,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 22:03:19,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224557743] [2022-12-05 22:03:19,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:03:19,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 22:03:19,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:19,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 22:03:19,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 22:03:19,494 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:03:19,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-12-05 22:03:19,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:19,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:03:19,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:19,589 INFO L130 PetriNetUnfolder]: 86/161 cut-off events. [2022-12-05 22:03:19,590 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-12-05 22:03:19,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 161 events. 86/161 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 478 event pairs, 33 based on Foata normal form. 4/131 useless extension candidates. Maximal degree in co-relation 89. Up to 93 conditions per place. [2022-12-05 22:03:19,599 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 30 selfloop transitions, 3 changer transitions 6/39 dead transitions. [2022-12-05 22:03:19,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 39 transitions, 197 flow [2022-12-05 22:03:19,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 22:03:19,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 22:03:19,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 37 transitions. [2022-12-05 22:03:19,600 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2022-12-05 22:03:19,600 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 5 states and 37 transitions. [2022-12-05 22:03:19,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 39 transitions, 197 flow [2022-12-05 22:03:19,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 183 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-05 22:03:19,601 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 64 flow [2022-12-05 22:03:19,602 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2022-12-05 22:03:19,602 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2022-12-05 22:03:19,602 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 64 flow [2022-12-05 22:03:19,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-12-05 22:03:19,602 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:19,602 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:19,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 22:03:19,603 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:19,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:19,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1239189377, now seen corresponding path program 2 times [2022-12-05 22:03:19,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:19,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802885558] [2022-12-05 22:03:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:19,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:19,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:19,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802885558] [2022-12-05 22:03:19,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802885558] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:03:19,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612747879] [2022-12-05 22:03:19,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 22:03:19,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:19,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:03:19,729 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) [2022-12-05 22:03:19,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 22:03:19,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-05 22:03:19,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:03:19,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-05 22:03:19,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:03:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:03:19,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 22:03:19,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612747879] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:03:19,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 22:03:19,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-05 22:03:19,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356762275] [2022-12-05 22:03:19,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:03:19,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:03:19,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:19,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:03:19,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-05 22:03:19,852 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-05 22:03:19,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-12-05 22:03:19,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:19,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-05 22:03:19,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:19,900 INFO L130 PetriNetUnfolder]: 51/94 cut-off events. [2022-12-05 22:03:19,900 INFO L131 PetriNetUnfolder]: For 52/60 co-relation queries the response was YES. [2022-12-05 22:03:19,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 94 events. 51/94 cut-off events. For 52/60 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 225 event pairs, 24 based on Foata normal form. 17/93 useless extension candidates. Maximal degree in co-relation 133. Up to 73 conditions per place. [2022-12-05 22:03:19,901 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2022-12-05 22:03:19,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 23 transitions, 121 flow [2022-12-05 22:03:19,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:03:19,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:03:19,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 25 transitions. [2022-12-05 22:03:19,902 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2022-12-05 22:03:19,902 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 64 flow. Second operand 4 states and 25 transitions. [2022-12-05 22:03:19,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 23 transitions, 121 flow [2022-12-05 22:03:19,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 23 transitions, 111 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-05 22:03:19,903 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 56 flow [2022-12-05 22:03:19,903 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2022-12-05 22:03:19,904 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2022-12-05 22:03:19,904 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 56 flow [2022-12-05 22:03:19,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-12-05 22:03:19,904 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:19,904 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:19,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-05 22:03:20,105 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 [2022-12-05 22:03:20,105 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:20,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:20,106 INFO L85 PathProgramCache]: Analyzing trace with hash 860710127, now seen corresponding path program 1 times [2022-12-05 22:03:20,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:20,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340309110] [2022-12-05 22:03:20,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:20,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:03:20,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:20,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340309110] [2022-12-05 22:03:20,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340309110] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:03:20,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140601906] [2022-12-05 22:03:20,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:20,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:20,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:03:20,211 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) [2022-12-05 22:03:20,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 22:03:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:20,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 22:03:20,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:03:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:03:20,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:03:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:20,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140601906] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 22:03:20,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 22:03:20,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [2, 2] total 4 [2022-12-05 22:03:20,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646766018] [2022-12-05 22:03:20,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:03:20,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 22:03:20,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:20,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 22:03:20,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-05 22:03:20,445 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 22:03:20,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2022-12-05 22:03:20,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:20,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 22:03:20,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:20,529 INFO L130 PetriNetUnfolder]: 84/156 cut-off events. [2022-12-05 22:03:20,529 INFO L131 PetriNetUnfolder]: For 27/46 co-relation queries the response was YES. [2022-12-05 22:03:20,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 156 events. 84/156 cut-off events. For 27/46 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 465 event pairs, 6 based on Foata normal form. 20/135 useless extension candidates. Maximal degree in co-relation 147. Up to 61 conditions per place. [2022-12-05 22:03:20,530 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 28 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2022-12-05 22:03:20,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 40 transitions, 200 flow [2022-12-05 22:03:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:03:20,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:03:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2022-12-05 22:03:20,531 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7166666666666667 [2022-12-05 22:03:20,531 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 56 flow. Second operand 4 states and 43 transitions. [2022-12-05 22:03:20,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 40 transitions, 200 flow [2022-12-05 22:03:20,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 194 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-05 22:03:20,532 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 94 flow [2022-12-05 22:03:20,532 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2022-12-05 22:03:20,533 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2022-12-05 22:03:20,533 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 94 flow [2022-12-05 22:03:20,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2022-12-05 22:03:20,533 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:20,533 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:20,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-05 22:03:20,734 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 [2022-12-05 22:03:20,734 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:20,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:20,735 INFO L85 PathProgramCache]: Analyzing trace with hash 165515865, now seen corresponding path program 2 times [2022-12-05 22:03:20,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:20,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813123574] [2022-12-05 22:03:20,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:20,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:03:20,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:20,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813123574] [2022-12-05 22:03:20,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813123574] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:03:20,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742932977] [2022-12-05 22:03:20,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 22:03:20,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:20,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:03:20,800 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) [2022-12-05 22:03:20,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-05 22:03:20,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:03:20,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:03:20,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-05 22:03:20,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:03:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:03:20,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:03:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:03:20,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742932977] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:03:20,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:03:20,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-12-05 22:03:20,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805609025] [2022-12-05 22:03:20,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:03:20,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-05 22:03:20,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:20,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-05 22:03:20,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-12-05 22:03:20,972 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-05 22:03:20,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 94 flow. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 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) [2022-12-05 22:03:20,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:20,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-05 22:03:20,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:21,051 INFO L130 PetriNetUnfolder]: 132/239 cut-off events. [2022-12-05 22:03:21,051 INFO L131 PetriNetUnfolder]: For 239/253 co-relation queries the response was YES. [2022-12-05 22:03:21,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 239 events. 132/239 cut-off events. For 239/253 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 757 event pairs, 32 based on Foata normal form. 28/267 useless extension candidates. Maximal degree in co-relation 232. Up to 190 conditions per place. [2022-12-05 22:03:21,054 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 30 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2022-12-05 22:03:21,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 39 transitions, 247 flow [2022-12-05 22:03:21,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 22:03:21,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 22:03:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 35 transitions. [2022-12-05 22:03:21,056 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2022-12-05 22:03:21,056 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 94 flow. Second operand 5 states and 35 transitions. [2022-12-05 22:03:21,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 39 transitions, 247 flow [2022-12-05 22:03:21,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 39 transitions, 247 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-05 22:03:21,060 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 168 flow [2022-12-05 22:03:21,060 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2022-12-05 22:03:21,061 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2022-12-05 22:03:21,061 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 168 flow [2022-12-05 22:03:21,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 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) [2022-12-05 22:03:21,061 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:21,062 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:21,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-05 22:03:21,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:21,269 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:21,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:21,269 INFO L85 PathProgramCache]: Analyzing trace with hash -749049313, now seen corresponding path program 3 times [2022-12-05 22:03:21,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:21,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448667302] [2022-12-05 22:03:21,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:21,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:21,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:21,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448667302] [2022-12-05 22:03:21,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448667302] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:03:21,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181201736] [2022-12-05 22:03:21,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 22:03:21,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:21,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:03:21,378 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) [2022-12-05 22:03:21,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-05 22:03:21,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 22:03:21,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:03:21,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-05 22:03:21,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:03:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:21,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:03:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:21,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181201736] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:03:21,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:03:21,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-05 22:03:21,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743437699] [2022-12-05 22:03:21,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:03:21,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 22:03:21,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:21,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 22:03:21,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-12-05 22:03:21,630 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:03:21,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 168 flow. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 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) [2022-12-05 22:03:21,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:21,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:03:21,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:21,956 INFO L130 PetriNetUnfolder]: 216/388 cut-off events. [2022-12-05 22:03:21,956 INFO L131 PetriNetUnfolder]: For 595/595 co-relation queries the response was YES. [2022-12-05 22:03:21,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 388 events. 216/388 cut-off events. For 595/595 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1467 event pairs, 4 based on Foata normal form. 12/400 useless extension candidates. Maximal degree in co-relation 775. Up to 135 conditions per place. [2022-12-05 22:03:21,959 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 64 selfloop transitions, 29 changer transitions 10/103 dead transitions. [2022-12-05 22:03:21,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 103 transitions, 687 flow [2022-12-05 22:03:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-05 22:03:21,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-05 22:03:21,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 97 transitions. [2022-12-05 22:03:21,962 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2022-12-05 22:03:21,963 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 168 flow. Second operand 16 states and 97 transitions. [2022-12-05 22:03:21,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 103 transitions, 687 flow [2022-12-05 22:03:21,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 103 transitions, 677 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-05 22:03:21,968 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 380 flow [2022-12-05 22:03:21,969 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=380, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2022-12-05 22:03:21,970 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2022-12-05 22:03:21,970 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 380 flow [2022-12-05 22:03:21,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 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) [2022-12-05 22:03:21,971 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:21,971 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:21,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-05 22:03:22,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:22,176 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:22,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:22,177 INFO L85 PathProgramCache]: Analyzing trace with hash -717528074, now seen corresponding path program 4 times [2022-12-05 22:03:22,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:22,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026662879] [2022-12-05 22:03:22,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:22,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:22,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:22,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026662879] [2022-12-05 22:03:22,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026662879] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:03:22,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092354722] [2022-12-05 22:03:22,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 22:03:22,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:22,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:03:22,295 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) [2022-12-05 22:03:22,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-05 22:03:22,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 22:03:22,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:03:22,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-05 22:03:22,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:03:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:22,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:03:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:22,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092354722] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:03:22,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:03:22,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5] total 7 [2022-12-05 22:03:22,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196343153] [2022-12-05 22:03:22,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:03:22,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 22:03:22,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:22,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 22:03:22,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-05 22:03:22,552 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 22:03:22,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 380 flow. