/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 21:27:47,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 21:27:47,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 21:27:47,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 21:27:47,347 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 21:27:47,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 21:27:47,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 21:27:47,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 21:27:47,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 21:27:47,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 21:27:47,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 21:27:47,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 21:27:47,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 21:27:47,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 21:27:47,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 21:27:47,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 21:27:47,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 21:27:47,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 21:27:47,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 21:27:47,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 21:27:47,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 21:27:47,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 21:27:47,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 21:27:47,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 21:27:47,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 21:27:47,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 21:27:47,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 21:27:47,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 21:27:47,391 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-VariableLbe.epf [2023-01-27 21:27:47,412 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 21:27:47,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 21:27:47,414 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 21:27:47,414 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 21:27:47,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 21:27:47,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 21:27:47,415 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 21:27:47,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 21:27:47,415 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 21:27:47,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 21:27:47,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 21:27:47,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 21:27:47,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 21:27:47,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 21:27:47,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 21:27:47,416 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 21:27:47,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 21:27:47,416 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 21:27:47,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 21:27:47,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 21:27:47,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 21:27:47,416 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 21:27:47,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 21:27:47,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:27:47,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 21:27:47,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 21:27:47,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 21:27:47,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 21:27:47,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 21:27:47,417 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 21:27:47,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 21:27:47,417 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 21:27:47,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 21:27:47,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 21:27:47,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 21:27:47,612 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 21:27:47,613 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 21:27:47,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-01-27 21:27:48,559 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 21:27:48,777 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 21:27:48,777 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-01-27 21:27:48,783 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f8c35e65/4f96c6220ded4ba4a3e2d3341d906bac/FLAG764446814 [2023-01-27 21:27:48,797 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f8c35e65/4f96c6220ded4ba4a3e2d3341d906bac [2023-01-27 21:27:48,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 21:27:48,800 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 21:27:48,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 21:27:48,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 21:27:48,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 21:27:48,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:27:48" (1/1) ... [2023-01-27 21:27:48,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76d91f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:27:48, skipping insertion in model container [2023-01-27 21:27:48,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:27:48" (1/1) ... [2023-01-27 21:27:48,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 21:27:48,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 21:27:48,936 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2947,2960] [2023-01-27 21:27:48,942 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:27:48,948 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 21:27:48,961 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2947,2960] [2023-01-27 21:27:48,963 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:27:48,969 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:27:48,969 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:27:48,973 INFO L208 MainTranslator]: Completed translation [2023-01-27 21:27:48,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:27:48 WrapperNode [2023-01-27 21:27:48,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 21:27:48,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 21:27:48,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 21:27:48,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 21:27:48,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:27:48" (1/1) ... [2023-01-27 21:27:48,985 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:27:48" (1/1) ... [2023-01-27 21:27:49,009 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 155 [2023-01-27 21:27:49,009 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 21:27:49,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 21:27:49,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 21:27:49,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 21:27:49,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:27:48" (1/1) ... [2023-01-27 21:27:49,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:27:48" (1/1) ... [2023-01-27 21:27:49,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:27:48" (1/1) ... [2023-01-27 21:27:49,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:27:48" (1/1) ... [2023-01-27 21:27:49,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:27:48" (1/1) ... [2023-01-27 21:27:49,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:27:48" (1/1) ... [2023-01-27 21:27:49,026 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:27:48" (1/1) ... [2023-01-27 21:27:49,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:27:48" (1/1) ... [2023-01-27 21:27:49,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 21:27:49,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 21:27:49,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 21:27:49,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 21:27:49,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:27:48" (1/1) ... [2023-01-27 21:27:49,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:27:49,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:27:49,064 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) [2023-01-27 21:27:49,068 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 [2023-01-27 21:27:49,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 21:27:49,097 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 21:27:49,097 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 21:27:49,097 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 21:27:49,097 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 21:27:49,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 21:27:49,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 21:27:49,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 21:27:49,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 21:27:49,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 21:27:49,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 21:27:49,