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 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) [2022-12-05 22:03:22,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:22,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 22:03:22,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:22,671 INFO L130 PetriNetUnfolder]: 294/534 cut-off events. [2022-12-05 22:03:22,671 INFO L131 PetriNetUnfolder]: For 2627/2676 co-relation queries the response was YES. [2022-12-05 22:03:22,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 534 events. 294/534 cut-off events. For 2627/2676 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2338 event pairs, 38 based on Foata normal form. 38/566 useless extension candidates. Maximal degree in co-relation 1938. Up to 207 conditions per place. [2022-12-05 22:03:22,674 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 48 selfloop transitions, 24 changer transitions 4/82 dead transitions. [2022-12-05 22:03:22,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 82 transitions, 781 flow [2022-12-05 22:03:22,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 22:03:22,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 22:03:22,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2022-12-05 22:03:22,675 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7466666666666667 [2022-12-05 22:03:22,675 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 380 flow. Second operand 5 states and 56 transitions. [2022-12-05 22:03:22,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 82 transitions, 781 flow [2022-12-05 22:03:22,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 82 transitions, 698 flow, removed 32 selfloop flow, removed 5 redundant places. [2022-12-05 22:03:22,680 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 545 flow [2022-12-05 22:03:22,680 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=545, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2022-12-05 22:03:22,680 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 34 predicate places. [2022-12-05 22:03:22,680 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 545 flow [2022-12-05 22:03:22,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 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) [2022-12-05 22:03:22,681 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:22,681 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:22,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-05 22:03:22,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:22,886 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:22,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:22,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1929586511, now seen corresponding path program 5 times [2022-12-05 22:03:22,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:22,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012685051] [2022-12-05 22:03:22,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:22,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:22,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:22,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012685051] [2022-12-05 22:03:22,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012685051] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:03:22,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591213530] [2022-12-05 22:03:22,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 22:03:22,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:22,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:03:22,959 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) [2022-12-05 22:03:22,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-05 22:03:23,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:03:23,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:03:23,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-05 22:03:23,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:03:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:23,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:03:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:23,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591213530] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:03:23,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:03:23,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-05 22:03:23,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763661906] [2022-12-05 22:03:23,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:03:23,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 22:03:23,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:23,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 22:03:23,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-12-05 22:03:23,123 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:03:23,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 545 flow. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 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) [2022-12-05 22:03:23,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:23,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:03:23,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:23,487 INFO L130 PetriNetUnfolder]: 458/825 cut-off events. [2022-12-05 22:03:23,487 INFO L131 PetriNetUnfolder]: For 4459/4459 co-relation queries the response was YES. [2022-12-05 22:03:23,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4112 conditions, 825 events. 458/825 cut-off events. For 4459/4459 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3948 event pairs, 1 based on Foata normal form. 54/879 useless extension candidates. Maximal degree in co-relation 2730. Up to 334 conditions per place. [2022-12-05 22:03:23,491 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 75 selfloop transitions, 68 changer transitions 2/145 dead transitions. [2022-12-05 22:03:23,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 145 transitions, 1505 flow [2022-12-05 22:03:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-05 22:03:23,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-05 22:03:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 96 transitions. [2022-12-05 22:03:23,492 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3764705882352941 [2022-12-05 22:03:23,492 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 545 flow. Second operand 17 states and 96 transitions. [2022-12-05 22:03:23,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 145 transitions, 1505 flow [2022-12-05 22:03:23,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 145 transitions, 1479 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-12-05 22:03:23,500 INFO L231 Difference]: Finished difference. Result has 78 places, 92 transitions, 1204 flow [2022-12-05 22:03:23,500 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1204, PETRI_PLACES=78, PETRI_TRANSITIONS=92} [2022-12-05 22:03:23,500 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 58 predicate places. [2022-12-05 22:03:23,500 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 92 transitions, 1204 flow [2022-12-05 22:03:23,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 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) [2022-12-05 22:03:23,501 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:23,501 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:23,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-05 22:03:23,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:23,706 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:23,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:23,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1833792153, now seen corresponding path program 6 times [2022-12-05 22:03:23,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:23,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296910232] [2022-12-05 22:03:23,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:23,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:23,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:23,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296910232] [2022-12-05 22:03:23,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296910232] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:03:23,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77258272] [2022-12-05 22:03:23,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 22:03:23,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:23,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:03:23,774 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) [2022-12-05 22:03:23,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-05 22:03:23,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 22:03:23,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:03:23,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 22:03:23,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:03:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:23,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:03:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:23,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77258272] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:03:23,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:03:23,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-05 22:03:23,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196082183] [2022-12-05 22:03:23,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:03:23,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 22:03:23,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:23,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 22:03:23,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-12-05 22:03:23,966 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:03:23,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 92 transitions, 1204 flow. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:03:23,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:23,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:03:23,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:24,528 INFO L130 PetriNetUnfolder]: 687/1287 cut-off events. [2022-12-05 22:03:24,529 INFO L131 PetriNetUnfolder]: For 18079/18079 co-relation queries the response was YES. [2022-12-05 22:03:24,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8627 conditions, 1287 events. 687/1287 cut-off events. For 18079/18079 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 7124 event pairs, 4 based on Foata normal form. 24/1311 useless extension candidates. Maximal degree in co-relation 5599. Up to 463 conditions per place. [2022-12-05 22:03:24,537 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 106 selfloop transitions, 138 changer transitions 16/260 dead transitions. [2022-12-05 22:03:24,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 260 transitions, 3676 flow [2022-12-05 22:03:24,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-05 22:03:24,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-05 22:03:24,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 125 transitions. [2022-12-05 22:03:24,538 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2022-12-05 22:03:24,538 INFO L175 Difference]: Start difference. First operand has 78 places, 92 transitions, 1204 flow. Second operand 25 states and 125 transitions. [2022-12-05 22:03:24,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 260 transitions, 3676 flow [2022-12-05 22:03:24,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 260 transitions, 3457 flow, removed 103 selfloop flow, removed 3 redundant places. [2022-12-05 22:03:24,583 INFO L231 Difference]: Finished difference. Result has 108 places, 172 transitions, 2633 flow [2022-12-05 22:03:24,583 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2633, PETRI_PLACES=108, PETRI_TRANSITIONS=172} [2022-12-05 22:03:24,583 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 88 predicate places. [2022-12-05 22:03:24,584 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 172 transitions, 2633 flow [2022-12-05 22:03:24,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:03:24,584 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:24,584 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:24,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-05 22:03:24,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:24,788 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:24,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:24,788 INFO L85 PathProgramCache]: Analyzing trace with hash -971944393, now seen corresponding path program 7 times [2022-12-05 22:03:24,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:24,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937740413] [2022-12-05 22:03:24,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:24,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:24,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:24,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937740413] [2022-12-05 22:03:24,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937740413] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:03:24,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461182921] [2022-12-05 22:03:24,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 22:03:24,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:24,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:03:24,865 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) [2022-12-05 22:03:24,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-05 22:03:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:24,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 22:03:24,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:03:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:24,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:03:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:25,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461182921] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:03:25,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:03:25,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-05 22:03:25,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115606236] [2022-12-05 22:03:25,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:03:25,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 22:03:25,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:25,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 22:03:25,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-12-05 22:03:25,014 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:03:25,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 172 transitions, 2633 flow. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:03:25,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:25,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:03:25,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:25,508 INFO L130 PetriNetUnfolder]: 599/1177 cut-off events. [2022-12-05 22:03:25,509 INFO L131 PetriNetUnfolder]: For 29352/29352 co-relation queries the response was YES. [2022-12-05 22:03:25,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8993 conditions, 1177 events. 599/1177 cut-off events. For 29352/29352 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6781 event pairs, 37 based on Foata normal form. 56/1233 useless extension candidates. Maximal degree in co-relation 7203. Up to 334 conditions per place. [2022-12-05 22:03:25,517 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 101 selfloop transitions, 131 changer transitions 10/242 dead transitions. [2022-12-05 22:03:25,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 242 transitions, 3653 flow [2022-12-05 22:03:25,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-05 22:03:25,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-05 22:03:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 118 transitions. [2022-12-05 22:03:25,518 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3575757575757576 [2022-12-05 22:03:25,518 INFO L175 Difference]: Start difference. First operand has 108 places, 172 transitions, 2633 flow. Second operand 22 states and 118 transitions. [2022-12-05 22:03:25,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 242 transitions, 3653 flow [2022-12-05 22:03:25,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 242 transitions, 3249 flow, removed 197 selfloop flow, removed 4 redundant places. [2022-12-05 22:03:25,576 INFO L231 Difference]: Finished difference. Result has 127 places, 169 transitions, 2587 flow [2022-12-05 22:03:25,577 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2587, PETRI_PLACES=127, PETRI_TRANSITIONS=169} [2022-12-05 22:03:25,577 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 107 predicate places. [2022-12-05 22:03:25,577 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 169 transitions, 2587 flow [2022-12-05 22:03:25,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:03:25,577 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:25,578 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:25,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-05 22:03:25,781 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,SelfDestructingSolverStorable9 [2022-12-05 22:03:25,782 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:25,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:25,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1115421217, now seen corresponding path program 8 times [2022-12-05 22:03:25,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:25,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885577025] [2022-12-05 22:03:25,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:25,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:25,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:25,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885577025] [2022-12-05 22:03:25,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885577025] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:03:25,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713796373] [2022-12-05 22:03:25,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 22:03:25,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:25,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:03:25,857 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) [2022-12-05 22:03:25,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-05 22:03:25,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:03:25,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:03:25,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-05 22:03:25,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:03:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:25,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:03:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:26,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713796373] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:03:26,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:03:26,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-12-05 22:03:26,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104169789] [2022-12-05 22:03:26,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:03:26,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 22:03:26,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:26,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 22:03:26,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-12-05 22:03:26,068 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:03:26,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 169 transitions, 2587 flow. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 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) [2022-12-05 22:03:26,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:26,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:03:26,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:26,552 INFO L130 PetriNetUnfolder]: 764/1554 cut-off events. [2022-12-05 22:03:26,552 INFO L131 PetriNetUnfolder]: For 49589/49589 co-relation queries the response was YES. [2022-12-05 22:03:26,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11734 conditions, 1554 events. 764/1554 cut-off events. For 49589/49589 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9760 event pairs, 119 based on Foata normal form. 96/1650 useless extension candidates. Maximal degree in co-relation 9963. Up to 969 conditions per place. [2022-12-05 22:03:26,563 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 190 selfloop transitions, 87 changer transitions 8/285 dead transitions. [2022-12-05 22:03:26,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 285 transitions, 4490 flow [2022-12-05 22:03:26,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-05 22:03:26,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-05 22:03:26,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 115 transitions. [2022-12-05 22:03:26,564 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2022-12-05 22:03:26,564 INFO L175 Difference]: Start difference. First operand has 127 places, 169 transitions, 2587 flow. Second operand 20 states and 115 transitions. [2022-12-05 22:03:26,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 285 transitions, 4490 flow [2022-12-05 22:03:26,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 285 transitions, 4382 flow, removed 12 selfloop flow, removed 11 redundant places. [2022-12-05 22:03:26,636 INFO L231 Difference]: Finished difference. Result has 141 places, 211 transitions, 3548 flow [2022-12-05 22:03:26,637 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=2483, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3548, PETRI_PLACES=141, PETRI_TRANSITIONS=211} [2022-12-05 22:03:26,637 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 121 predicate places. [2022-12-05 22:03:26,637 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 211 transitions, 3548 flow [2022-12-05 22:03:26,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 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) [2022-12-05 22:03:26,637 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:26,637 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:26,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-05 22:03:26,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:26,842 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:26,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:26,842 INFO L85 PathProgramCache]: Analyzing trace with hash 399029215, now seen corresponding path program 9 times [2022-12-05 22:03:26,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:26,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196622243] [2022-12-05 22:03:26,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:26,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:26,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:26,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196622243] [2022-12-05 22:03:26,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196622243] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:03:26,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170072078] [2022-12-05 22:03:26,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 22:03:26,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:26,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:03:26,945 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) [2022-12-05 22:03:26,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-05 22:03:27,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 22:03:27,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:03:27,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 22:03:27,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:03:27,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:27,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:03:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:27,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170072078] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:03:27,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:03:27,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2022-12-05 22:03:27,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169107934] [2022-12-05 22:03:27,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:03:27,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 22:03:27,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:27,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 22:03:27,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-12-05 22:03:27,157 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:03:27,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 211 transitions, 3548 flow. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:03:27,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:27,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:03:27,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:27,570 INFO L130 PetriNetUnfolder]: 756/1536 cut-off events. [2022-12-05 22:03:27,570 INFO L131 PetriNetUnfolder]: For 50160/50160 co-relation queries the response was YES. [2022-12-05 22:03:27,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13075 conditions, 1536 events. 756/1536 cut-off events. For 50160/50160 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 9698 event pairs, 19 based on Foata normal form. 8/1544 useless extension candidates. Maximal degree in co-relation 11220. Up to 468 conditions per place. [2022-12-05 22:03:27,582 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 154 selfloop transitions, 120 changer transitions 9/283 dead transitions. [2022-12-05 22:03:27,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 283 transitions, 5047 flow [2022-12-05 22:03:27,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-05 22:03:27,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-05 22:03:27,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 95 transitions. [2022-12-05 22:03:27,583 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.31666666666666665 [2022-12-05 22:03:27,583 INFO L175 Difference]: Start difference. First operand has 141 places, 211 transitions, 3548 flow. Second operand 20 states and 95 transitions. [2022-12-05 22:03:27,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 283 transitions, 5047 flow [2022-12-05 22:03:27,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 283 transitions, 4729 flow, removed 132 selfloop flow, removed 9 redundant places. [2022-12-05 22:03:27,669 INFO L231 Difference]: Finished difference. Result has 155 places, 225 transitions, 3870 flow [2022-12-05 22:03:27,669 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=3266, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3870, PETRI_PLACES=155, PETRI_TRANSITIONS=225} [2022-12-05 22:03:27,670 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 135 predicate places. [2022-12-05 22:03:27,670 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 225 transitions, 3870 flow [2022-12-05 22:03:27,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:03:27,670 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:27,670 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:27,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-05 22:03:27,874 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,SelfDestructingSolverStorable11 [2022-12-05 22:03:27,874 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:27,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:27,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1764021872, now seen corresponding path program 10 times [2022-12-05 22:03:27,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:27,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516328611] [2022-12-05 22:03:27,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:27,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:27,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:27,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516328611] [2022-12-05 22:03:27,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516328611] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:03:27,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112301744] [2022-12-05 22:03:27,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 22:03:27,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:27,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:03:27,972 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) [2022-12-05 22:03:27,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-05 22:03:28,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 22:03:28,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:03:28,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-05 22:03:28,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:03:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:28,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:03:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:28,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112301744] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:03:28,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:03:28,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 16 [2022-12-05 22:03:28,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529789519] [2022-12-05 22:03:28,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:03:28,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 22:03:28,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:28,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 22:03:28,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-12-05 22:03:28,249 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:03:28,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 225 transitions, 3870 flow. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:03:28,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:28,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:03:28,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:29,070 INFO L130 PetriNetUnfolder]: 968/1988 cut-off events. [2022-12-05 22:03:29,070 INFO L131 PetriNetUnfolder]: For 110685/110685 co-relation queries the response was YES. [2022-12-05 22:03:29,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17816 conditions, 1988 events. 968/1988 cut-off events. For 110685/110685 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 13248 event pairs, 107 based on Foata normal form. 100/2088 useless extension candidates. Maximal degree in co-relation 15572. Up to 672 conditions per place. [2022-12-05 22:03:29,085 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 186 selfloop transitions, 171 changer transitions 47/404 dead transitions. [2022-12-05 22:03:29,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 404 transitions, 7092 flow [2022-12-05 22:03:29,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-05 22:03:29,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-05 22:03:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 162 transitions. [2022-12-05 22:03:29,086 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.46956521739130436 [2022-12-05 22:03:29,086 INFO L175 Difference]: Start difference. First operand has 155 places, 225 transitions, 3870 flow. Second operand 23 states and 162 transitions. [2022-12-05 22:03:29,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 404 transitions, 7092 flow [2022-12-05 22:03:29,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 404 transitions, 6807 flow, removed 116 selfloop flow, removed 6 redundant places. [2022-12-05 22:03:29,218 INFO L231 Difference]: Finished difference. Result has 184 places, 275 transitions, 5412 flow [2022-12-05 22:03:29,218 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=3689, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5412, PETRI_PLACES=184, PETRI_TRANSITIONS=275} [2022-12-05 22:03:29,219 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 164 predicate places. [2022-12-05 22:03:29,219 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 275 transitions, 5412 flow [2022-12-05 22:03:29,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:03:29,219 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:29,219 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:29,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-05 22:03:29,423 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,SelfDestructingSolverStorable12 [2022-12-05 22:03:29,423 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:29,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:29,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1310515272, now seen corresponding path program 11 times [2022-12-05 22:03:29,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:29,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366685736] [2022-12-05 22:03:29,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:29,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:29,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:29,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366685736] [2022-12-05 22:03:29,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366685736] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:03:29,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064904863] [2022-12-05 22:03:29,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 22:03:29,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:29,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:03:29,541 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) [2022-12-05 22:03:29,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-05 22:03:29,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 22:03:29,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:03:29,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 22:03:29,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:03:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:29,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:03:29,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:29,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064904863] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:03:29,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:03:29,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-12-05 22:03:29,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113760047] [2022-12-05 22:03:29,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:03:29,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-05 22:03:29,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:29,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-05 22:03:29,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-12-05 22:03:29,818 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:03:29,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 275 transitions, 5412 flow. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 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) [2022-12-05 22:03:29,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:29,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:03:29,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:30,690 INFO L130 PetriNetUnfolder]: 1241/2527 cut-off events. [2022-12-05 22:03:30,691 INFO L131 PetriNetUnfolder]: For 195921/195921 co-relation queries the response was YES. [2022-12-05 22:03:30,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26962 conditions, 2527 events. 1241/2527 cut-off events. For 195921/195921 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 17608 event pairs, 100 based on Foata normal form. 24/2551 useless extension candidates. Maximal degree in co-relation 22173. Up to 647 conditions per place. [2022-12-05 22:03:30,715 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 160 selfloop transitions, 280 changer transitions 56/496 dead transitions. [2022-12-05 22:03:30,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 496 transitions, 9615 flow [2022-12-05 22:03:30,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-05 22:03:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-05 22:03:30,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 151 transitions. [2022-12-05 22:03:30,716 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2022-12-05 22:03:30,716 INFO L175 Difference]: Start difference. First operand has 184 places, 275 transitions, 5412 flow. Second operand 24 states and 151 transitions. [2022-12-05 22:03:30,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 496 transitions, 9615 flow [2022-12-05 22:03:30,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 496 transitions, 9273 flow, removed 111 selfloop flow, removed 7 redundant places. [2022-12-05 22:03:30,997 INFO L231 Difference]: Finished difference. Result has 206 places, 340 transitions, 7557 flow [2022-12-05 22:03:30,997 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=5178, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7557, PETRI_PLACES=206, PETRI_TRANSITIONS=340} [2022-12-05 22:03:30,998 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 186 predicate places. [2022-12-05 22:03:30,998 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 340 transitions, 7557 flow [2022-12-05 22:03:30,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 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) [2022-12-05 22:03:30,998 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:30,998 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:31,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-05 22:03:31,199 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,SelfDestructingSolverStorable13 [2022-12-05 22:03:31,199 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:31,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:31,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1972490811, now seen corresponding path program 12 times [2022-12-05 22:03:31,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:31,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875138729] [2022-12-05 22:03:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:31,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:31,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:31,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:31,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875138729] [2022-12-05 22:03:31,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875138729] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:03:31,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285503670] [2022-12-05 22:03:31,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 22:03:31,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:31,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:03:31,366 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) [2022-12-05 22:03:31,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-05 22:03:31,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 22:03:31,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:03:31,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-05 22:03:31,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:03:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:31,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:03:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:31,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285503670] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:03:31,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:03:31,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 10 [2022-12-05 22:03:31,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584057303] [2022-12-05 22:03:31,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:03:31,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 22:03:31,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:31,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 22:03:31,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-12-05 22:03:31,593 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-05 22:03:31,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 340 transitions, 7557 flow. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:03:31,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:31,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-05 22:03:31,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:32,407 INFO L130 PetriNetUnfolder]: 1828/3674 cut-off events. [2022-12-05 22:03:32,407 INFO L131 PetriNetUnfolder]: For 297186/297186 co-relation queries the response was YES. [2022-12-05 22:03:32,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41674 conditions, 3674 events. 1828/3674 cut-off events. For 297186/297186 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 27258 event pairs, 250 based on Foata normal form. 2/3674 useless extension candidates. Maximal degree in co-relation 35031. Up to 1351 conditions per place. [2022-12-05 22:03:32,438 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 296 selfloop transitions, 249 changer transitions 43/591 dead transitions. [2022-12-05 22:03:32,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 591 transitions, 13562 flow [2022-12-05 22:03:32,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 22:03:32,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 22:03:32,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2022-12-05 22:03:32,439 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2022-12-05 22:03:32,439 INFO L175 Difference]: Start difference. First operand has 206 places, 340 transitions, 7557 flow. Second operand 7 states and 72 transitions. [2022-12-05 22:03:32,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 591 transitions, 13562 flow [2022-12-05 22:03:32,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 591 transitions, 13041 flow, removed 239 selfloop flow, removed 8 redundant places. [2022-12-05 22:03:32,918 INFO L231 Difference]: Finished difference. Result has 208 places, 470 transitions, 11453 flow [2022-12-05 22:03:32,918 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=7246, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11453, PETRI_PLACES=208, PETRI_TRANSITIONS=470} [2022-12-05 22:03:32,919 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 188 predicate places. [2022-12-05 22:03:32,919 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 470 transitions, 11453 flow [2022-12-05 22:03:32,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:03:32,919 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:32,919 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:32,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-05 22:03:33,123 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,SelfDestructingSolverStorable14 [2022-12-05 22:03:33,123 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:33,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:33,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1562783304, now seen corresponding path program 13 times [2022-12-05 22:03:33,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:33,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312856920] [2022-12-05 22:03:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:33,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:33,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:33,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312856920] [2022-12-05 22:03:33,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312856920] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:03:33,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343839965] [2022-12-05 22:03:33,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 22:03:33,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:33,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:03:33,225 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) [2022-12-05 22:03:33,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-05 22:03:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:33,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-05 22:03:33,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:03:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:33,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:03:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:33,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343839965] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:03:33,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:03:33,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-12-05 22:03:33,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689590498] [2022-12-05 22:03:33,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:03:33,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-05 22:03:33,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:33,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-05 22:03:33,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2022-12-05 22:03:33,565 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:03:33,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 470 transitions, 11453 flow. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 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) [2022-12-05 22:03:33,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:33,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:03:33,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:35,443 INFO L130 PetriNetUnfolder]: 2195/4495 cut-off events. [2022-12-05 22:03:35,443 INFO L131 PetriNetUnfolder]: For 395318/395318 co-relation queries the response was YES. [2022-12-05 22:03:35,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53536 conditions, 4495 events. 2195/4495 cut-off events. For 395318/395318 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 35237 event pairs, 52 based on Foata normal form. 24/4519 useless extension candidates. Maximal degree in co-relation 43248. Up to 1049 conditions per place. [2022-12-05 22:03:35,486 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 161 selfloop transitions, 546 changer transitions 29/736 dead transitions. [2022-12-05 22:03:35,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 736 transitions, 18320 flow [2022-12-05 22:03:35,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-05 22:03:35,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-05 22:03:35,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 190 transitions. [2022-12-05 22:03:35,487 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.34234234234234234 [2022-12-05 22:03:35,488 INFO L175 Difference]: Start difference. First operand has 208 places, 470 transitions, 11453 flow. Second operand 37 states and 190 transitions. [2022-12-05 22:03:35,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 736 transitions, 18320 flow [2022-12-05 22:03:36,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 736 transitions, 18106 flow, removed 98 selfloop flow, removed 2 redundant places. [2022-12-05 22:03:36,270 INFO L231 Difference]: Finished difference. Result has 247 places, 600 transitions, 16256 flow [2022-12-05 22:03:36,271 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=11296, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=16256, PETRI_PLACES=247, PETRI_TRANSITIONS=600} [2022-12-05 22:03:36,271 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2022-12-05 22:03:36,271 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 600 transitions, 16256 flow [2022-12-05 22:03:36,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 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) [2022-12-05 22:03:36,271 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:36,271 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:36,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-05 22:03:36,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:36,475 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:36,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:36,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1491050460, now seen corresponding path program 14 times [2022-12-05 22:03:36,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:36,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056885413] [2022-12-05 22:03:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:36,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:36,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:36,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056885413] [2022-12-05 22:03:36,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056885413] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:03:36,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596378480] [2022-12-05 22:03:36,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 22:03:36,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:36,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:03:36,588 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) [2022-12-05 22:03:36,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-05 22:03:36,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:03:36,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:03:36,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 22:03:36,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:03:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:36,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:03:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:36,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596378480] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:03:36,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:03:36,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-12-05 22:03:36,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935257325] [2022-12-05 22:03:36,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:03:36,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-05 22:03:36,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:36,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-05 22:03:36,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-12-05 22:03:36,862 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:03:36,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 600 transitions, 16256 flow. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:03:36,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:36,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:03:36,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:38,631 INFO L130 PetriNetUnfolder]: 2308/4660 cut-off events. [2022-12-05 22:03:38,631 INFO L131 PetriNetUnfolder]: For 514304/514304 co-relation queries the response was YES. [2022-12-05 22:03:38,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59187 conditions, 4660 events. 2308/4660 cut-off events. For 514304/514304 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 36211 event pairs, 135 based on Foata normal form. 68/4728 useless extension candidates. Maximal degree in co-relation 48146. Up to 1816 conditions per place. [2022-12-05 22:03:38,679 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 206 selfloop transitions, 542 changer transitions 15/763 dead transitions. [2022-12-05 22:03:38,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 763 transitions, 20634 flow [2022-12-05 22:03:38,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-05 22:03:38,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-05 22:03:38,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 149 transitions. [2022-12-05 22:03:38,681 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.382051282051282 [2022-12-05 22:03:38,681 INFO L175 Difference]: Start difference. First operand has 247 places, 600 transitions, 16256 flow. Second operand 26 states and 149 transitions. [2022-12-05 22:03:38,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 763 transitions, 20634 flow [2022-12-05 22:03:40,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 763 transitions, 19212 flow, removed 669 selfloop flow, removed 7 redundant places. [2022-12-05 22:03:40,086 INFO L231 Difference]: Finished difference. Result has 268 places, 654 transitions, 18453 flow [2022-12-05 22:03:40,087 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=15133, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=483, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=18453, PETRI_PLACES=268, PETRI_TRANSITIONS=654} [2022-12-05 22:03:40,087 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 248 predicate places. [2022-12-05 22:03:40,087 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 654 transitions, 18453 flow [2022-12-05 22:03:40,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:03:40,087 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:40,087 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:40,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-05 22:03:40,291 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,SelfDestructingSolverStorable16 [2022-12-05 22:03:40,291 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:40,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:40,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1217733560, now seen corresponding path program 15 times [2022-12-05 22:03:40,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:40,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565118873] [2022-12-05 22:03:40,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:40,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:40,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:40,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565118873] [2022-12-05 22:03:40,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565118873] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:03:40,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134963880] [2022-12-05 22:03:40,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 22:03:40,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:40,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:03:40,408 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) [2022-12-05 22:03:40,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-05 22:03:40,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 22:03:40,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:03:40,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 22:03:40,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:03:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:40,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:03:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:40,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134963880] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:03:40,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:03:40,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-12-05 22:03:40,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295571164] [2022-12-05 22:03:40,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:03:40,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-05 22:03:40,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:40,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-05 22:03:40,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-12-05 22:03:40,716 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:03:40,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 654 transitions, 18453 flow. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:03:40,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:40,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:03:40,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:42,724 INFO L130 PetriNetUnfolder]: 2350/4717 cut-off events. [2022-12-05 22:03:42,725 INFO L131 PetriNetUnfolder]: For 524812/524812 co-relation queries the response was YES. [2022-12-05 22:03:42,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60029 conditions, 4717 events. 2350/4717 cut-off events. For 524812/524812 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 36719 event pairs, 13 based on Foata normal form. 70/4787 useless extension candidates. Maximal degree in co-relation 55394. Up to 976 conditions per place. [2022-12-05 22:03:42,774 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 218 selfloop transitions, 605 changer transitions 13/836 dead transitions. [2022-12-05 22:03:42,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 836 transitions, 23125 flow [2022-12-05 22:03:42,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-05 22:03:42,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-05 22:03:42,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 174 transitions. [2022-12-05 22:03:42,788 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3625 [2022-12-05 22:03:42,788 INFO L175 Difference]: Start difference. First operand has 268 places, 654 transitions, 18453 flow. Second operand 32 states and 174 transitions. [2022-12-05 22:03:42,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 836 transitions, 23125 flow [2022-12-05 22:03:44,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 836 transitions, 22961 flow, removed 66 selfloop flow, removed 6 redundant places. [2022-12-05 22:03:44,147 INFO L231 Difference]: Finished difference. Result has 294 places, 711 transitions, 21373 flow [2022-12-05 22:03:44,147 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=18261, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=543, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=21373, PETRI_PLACES=294, PETRI_TRANSITIONS=711} [2022-12-05 22:03:44,148 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 274 predicate places. [2022-12-05 22:03:44,148 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 711 transitions, 21373 flow [2022-12-05 22:03:44,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:03:44,148 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:44,148 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:44,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-05 22:03:44,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-05 22:03:44,353 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:44,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:44,353 INFO L85 PathProgramCache]: Analyzing trace with hash -91435464, now seen corresponding path program 16 times [2022-12-05 22:03:44,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:44,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092647526] [2022-12-05 22:03:44,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:44,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:44,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:44,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092647526] [2022-12-05 22:03:44,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092647526] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:03:44,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176783184] [2022-12-05 22:03:44,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 22:03:44,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:44,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:03:44,460 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) [2022-12-05 22:03:44,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-05 22:03:44,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 22:03:44,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:03:44,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 22:03:44,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:03:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:44,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:03:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:44,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176783184] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:03:44,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:03:44,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-12-05 22:03:44,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759100194] [2022-12-05 22:03:44,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:03:44,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-05 22:03:44,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:44,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-05 22:03:44,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-12-05 22:03:44,847 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:03:44,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 711 transitions, 21373 flow. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 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) [2022-12-05 22:03:44,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:44,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:03:44,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:47,111 INFO L130 PetriNetUnfolder]: 2835/5630 cut-off events. [2022-12-05 22:03:47,112 INFO L131 PetriNetUnfolder]: For 593902/593902 co-relation queries the response was YES. [2022-12-05 22:03:47,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72110 conditions, 5630 events. 2835/5630 cut-off events. For 593902/593902 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 44764 event pairs, 251 based on Foata normal form. 56/5686 useless extension candidates. Maximal degree in co-relation 67898. Up to 3999 conditions per place. [2022-12-05 22:03:47,174 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 665 selfloop transitions, 328 changer transitions 13/1006 dead transitions. [2022-12-05 22:03:47,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 1006 transitions, 29809 flow [2022-12-05 22:03:47,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-05 22:03:47,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-05 22:03:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 154 transitions. [2022-12-05 22:03:47,175 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2022-12-05 22:03:47,175 INFO L175 Difference]: Start difference. First operand has 294 places, 711 transitions, 21373 flow. Second operand 28 states and 154 transitions. [2022-12-05 22:03:47,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 1006 transitions, 29809 flow [2022-12-05 22:03:49,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 1006 transitions, 27992 flow, removed 345 selfloop flow, removed 19 redundant places. [2022-12-05 22:03:49,333 INFO L231 Difference]: Finished difference. Result has 312 places, 868 transitions, 25527 flow [2022-12-05 22:03:49,334 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=19922, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=25527, PETRI_PLACES=312, PETRI_TRANSITIONS=868} [2022-12-05 22:03:49,334 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 292 predicate places. [2022-12-05 22:03:49,334 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 868 transitions, 25527 flow [2022-12-05 22:03:49,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 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) [2022-12-05 22:03:49,334 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:49,334 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:49,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-05 22:03:49,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:49,540 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:49,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:49,540 INFO L85 PathProgramCache]: Analyzing trace with hash -907542364, now seen corresponding path program 17 times [2022-12-05 22:03:49,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:49,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847639943] [2022-12-05 22:03:49,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:49,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:49,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:49,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847639943] [2022-12-05 22:03:49,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847639943] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:03:49,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672778183] [2022-12-05 22:03:49,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 22:03:49,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:49,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:03:49,665 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) [2022-12-05 22:03:49,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-05 22:03:49,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 22:03:49,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:03:49,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 22:03:49,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:03:49,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:49,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:03:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:49,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672778183] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:03:49,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:03:49,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-12-05 22:03:49,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549978486] [2022-12-05 22:03:49,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:03:49,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-05 22:03:49,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:49,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-05 22:03:49,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-12-05 22:03:49,914 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:03:49,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 868 transitions, 25527 flow. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 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) [2022-12-05 22:03:49,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:49,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:03:49,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:52,718 INFO L130 PetriNetUnfolder]: 3296/6550 cut-off events. [2022-12-05 22:03:52,718 INFO L131 PetriNetUnfolder]: For 349346/349346 co-relation queries the response was YES. [2022-12-05 22:03:52,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73737 conditions, 6550 events. 3296/6550 cut-off events. For 349346/349346 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 53493 event pairs, 161 based on Foata normal form. 118/6668 useless extension candidates. Maximal degree in co-relation 72037. Up to 2208 conditions per place. [2022-12-05 22:03:52,777 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 319 selfloop transitions, 821 changer transitions 15/1155 dead transitions. [2022-12-05 22:03:52,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1155 transitions, 34264 flow [2022-12-05 22:03:52,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-05 22:03:52,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-05 22:03:52,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 169 transitions. [2022-12-05 22:03:52,778 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3634408602150538 [2022-12-05 22:03:52,778 INFO L175 Difference]: Start difference. First operand has 312 places, 868 transitions, 25527 flow. Second operand 31 states and 169 transitions. [2022-12-05 22:03:52,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1155 transitions, 34264 flow [2022-12-05 22:03:54,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 1155 transitions, 33844 flow, removed 180 selfloop flow, removed 8 redundant places. [2022-12-05 22:03:54,717 INFO L231 Difference]: Finished difference. Result has 343 places, 1026 transitions, 32439 flow [2022-12-05 22:03:54,719 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=25120, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=669, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=32439, PETRI_PLACES=343, PETRI_TRANSITIONS=1026} [2022-12-05 22:03:54,719 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 323 predicate places. [2022-12-05 22:03:54,719 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 1026 transitions, 32439 flow [2022-12-05 22:03:54,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 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) [2022-12-05 22:03:54,720 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:03:54,720 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:03:54,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-05 22:03:54,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:54,928 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:03:54,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:03:54,929 INFO L85 PathProgramCache]: Analyzing trace with hash -592615284, now seen corresponding path program 18 times [2022-12-05 22:03:54,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:03:54,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25322973] [2022-12-05 22:03:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:03:54,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:03:54,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:03:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:55,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:03:55,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25322973] [2022-12-05 22:03:55,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25322973] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:03:55,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029876596] [2022-12-05 22:03:55,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 22:03:55,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:03:55,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:03:55,147 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) [2022-12-05 22:03:55,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-05 22:03:55,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-05 22:03:55,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:03:55,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-05 22:03:55,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:03:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:55,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:03:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:03:55,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029876596] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:03:55,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:03:55,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-12-05 22:03:55,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853384238] [2022-12-05 22:03:55,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:03:55,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-05 22:03:55,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:03:55,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-05 22:03:55,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-12-05 22:03:55,423 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:03:55,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 1026 transitions, 32439 flow. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:03:55,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:03:55,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:03:55,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:03:58,455 INFO L130 PetriNetUnfolder]: 3692/7399 cut-off events. [2022-12-05 22:03:58,455 INFO L131 PetriNetUnfolder]: For 458693/458693 co-relation queries the response was YES. [2022-12-05 22:03:58,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89511 conditions, 7399 events. 3692/7399 cut-off events. For 458693/458693 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 62246 event pairs, 83 based on Foata normal form. 42/7441 useless extension candidates. Maximal degree in co-relation 86624. Up to 2094 conditions per place. [2022-12-05 22:03:58,538 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 747 selfloop transitions, 497 changer transitions 4/1248 dead transitions. [2022-12-05 22:03:58,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 1248 transitions, 39887 flow [2022-12-05 22:03:58,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-05 22:03:58,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-05 22:03:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 169 transitions. [2022-12-05 22:03:58,540 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.35208333333333336 [2022-12-05 22:03:58,540 INFO L175 Difference]: Start difference. First operand has 343 places, 1026 transitions, 32439 flow. Second operand 32 states and 169 transitions. [2022-12-05 22:03:58,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 1248 transitions, 39887 flow [2022-12-05 22:04:01,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1248 transitions, 39335 flow, removed 228 selfloop flow, removed 14 redundant places. [2022-12-05 22:04:01,513 INFO L231 Difference]: Finished difference. Result has 375 places, 1137 transitions, 36949 flow [2022-12-05 22:04:01,514 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=31887, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1026, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=36949, PETRI_PLACES=375, PETRI_TRANSITIONS=1137} [2022-12-05 22:04:01,514 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 355 predicate places. [2022-12-05 22:04:01,514 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 1137 transitions, 36949 flow [2022-12-05 22:04:01,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:04:01,514 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:04:01,514 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:04:01,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-05 22:04:01,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:04:01,719 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:04:01,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:04:01,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1833748816, now seen corresponding path program 19 times [2022-12-05 22:04:01,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:04:01,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330787619] [2022-12-05 22:04:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:04:01,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:04:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:04:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:04:01,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:04:01,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330787619] [2022-12-05 22:04:01,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330787619] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:04:01,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491256787] [2022-12-05 22:04:01,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 22:04:01,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:04:01,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:04:01,850 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) [2022-12-05 22:04:01,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-05 22:04:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:04:01,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 22:04:01,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:04:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:04:02,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:04:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:04:02,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491256787] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:04:02,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:04:02,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-12-05 22:04:02,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645876800] [2022-12-05 22:04:02,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:04:02,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-05 22:04:02,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:04:02,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-05 22:04:02,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-12-05 22:04:02,163 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:04:02,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 1137 transitions, 36949 flow. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 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) [2022-12-05 22:04:02,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:04:02,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:04:02,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:04:05,627 INFO L130 PetriNetUnfolder]: 3624/7193 cut-off events. [2022-12-05 22:04:05,627 INFO L131 PetriNetUnfolder]: For 574482/574482 co-relation queries the response was YES. [2022-12-05 22:04:05,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89576 conditions, 7193 events. 3624/7193 cut-off events. For 574482/574482 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 59651 event pairs, 379 based on Foata normal form. 268/7461 useless extension candidates. Maximal degree in co-relation 89129. Up to 5760 conditions per place. [2022-12-05 22:04:05,710 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 992 selfloop transitions, 242 changer transitions 37/1271 dead transitions. [2022-12-05 22:04:05,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 1271 transitions, 41806 flow [2022-12-05 22:04:05,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-05 22:04:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-05 22:04:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 159 transitions. [2022-12-05 22:04:05,711 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2022-12-05 22:04:05,711 INFO L175 Difference]: Start difference. First operand has 375 places, 1137 transitions, 36949 flow. Second operand 28 states and 159 transitions. [2022-12-05 22:04:05,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 1271 transitions, 41806 flow [2022-12-05 22:04:09,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 1271 transitions, 40644 flow, removed 531 selfloop flow, removed 13 redundant places. [2022-12-05 22:04:09,360 INFO L231 Difference]: Finished difference. Result has 394 places, 1144 transitions, 37070 flow [2022-12-05 22:04:09,361 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=35632, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=917, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=37070, PETRI_PLACES=394, PETRI_TRANSITIONS=1144} [2022-12-05 22:04:09,361 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 374 predicate places. [2022-12-05 22:04:09,362 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 1144 transitions, 37070 flow [2022-12-05 22:04:09,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 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) [2022-12-05 22:04:09,362 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:04:09,362 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:04:09,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-05 22:04:09,564 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,SelfDestructingSolverStorable21 [2022-12-05 22:04:09,564 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:04:09,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:04:09,565 INFO L85 PathProgramCache]: Analyzing trace with hash 78628759, now seen corresponding path program 20 times [2022-12-05 22:04:09,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:04:09,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123781711] [2022-12-05 22:04:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:04:09,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:04:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:04:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:04:09,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:04:09,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123781711] [2022-12-05 22:04:09,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123781711] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:04:09,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620083913] [2022-12-05 22:04:09,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 22:04:09,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:04:09,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:04:09,705 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) [2022-12-05 22:04:09,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-05 22:04:09,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:04:09,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:04:09,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-05 22:04:09,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:04:09,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:04:09,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:04:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:04:10,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620083913] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:04:10,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:04:10,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-12-05 22:04:10,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614931852] [2022-12-05 22:04:10,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:04:10,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-05 22:04:10,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:04:10,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-05 22:04:10,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2022-12-05 22:04:10,079 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:04:10,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1144 transitions, 37070 flow. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 26 states have internal predecessors, (41), 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) [2022-12-05 22:04:10,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:04:10,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:04:10,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:04:13,960 INFO L130 PetriNetUnfolder]: 3870/7760 cut-off events. [2022-12-05 22:04:13,961 INFO L131 PetriNetUnfolder]: For 592557/592557 co-relation queries the response was YES. [2022-12-05 22:04:14,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96597 conditions, 7760 events. 3870/7760 cut-off events. For 592557/592557 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 65643 event pairs, 413 based on Foata normal form. 138/7898 useless extension candidates. Maximal degree in co-relation 96138. Up to 5896 conditions per place. [2022-12-05 22:04:14,056 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 1022 selfloop transitions, 301 changer transitions 13/1336 dead transitions. [2022-12-05 22:04:14,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 1336 transitions, 44517 flow [2022-12-05 22:04:14,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-05 22:04:14,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-05 22:04:14,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 128 transitions. [2022-12-05 22:04:14,058 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3710144927536232 [2022-12-05 22:04:14,058 INFO L175 Difference]: Start difference. First operand has 394 places, 1144 transitions, 37070 flow. Second operand 23 states and 128 transitions. [2022-12-05 22:04:14,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 1336 transitions, 44517 flow [2022-12-05 22:04:18,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 1336 transitions, 44163 flow, removed 125 selfloop flow, removed 14 redundant places. [2022-12-05 22:04:18,181 INFO L231 Difference]: Finished difference. Result has 408 places, 1240 transitions, 41258 flow [2022-12-05 22:04:18,181 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=36737, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=885, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=41258, PETRI_PLACES=408, PETRI_TRANSITIONS=1240} [2022-12-05 22:04:18,182 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 388 predicate places. [2022-12-05 22:04:18,182 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 1240 transitions, 41258 flow [2022-12-05 22:04:18,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 26 states have internal predecessors, (41), 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) [2022-12-05 22:04:18,182 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:04:18,182 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:04:18,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-05 22:04:18,387 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,SelfDestructingSolverStorable22 [2022-12-05 22:04:18,387 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:04:18,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:04:18,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1842568799, now seen corresponding path program 21 times [2022-12-05 22:04:18,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:04:18,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084797176] [2022-12-05 22:04:18,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:04:18,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:04:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:04:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:04:18,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:04:18,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084797176] [2022-12-05 22:04:18,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084797176] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:04:18,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960138767] [2022-12-05 22:04:18,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 22:04:18,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:04:18,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:04:18,452 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) [2022-12-05 22:04:18,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-05 22:04:18,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-05 22:04:18,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:04:18,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-05 22:04:18,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:04:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:04:18,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:04:18,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:04:18,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960138767] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:04:18,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:04:18,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-12-05 22:04:18,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583082062] [2022-12-05 22:04:18,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:04:18,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 22:04:18,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:04:18,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 22:04:18,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-05 22:04:18,580 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-05 22:04:18,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 1240 transitions, 41258 flow. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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) [2022-12-05 22:04:18,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:04:18,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-05 22:04:18,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:04:22,196 INFO L130 PetriNetUnfolder]: 3927/7863 cut-off events. [2022-12-05 22:04:22,196 INFO L131 PetriNetUnfolder]: For 587136/587136 co-relation queries the response was YES. [2022-12-05 22:04:22,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99770 conditions, 7863 events. 3927/7863 cut-off events. For 587136/587136 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 66567 event pairs, 486 based on Foata normal form. 44/7907 useless extension candidates. Maximal degree in co-relation 97386. Up to 5878 conditions per place. [2022-12-05 22:04:22,410 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 1012 selfloop transitions, 307 changer transitions 50/1372 dead transitions. [2022-12-05 22:04:22,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 1372 transitions, 46697 flow [2022-12-05 22:04:22,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 22:04:22,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 22:04:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2022-12-05 22:04:22,411 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2022-12-05 22:04:22,411 INFO L175 Difference]: Start difference. First operand has 408 places, 1240 transitions, 41258 flow. Second operand 9 states and 86 transitions. [2022-12-05 22:04:22,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 1372 transitions, 46697 flow [2022-12-05 22:04:26,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 1372 transitions, 46326 flow, removed 110 selfloop flow, removed 14 redundant places. [2022-12-05 22:04:26,711 INFO L231 Difference]: Finished difference. Result has 407 places, 1269 transitions, 42960 flow [2022-12-05 22:04:26,712 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=40885, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=948, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=42960, PETRI_PLACES=407, PETRI_TRANSITIONS=1269} [2022-12-05 22:04:26,713 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 387 predicate places. [2022-12-05 22:04:26,713 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 1269 transitions, 42960 flow [2022-12-05 22:04:26,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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) [2022-12-05 22:04:26,713 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:04:26,713 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:04:26,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-05 22:04:26,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:04:26,927 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:04:26,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:04:26,927 INFO L85 PathProgramCache]: Analyzing trace with hash 219187121, now seen corresponding path program 22 times [2022-12-05 22:04:26,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:04:26,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649269450] [2022-12-05 22:04:26,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:04:26,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:04:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:04:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:04:27,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:04:27,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649269450] [2022-12-05 22:04:27,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649269450] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:04:27,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857949930] [2022-12-05 22:04:27,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 22:04:27,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:04:27,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:04:27,093 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:04:27,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-05 22:04:27,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 22:04:27,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:04:27,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-05 22:04:27,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:04:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:04:27,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:04:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:04:27,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857949930] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:04:27,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:04:27,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2022-12-05 22:04:27,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564873013] [2022-12-05 22:04:27,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:04:27,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-05 22:04:27,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:04:27,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-05 22:04:27,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-12-05 22:04:27,481 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:04:27,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 1269 transitions, 42960 flow. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:04:27,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:04:27,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:04:27,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:04:33,332 INFO L130 PetriNetUnfolder]: 4769/9596 cut-off events. [2022-12-05 22:04:33,332 INFO L131 PetriNetUnfolder]: For 714174/714174 co-relation queries the response was YES. [2022-12-05 22:04:33,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121702 conditions, 9596 events. 4769/9596 cut-off events. For 714174/714174 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 84264 event pairs, 103 based on Foata normal form. 90/9686 useless extension candidates. Maximal degree in co-relation 117406. Up to 4125 conditions per place. [2022-12-05 22:04:33,442 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 952 selfloop transitions, 755 changer transitions 21/1728 dead transitions. [2022-12-05 22:04:33,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 1728 transitions, 58078 flow [2022-12-05 22:04:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-05 22:04:33,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-12-05 22:04:33,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 214 transitions. [2022-12-05 22:04:33,463 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.37543859649122807 [2022-12-05 22:04:33,463 INFO L175 Difference]: Start difference. First operand has 407 places, 1269 transitions, 42960 flow. Second operand 38 states and 214 transitions. [2022-12-05 22:04:33,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 1728 transitions, 58078 flow [2022-12-05 22:04:39,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1728 transitions, 57361 flow, removed 72 selfloop flow, removed 4 redundant places. [2022-12-05 22:04:39,177 INFO L231 Difference]: Finished difference. Result has 448 places, 1505 transitions, 53408 flow [2022-12-05 22:04:39,178 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=42285, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=537, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=53408, PETRI_PLACES=448, PETRI_TRANSITIONS=1505} [2022-12-05 22:04:39,178 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 428 predicate places. [2022-12-05 22:04:39,178 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 1505 transitions, 53408 flow [2022-12-05 22:04:39,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:04:39,179 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:04:39,179 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:04:39,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-05 22:04:39,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:04:39,382 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:04:39,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:04:39,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1102585955, now seen corresponding path program 23 times [2022-12-05 22:04:39,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:04:39,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251570881] [2022-12-05 22:04:39,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:04:39,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:04:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:04:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:04:39,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:04:39,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251570881] [2022-12-05 22:04:39,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251570881] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:04:39,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149451253] [2022-12-05 22:04:39,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 22:04:39,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:04:39,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:04:39,571 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:04:39,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-05 22:04:39,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 22:04:39,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:04:39,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-05 22:04:39,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:04:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:04:39,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:04:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:04:39,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149451253] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:04:39,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:04:39,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-12-05 22:04:39,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812622599] [2022-12-05 22:04:39,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:04:39,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-05 22:04:39,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:04:39,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-05 22:04:39,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-12-05 22:04:39,949 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:04:39,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 1505 transitions, 53408 flow. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 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) [2022-12-05 22:04:39,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:04:39,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:04:39,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:04:46,372 INFO L130 PetriNetUnfolder]: 4989/9995 cut-off events. [2022-12-05 22:04:46,372 INFO L131 PetriNetUnfolder]: For 874323/874323 co-relation queries the response was YES. [2022-12-05 22:04:46,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129334 conditions, 9995 events. 4989/9995 cut-off events. For 874323/874323 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 87948 event pairs, 295 based on Foata normal form. 260/10255 useless extension candidates. Maximal degree in co-relation 126176. Up to 3036 conditions per place. [2022-12-05 22:04:46,503 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 647 selfloop transitions, 1116 changer transitions 53/1816 dead transitions. [2022-12-05 22:04:46,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 1816 transitions, 64261 flow [2022-12-05 22:04:46,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-05 22:04:46,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-12-05 22:04:46,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 216 transitions. [2022-12-05 22:04:46,505 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.37894736842105264 [2022-12-05 22:04:46,505 INFO L175 Difference]: Start difference. First operand has 448 places, 1505 transitions, 53408 flow. Second operand 38 states and 216 transitions. [2022-12-05 22:04:46,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 1816 transitions, 64261 flow [2022-12-05 22:04:53,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 1816 transitions, 63518 flow, removed 314 selfloop flow, removed 13 redundant places. [2022-12-05 22:04:53,785 INFO L231 Difference]: Finished difference. Result has 478 places, 1608 transitions, 59295 flow [2022-12-05 22:04:53,786 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=52519, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=995, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=59295, PETRI_PLACES=478, PETRI_TRANSITIONS=1608} [2022-12-05 22:04:53,787 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 458 predicate places. [2022-12-05 22:04:53,787 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 1608 transitions, 59295 flow [2022-12-05 22:04:53,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 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) [2022-12-05 22:04:53,787 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:04:53,787 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:04:53,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-05 22:04:54,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-05 22:04:54,003 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:04:54,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:04:54,004 INFO L85 PathProgramCache]: Analyzing trace with hash 145823757, now seen corresponding path program 24 times [2022-12-05 22:04:54,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:04:54,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310014262] [2022-12-05 22:04:54,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:04:54,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:04:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:04:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:04:54,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:04:54,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310014262] [2022-12-05 22:04:54,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310014262] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:04:54,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660793553] [2022-12-05 22:04:54,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 22:04:54,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:04:54,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:04:54,116 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:04:54,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-05 22:04:54,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-05 22:04:54,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:04:54,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-05 22:04:54,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:04:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:04:54,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:04:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:04:54,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660793553] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:04:54,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:04:54,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-12-05 22:04:54,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697930179] [2022-12-05 22:04:54,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:04:54,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-05 22:04:54,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:04:54,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-05 22:04:54,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2022-12-05 22:04:54,453 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:04:54,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 1608 transitions, 59295 flow. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 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) [2022-12-05 22:04:54,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:04:54,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:04:54,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:05:01,170 INFO L130 PetriNetUnfolder]: 4914/9830 cut-off events. [2022-12-05 22:05:01,170 INFO L131 PetriNetUnfolder]: For 720297/720297 co-relation queries the response was YES. [2022-12-05 22:05:01,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130681 conditions, 9830 events. 4914/9830 cut-off events. For 720297/720297 co-relation queries the response was YES. Maximal size of possible extension queue 799. Compared 86361 event pairs, 67 based on Foata normal form. 12/9842 useless extension candidates. Maximal degree in co-relation 126355. Up to 2853 conditions per place. [2022-12-05 22:05:01,468 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 1001 selfloop transitions, 698 changer transitions 16/1715 dead transitions. [2022-12-05 22:05:01,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 1715 transitions, 65170 flow [2022-12-05 22:05:01,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-05 22:05:01,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-05 22:05:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 121 transitions. [2022-12-05 22:05:01,470 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.33611111111111114 [2022-12-05 22:05:01,470 INFO L175 Difference]: Start difference. First operand has 478 places, 1608 transitions, 59295 flow. Second operand 24 states and 121 transitions. [2022-12-05 22:05:01,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 1715 transitions, 65170 flow [2022-12-05 22:05:08,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 1715 transitions, 63946 flow, removed 216 selfloop flow, removed 19 redundant places. [2022-12-05 22:05:08,332 INFO L231 Difference]: Finished difference. Result has 484 places, 1622 transitions, 60214 flow [2022-12-05 22:05:08,334 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=57699, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=674, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=922, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=60214, PETRI_PLACES=484, PETRI_TRANSITIONS=1622} [2022-12-05 22:05:08,334 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 464 predicate places. [2022-12-05 22:05:08,334 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 1622 transitions, 60214 flow [2022-12-05 22:05:08,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 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) [2022-12-05 22:05:08,334 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:05:08,334 INFO L213 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:05:08,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-05 22:05:08,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-05 22:05:08,539 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:05:08,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:05:08,539 INFO L85 PathProgramCache]: Analyzing trace with hash 93885727, now seen corresponding path program 25 times [2022-12-05 22:05:08,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:05:08,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134267652] [2022-12-05 22:05:08,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:05:08,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:05:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:05:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:05:08,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:05:08,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134267652] [2022-12-05 22:05:08,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134267652] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:05:08,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424189487] [2022-12-05 22:05:08,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 22:05:08,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:05:08,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:05:08,676 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:05:08,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-05 22:05:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:05:08,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-05 22:05:08,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:05:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:05:08,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:05:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:05:09,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424189487] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:05:09,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:05:09,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-12-05 22:05:09,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388196499] [2022-12-05 22:05:09,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:05:09,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-05 22:05:09,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:05:09,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-05 22:05:09,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2022-12-05 22:05:09,076 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:05:09,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 1622 transitions, 60214 flow. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:05:09,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:05:09,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:05:09,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:05:18,977 INFO L130 PetriNetUnfolder]: 6630/13236 cut-off events. [2022-12-05 22:05:18,978 INFO L131 PetriNetUnfolder]: For 1297876/1297876 co-relation queries the response was YES. [2022-12-05 22:05:19,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178584 conditions, 13236 events. 6630/13236 cut-off events. For 1297876/1297876 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 120902 event pairs, 255 based on Foata normal form. 504/13740 useless extension candidates. Maximal degree in co-relation 172367. Up to 3135 conditions per place. [2022-12-05 22:05:19,157 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 493 selfloop transitions, 2006 changer transitions 127/2626 dead transitions. [2022-12-05 22:05:19,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 2626 transitions, 92267 flow [2022-12-05 22:05:19,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-05 22:05:19,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-12-05 22:05:19,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 437 transitions. [2022-12-05 22:05:19,160 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4103286384976526 [2022-12-05 22:05:19,160 INFO L175 Difference]: Start difference. First operand has 484 places, 1622 transitions, 60214 flow. Second operand 71 states and 437 transitions. [2022-12-05 22:05:19,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 2626 transitions, 92267 flow [2022-12-05 22:05:30,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 2626 transitions, 89752 flow, removed 332 selfloop flow, removed 10 redundant places. [2022-12-05 22:05:30,846 INFO L231 Difference]: Finished difference. Result has 566 places, 2161 transitions, 84018 flow [2022-12-05 22:05:30,847 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=58204, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=84018, PETRI_PLACES=566, PETRI_TRANSITIONS=2161} [2022-12-05 22:05:30,852 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 546 predicate places. [2022-12-05 22:05:30,852 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 2161 transitions, 84018 flow [2022-12-05 22:05:30,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:05:30,852 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:05:30,852 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:05:30,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-05 22:05:31,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-05 22:05:31,056 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:05:31,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:05:31,057 INFO L85 PathProgramCache]: Analyzing trace with hash 140202930, now seen corresponding path program 26 times [2022-12-05 22:05:31,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:05:31,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755403805] [2022-12-05 22:05:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:05:31,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:05:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:05:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:05:31,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:05:31,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755403805] [2022-12-05 22:05:31,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755403805] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:05:31,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254920795] [2022-12-05 22:05:31,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 22:05:31,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:05:31,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:05:31,175 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:05:31,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-05 22:05:31,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:05:31,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:05:31,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-05 22:05:31,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:05:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:05:31,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:05:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:05:31,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254920795] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:05:31,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:05:31,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9] total 13 [2022-12-05 22:05:31,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214642698] [2022-12-05 22:05:31,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:05:31,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 22:05:31,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:05:31,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 22:05:31,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-12-05 22:05:31,482 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 22:05:31,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 2161 transitions, 84018 flow. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 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) [2022-12-05 22:05:31,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:05:31,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 22:05:31,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:05:47,099 INFO L130 PetriNetUnfolder]: 9505/18796 cut-off events. [2022-12-05 22:05:47,099 INFO L131 PetriNetUnfolder]: For 1924118/1924122 co-relation queries the response was YES. [2022-12-05 22:05:47,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273992 conditions, 18796 events. 9505/18796 cut-off events. For 1924118/1924122 co-relation queries the response was YES. Maximal size of possible extension queue 1389. Compared 179111 event pairs, 955 based on Foata normal form. 9/18798 useless extension candidates. Maximal degree in co-relation 264112. Up to 7838 conditions per place. [2022-12-05 22:05:47,354 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 1531 selfloop transitions, 1642 changer transitions 132/3316 dead transitions. [2022-12-05 22:05:47,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 3316 transitions, 130597 flow [2022-12-05 22:05:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 22:05:47,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 22:05:47,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2022-12-05 22:05:47,355 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.780952380952381 [2022-12-05 22:05:47,355 INFO L175 Difference]: Start difference. First operand has 566 places, 2161 transitions, 84018 flow. Second operand 7 states and 82 transitions. [2022-12-05 22:05:47,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 3316 transitions, 130597 flow [2022-12-05 22:06:11,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 3316 transitions, 122498 flow, removed 2670 selfloop flow, removed 22 redundant places. [2022-12-05 22:06:12,003 INFO L231 Difference]: Finished difference. Result has 554 places, 2988 transitions, 116967 flow [2022-12-05 22:06:12,005 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=78795, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=815, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=116967, PETRI_PLACES=554, PETRI_TRANSITIONS=2988} [2022-12-05 22:06:12,005 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 534 predicate places. [2022-12-05 22:06:12,005 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 2988 transitions, 116967 flow [2022-12-05 22:06:12,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 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) [2022-12-05 22:06:12,006 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:06:12,006 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:06:12,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-05 22:06:12,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-05 22:06:12,208 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:06:12,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:06:12,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1944851619, now seen corresponding path program 27 times [2022-12-05 22:06:12,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:06:12,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980630899] [2022-12-05 22:06:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:06:12,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:06:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:06:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:06:12,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:06:12,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980630899] [2022-12-05 22:06:12,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980630899] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:06:12,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768143477] [2022-12-05 22:06:12,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 22:06:12,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:06:12,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:06:12,358 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:06:12,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-05 22:06:12,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-05 22:06:12,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:06:12,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 22:06:12,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:06:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:06:12,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:06:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:06:12,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768143477] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:06:12,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:06:12,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-12-05 22:06:12,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878172547] [2022-12-05 22:06:12,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:06:12,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-05 22:06:12,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:06:12,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-05 22:06:12,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2022-12-05 22:06:12,756 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:06:12,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 2988 transitions, 116967 flow. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 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) [2022-12-05 22:06:12,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:06:12,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:06:12,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:06:37,309 INFO L130 PetriNetUnfolder]: 10206/20102 cut-off events. [2022-12-05 22:06:37,309 INFO L131 PetriNetUnfolder]: For 2056898/2056898 co-relation queries the response was YES. [2022-12-05 22:06:37,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292109 conditions, 20102 events. 10206/20102 cut-off events. For 2056898/2056898 co-relation queries the response was YES. Maximal size of possible extension queue 1513. Compared 191489 event pairs, 108 based on Foata normal form. 38/20140 useless extension candidates. Maximal degree in co-relation 283419. Up to 4929 conditions per place. [2022-12-05 22:06:37,633 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 318 selfloop transitions, 3153 changer transitions 82/3553 dead transitions. [2022-12-05 22:06:37,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 3553 transitions, 139993 flow [2022-12-05 22:06:37,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-05 22:06:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-12-05 22:06:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 289 transitions. [2022-12-05 22:06:37,640 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3158469945355191 [2022-12-05 22:06:37,640 INFO L175 Difference]: Start difference. First operand has 554 places, 2988 transitions, 116967 flow. Second operand 61 states and 289 transitions. [2022-12-05 22:06:37,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 3553 transitions, 139993 flow [2022-12-05 22:07:07,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 613 places, 3553 transitions, 138558 flow, removed 699 selfloop flow, removed 1 redundant places. [2022-12-05 22:07:07,437 INFO L231 Difference]: Finished difference. Result has 619 places, 3299 transitions, 134284 flow [2022-12-05 22:07:07,439 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=114842, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2963, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2822, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=134284, PETRI_PLACES=619, PETRI_TRANSITIONS=3299} [2022-12-05 22:07:07,439 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 599 predicate places. [2022-12-05 22:07:07,439 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 3299 transitions, 134284 flow [2022-12-05 22:07:07,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 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) [2022-12-05 22:07:07,440 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:07:07,440 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:07:07,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-05 22:07:07,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:07:07,645 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:07:07,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:07:07,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1242363861, now seen corresponding path program 28 times [2022-12-05 22:07:07,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:07:07,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175253547] [2022-12-05 22:07:07,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:07:07,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:07:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:07:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:07:07,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:07:07,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175253547] [2022-12-05 22:07:07,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175253547] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:07:07,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993592928] [2022-12-05 22:07:07,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 22:07:07,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:07:07,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:07:07,789 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:07:07,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-05 22:07:07,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 22:07:07,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:07:07,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-05 22:07:07,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:07:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:07:08,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:07:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:07:08,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993592928] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:07:08,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:07:08,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-12-05 22:07:08,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802777745] [2022-12-05 22:07:08,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:07:08,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-05 22:07:08,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:07:08,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-05 22:07:08,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-12-05 22:07:08,169 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:07:08,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 3299 transitions, 134284 flow. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 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) [2022-12-05 22:07:08,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:07:08,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:07:08,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:07:35,924 INFO L130 PetriNetUnfolder]: 11491/22515 cut-off events. [2022-12-05 22:07:35,924 INFO L131 PetriNetUnfolder]: For 2662599/2662599 co-relation queries the response was YES. [2022-12-05 22:07:36,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347469 conditions, 22515 events. 11491/22515 cut-off events. For 2662599/2662599 co-relation queries the response was YES. Maximal size of possible extension queue 1687. Compared 217451 event pairs, 289 based on Foata normal form. 20/22535 useless extension candidates. Maximal degree in co-relation 338147. Up to 6593 conditions per place. [2022-12-05 22:07:36,298 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 1806 selfloop transitions, 2299 changer transitions 81/4186 dead transitions. [2022-12-05 22:07:36,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 4186 transitions, 168944 flow [2022-12-05 22:07:36,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-05 22:07:36,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-12-05 22:07:36,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 299 transitions. [2022-12-05 22:07:36,301 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3908496732026144 [2022-12-05 22:07:36,302 INFO L175 Difference]: Start difference. First operand has 619 places, 3299 transitions, 134284 flow. Second operand 51 states and 299 transitions. [2022-12-05 22:07:36,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 4186 transitions, 168944 flow [2022-12-05 22:08:22,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 4186 transitions, 164332 flow, removed 1997 selfloop flow, removed 20 redundant places. [2022-12-05 22:08:23,037 INFO L231 Difference]: Finished difference. Result has 656 places, 3729 transitions, 156905 flow [2022-12-05 22:08:23,040 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=131286, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1870, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1044, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=156905, PETRI_PLACES=656, PETRI_TRANSITIONS=3729} [2022-12-05 22:08:23,041 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 636 predicate places. [2022-12-05 22:08:23,041 INFO L495 AbstractCegarLoop]: Abstraction has has 656 places, 3729 transitions, 156905 flow [2022-12-05 22:08:23,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 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) [2022-12-05 22:08:23,041 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:08:23,041 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:08:23,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-05 22:08:23,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:23,245 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:08:23,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:08:23,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1489537455, now seen corresponding path program 29 times [2022-12-05 22:08:23,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:08:23,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440996770] [2022-12-05 22:08:23,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:08:23,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:08:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:08:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:23,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:08:23,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440996770] [2022-12-05 22:08:23,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440996770] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:08:23,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955191986] [2022-12-05 22:08:23,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 22:08:23,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:08:23,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:08:23,370 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:08:23,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-05 22:08:23,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-05 22:08:23,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:08:23,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-05 22:08:23,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:08:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:23,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:08:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:08:23,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955191986] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:08:23,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:08:23,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-12-05 22:08:23,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900120382] [2022-12-05 22:08:23,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:08:23,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-05 22:08:23,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:08:23,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-05 22:08:23,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2022-12-05 22:08:23,806 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:08:23,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 656 places, 3729 transitions, 156905 flow. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 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) [2022-12-05 22:08:23,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:08:23,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:08:23,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:08:56,269 INFO L130 PetriNetUnfolder]: 11953/23536 cut-off events. [2022-12-05 22:08:56,269 INFO L131 PetriNetUnfolder]: For 2821223/2821223 co-relation queries the response was YES. [2022-12-05 22:08:56,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365453 conditions, 23536 events. 11953/23536 cut-off events. For 2821223/2821223 co-relation queries the response was YES. Maximal size of possible extension queue 1753. Compared 229466 event pairs, 13 based on Foata normal form. 20/23556 useless extension candidates. Maximal degree in co-relation 364742. Up to 6050 conditions per place. [2022-12-05 22:08:56,829 INFO L137 encePairwiseOnDemand]: 6/15 looper letters, 574 selfloop transitions, 3546 changer transitions 28/4148 dead transitions. [2022-12-05 22:08:56,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 4148 transitions, 174929 flow [2022-12-05 22:08:56,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-05 22:08:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-12-05 22:08:56,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 290 transitions. [2022-12-05 22:08:56,830 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3790849673202614 [2022-12-05 22:08:56,830 INFO L175 Difference]: Start difference. First operand has 656 places, 3729 transitions, 156905 flow. Second operand 51 states and 290 transitions. [2022-12-05 22:08:56,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 4148 transitions, 174929 flow [2022-12-05 22:09:49,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 4148 transitions, 172859 flow, removed 656 selfloop flow, removed 25 redundant places. [2022-12-05 22:09:49,626 INFO L231 Difference]: Finished difference. Result has 685 places, 3883 transitions, 172313 flow [2022-12-05 22:09:49,627 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=154953, PETRI_DIFFERENCE_MINUEND_PLACES=629, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=172313, PETRI_PLACES=685, PETRI_TRANSITIONS=3883} [2022-12-05 22:09:49,628 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 665 predicate places. [2022-12-05 22:09:49,628 INFO L495 AbstractCegarLoop]: Abstraction has has 685 places, 3883 transitions, 172313 flow [2022-12-05 22:09:49,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 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) [2022-12-05 22:09:49,629 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:09:49,629 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:09:49,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-05 22:09:49,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-05 22:09:49,833 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:09:49,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:09:49,833 INFO L85 PathProgramCache]: Analyzing trace with hash -176061397, now seen corresponding path program 30 times [2022-12-05 22:09:49,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:09:49,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320206899] [2022-12-05 22:09:49,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:09:49,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:09:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:09:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:09:49,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:09:49,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320206899] [2022-12-05 22:09:49,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320206899] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:09:49,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102331152] [2022-12-05 22:09:49,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 22:09:49,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:09:49,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:09:49,968 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:09:49,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-05 22:09:50,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 22:09:50,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:09:50,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-05 22:09:50,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:09:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:09:50,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:09:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:09:50,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102331152] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:09:50,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:09:50,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-12-05 22:09:50,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559470388] [2022-12-05 22:09:50,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:09:50,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-05 22:09:50,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:09:50,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-05 22:09:50,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2022-12-05 22:09:50,325 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:09:50,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 685 places, 3883 transitions, 172313 flow. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 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) [2022-12-05 22:09:50,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:09:50,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:09:50,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:10:30,170 INFO L130 PetriNetUnfolder]: 12140/23869 cut-off events. [2022-12-05 22:10:30,171 INFO L131 PetriNetUnfolder]: For 2521996/2521996 co-relation queries the response was YES. [2022-12-05 22:10:30,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373550 conditions, 23869 events. 12140/23869 cut-off events. For 2521996/2521996 co-relation queries the response was YES. Maximal size of possible extension queue 1814. Compared 233180 event pairs, 435 based on Foata normal form. 76/23945 useless extension candidates. Maximal degree in co-relation 372825. Up to 5959 conditions per place. [2022-12-05 22:10:30,882 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 543 selfloop transitions, 3578 changer transitions 24/4145 dead transitions. [2022-12-05 22:10:30,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 725 places, 4145 transitions, 186775 flow [2022-12-05 22:10:30,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-05 22:10:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-12-05 22:10:30,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 236 transitions. [2022-12-05 22:10:30,883 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3746031746031746 [2022-12-05 22:10:30,883 INFO L175 Difference]: Start difference. First operand has 685 places, 3883 transitions, 172313 flow. Second operand 42 states and 236 transitions. [2022-12-05 22:10:30,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 725 places, 4145 transitions, 186775 flow [2022-12-05 22:11:21,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 708 places, 4145 transitions, 185488 flow, removed 557 selfloop flow, removed 17 redundant places. [2022-12-05 22:11:21,575 INFO L231 Difference]: Finished difference. Result has 710 places, 3949 transitions, 181771 flow [2022-12-05 22:11:21,578 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=170936, PETRI_DIFFERENCE_MINUEND_PLACES=667, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3879, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3500, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=181771, PETRI_PLACES=710, PETRI_TRANSITIONS=3949} [2022-12-05 22:11:21,578 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 690 predicate places. [2022-12-05 22:11:21,578 INFO L495 AbstractCegarLoop]: Abstraction has has 710 places, 3949 transitions, 181771 flow [2022-12-05 22:11:21,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 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) [2022-12-05 22:11:21,578 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:11:21,578 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:11:21,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-05 22:11:21,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:11:21,783 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:11:21,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:11:21,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1644936631, now seen corresponding path program 31 times [2022-12-05 22:11:21,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:11:21,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245394826] [2022-12-05 22:11:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:11:21,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:11:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:11:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:11:21,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:11:21,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245394826] [2022-12-05 22:11:21,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245394826] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:11:21,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292516701] [2022-12-05 22:11:21,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 22:11:21,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:11:21,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:11:21,916 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:11:21,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-05 22:11:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:11:21,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-05 22:11:21,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:11:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:11:22,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:11:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:11:22,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292516701] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:11:22,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:11:22,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-12-05 22:11:22,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648086397] [2022-12-05 22:11:22,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:11:22,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-05 22:11:22,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:11:22,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-05 22:11:22,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2022-12-05 22:11:22,279 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:11:22,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 710 places, 3949 transitions, 181771 flow. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 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) [2022-12-05 22:11:22,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:11:22,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:11:22,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:12:03,565 INFO L130 PetriNetUnfolder]: 12709/24954 cut-off events. [2022-12-05 22:12:03,565 INFO L131 PetriNetUnfolder]: For 2476708/2476708 co-relation queries the response was YES. [2022-12-05 22:12:04,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393318 conditions, 24954 events. 12709/24954 cut-off events. For 2476708/2476708 co-relation queries the response was YES. Maximal size of possible extension queue 1917. Compared 245130 event pairs, 457 based on Foata normal form. 84/25038 useless extension candidates. Maximal degree in co-relation 392585. Up to 7689 conditions per place. [2022-12-05 22:12:04,520 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 844 selfloop transitions, 3524 changer transitions 12/4380 dead transitions. [2022-12-05 22:12:04,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 4380 transitions, 204751 flow [2022-12-05 22:12:04,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-05 22:12:04,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-05 22:12:04,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 225 transitions. [2022-12-05 22:12:04,523 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2022-12-05 22:12:04,523 INFO L175 Difference]: Start difference. First operand has 710 places, 3949 transitions, 181771 flow. Second operand 41 states and 225 transitions. [2022-12-05 22:12:04,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 750 places, 4380 transitions, 204751 flow [2022-12-05 22:12:56,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 729 places, 4380 transitions, 203641 flow, removed 47 selfloop flow, removed 21 redundant places. [2022-12-05 22:12:56,514 INFO L231 Difference]: Finished difference. Result has 737 places, 4195 transitions, 202334 flow [2022-12-05 22:12:56,516 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=180741, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3949, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=202334, PETRI_PLACES=737, PETRI_TRANSITIONS=4195} [2022-12-05 22:12:56,516 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 717 predicate places. [2022-12-05 22:12:56,516 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 4195 transitions, 202334 flow [2022-12-05 22:12:56,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 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) [2022-12-05 22:12:56,517 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:12:56,517 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:12:56,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-05 22:12:56,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:12:56,721 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:12:56,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:12:56,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1838821639, now seen corresponding path program 32 times [2022-12-05 22:12:56,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:12:56,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321721001] [2022-12-05 22:12:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:12:56,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:12:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:12:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:12:56,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:12:56,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321721001] [2022-12-05 22:12:56,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321721001] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:12:56,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509760304] [2022-12-05 22:12:56,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 22:12:56,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:12:56,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:12:56,858 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:12:56,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-05 22:12:56,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:12:56,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:12:56,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-05 22:12:56,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:12:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:12:57,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:12:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:12:57,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509760304] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:12:57,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:12:57,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-12-05 22:12:57,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327793401] [2022-12-05 22:12:57,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:12:57,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-05 22:12:57,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:12:57,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-05 22:12:57,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2022-12-05 22:12:57,251 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:12:57,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 4195 transitions, 202334 flow. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 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) [2022-12-05 22:12:57,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:12:57,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:12:57,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:13:54,057 INFO L130 PetriNetUnfolder]: 15684/30483 cut-off events. [2022-12-05 22:13:54,057 INFO L131 PetriNetUnfolder]: For 3350097/3350097 co-relation queries the response was YES. [2022-12-05 22:13:54,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499282 conditions, 30483 events. 15684/30483 cut-off events. For 3350097/3350097 co-relation queries the response was YES. Maximal size of possible extension queue 2300. Compared 305052 event pairs, 531 based on Foata normal form. 204/30687 useless extension candidates. Maximal degree in co-relation 498531. Up to 13545 conditions per place. [2022-12-05 22:13:55,178 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 1907 selfloop transitions, 3534 changer transitions 69/5510 dead transitions. [2022-12-05 22:13:55,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 777 places, 5510 transitions, 268539 flow [2022-12-05 22:13:55,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-05 22:13:55,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-05 22:13:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 232 transitions. [2022-12-05 22:13:55,179 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3772357723577236 [2022-12-05 22:13:55,180 INFO L175 Difference]: Start difference. First operand has 737 places, 4195 transitions, 202334 flow. Second operand 41 states and 232 transitions. [2022-12-05 22:13:55,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 777 places, 5510 transitions, 268539 flow [2022-12-05 22:15:16,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 763 places, 5510 transitions, 267879 flow, removed 242 selfloop flow, removed 14 redundant places. [2022-12-05 22:15:16,941 INFO L231 Difference]: Finished difference. Result has 781 places, 5178 transitions, 261474 flow [2022-12-05 22:15:16,944 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=201857, PETRI_DIFFERENCE_MINUEND_PLACES=723, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2590, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=261474, PETRI_PLACES=781, PETRI_TRANSITIONS=5178} [2022-12-05 22:15:16,945 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 761 predicate places. [2022-12-05 22:15:16,945 INFO L495 AbstractCegarLoop]: Abstraction has has 781 places, 5178 transitions, 261474 flow [2022-12-05 22:15:16,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 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) [2022-12-05 22:15:16,945 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:15:16,945 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:15:16,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-05 22:15:17,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-05 22:15:17,150 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:15:17,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:15:17,150 INFO L85 PathProgramCache]: Analyzing trace with hash 64571371, now seen corresponding path program 33 times [2022-12-05 22:15:17,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:15:17,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182473027] [2022-12-05 22:15:17,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:15:17,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:15:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:15:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:15:17,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:15:17,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182473027] [2022-12-05 22:15:17,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182473027] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:15:17,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123132702] [2022-12-05 22:15:17,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 22:15:17,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:15:17,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:15:17,285 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 22:15:17,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-05 22:15:17,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 22:15:17,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:15:17,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-05 22:15:17,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:15:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:15:17,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:15:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:15:17,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123132702] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:15:17,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:15:17,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-12-05 22:15:17,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974258845] [2022-12-05 22:15:17,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:15:17,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-05 22:15:17,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:15:17,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-05 22:15:17,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2022-12-05 22:15:17,671 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 22:15:17,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 781 places, 5178 transitions, 261474 flow. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 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) [2022-12-05 22:15:17,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:15:17,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 22:15:17,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:16:38,467 INFO L130 PetriNetUnfolder]: 18016/35075 cut-off events. [2022-12-05 22:16:38,468 INFO L131 PetriNetUnfolder]: For 4303833/4303833 co-relation queries the response was YES. [2022-12-05 22:16:39,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594746 conditions, 35075 events. 18016/35075 cut-off events. For 4303833/4303833 co-relation queries the response was YES. Maximal size of possible extension queue 2738. Compared 359801 event pairs, 493 based on Foata normal form. 314/35389 useless extension candidates. Maximal degree in co-relation 593958. Up to 9826 conditions per place. [2022-12-05 22:16:39,226 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 1366 selfloop transitions, 4868 changer transitions 56/6290 dead transitions. [2022-12-05 22:16:39,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 6290 transitions, 322035 flow [2022-12-05 22:16:39,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-05 22:16:39,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-12-05 22:16:39,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 236 transitions. [2022-12-05 22:16:39,227 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.36589147286821705 [2022-12-05 22:16:39,228 INFO L175 Difference]: Start difference. First operand has 781 places, 5178 transitions, 261474 flow. Second operand 43 states and 236 transitions. [2022-12-05 22:16:39,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 6290 transitions, 322035 flow Received shutdown request... [2022-12-05 22:17:14,438 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-05 22:17:14,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-05 22:17:14,477 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 [2022-12-05 22:17:14,481 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-05 22:17:14,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-05 22:17:14,645 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2022-12-05 22:17:14,647 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-05 22:17:14,647 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-05 22:17:14,647 INFO L458 BasicCegarLoop]: Path program histogram: [33, 2, 1] [2022-12-05 22:17:14,649 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-05 22:17:14,649 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-05 22:17:14,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 10:17:14 BasicIcfg [2022-12-05 22:17:14,651 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-05 22:17:14,653 INFO L158 Benchmark]: Toolchain (without parser) took 838129.37ms. Allocated memory was 194.0MB in the beginning and 3.8GB in the end (delta: 3.6GB). Free memory was 171.5MB in the beginning and 1.2GB in the end (delta: -1.0GB). Peak memory consumption was 3.0GB. Max. memory is 8.0GB. [2022-12-05 22:17:14,653 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 194.0MB. Free memory is still 170.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-05 22:17:14,653 INFO L158 Benchmark]: CACSL2BoogieTranslator took 205.50ms. Allocated memory is still 194.0MB. Free memory was 171.5MB in the beginning and 160.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-12-05 22:17:14,653 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.72ms. Allocated memory is still 194.0MB. Free memory was 160.5MB in the beginning and 158.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 22:17:14,653 INFO L158 Benchmark]: Boogie Preprocessor took 17.52ms. Allocated memory is still 194.0MB. Free memory was 158.9MB in the beginning and 157.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-05 22:17:14,654 INFO L158 Benchmark]: RCFGBuilder took 366.12ms. Allocated memory is still 194.0MB. Free memory was 157.4MB in the beginning and 143.7MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-12-05 22:17:14,654 INFO L158 Benchmark]: TraceAbstraction took 837510.15ms. Allocated memory was 194.0MB in the beginning and 3.8GB in the end (delta: 3.6GB). Free memory was 143.2MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 3.0GB. Max. memory is 8.0GB. [2022-12-05 22:17:14,655 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 194.0MB. Free memory is still 170.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 205.50ms. Allocated memory is still 194.0MB. Free memory was 171.5MB in the beginning and 160.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.72ms. Allocated memory is still 194.0MB. Free memory was 160.5MB in the beginning and 158.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.52ms. Allocated memory is still 194.0MB. Free memory was 158.9MB in the beginning and 157.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 366.12ms. Allocated memory is still 194.0MB. Free memory was 157.4MB in the beginning and 143.7MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 837510.15ms. Allocated memory was 194.0MB in the beginning and 3.8GB in the end (delta: 3.6GB). Free memory was 143.2MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 3.0GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 66 PlacesBefore, 20 PlacesAfterwards, 65 TransitionsBefore, 15 TransitionsAfterwards, 404 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 30 TrivialYvCompositions, 16 ConcurrentYvCompositions, 4 ChoiceCompositions, 50 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 199, independent: 197, independent conditional: 197, independent unconditional: 0, dependent: 2, dependent conditional: 2, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 199, independent: 197, independent conditional: 0, independent unconditional: 197, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 199, independent: 197, independent conditional: 0, independent unconditional: 197, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 199, independent: 197, independent conditional: 0, independent unconditional: 197, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 199, independent: 197, independent conditional: 0, independent unconditional: 197, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 199, independent: 197, independent conditional: 0, independent unconditional: 197, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 9, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 199, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 199, unknown conditional: 0, unknown unconditional: 199] , Statistics on independence cache: Total cache size (in pairs): 313, Positive cache size: 311, Positive conditional cache size: 0, Positive unconditional cache size: 311, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - 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 executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 87 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 837.4s, OverallIterations: 36, TraceHistogramMax: 5, PathProgramHistogramMax: 33, EmptinessCheckTime: 0.0s, AutomataDifference: 814.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5519 SdHoareTripleChecker+Valid, 8.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5519 mSDsluCounter, 584 SdHoareTripleChecker+Invalid, 6.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 420 mSDsCounter, 1389 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19696 IncrementalHoareTripleChecker+Invalid, 21085 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1389 mSolverCounterUnsat, 164 mSDtfsCounter, 19696 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2637 GetRequests, 1246 SyntacticMatches, 61 SemanticMatches, 1330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19516 ImplicationChecksByTransitivity, 15.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=261474occurred in iteration=35, InterpolantAutomatonStates: 912, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 11.5s InterpolantComputationTime, 1257 NumberOfCodeBlocks, 1247 NumberOfCodeBlocksAsserted, 115 NumberOfCheckSat, 1755 ConstructedInterpolants, 0 QuantifiedInterpolants, 9950 SizeOfPredicates, 219 NumberOfNonLiveVariables, 4177 ConjunctsInSsa, 413 ConjunctsInUnsatCore, 103 InterpolantComputations, 4 PerfectInterpolantSequences, 288/1026 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 [2022-12-05 22:17:14,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Completed graceful shutdown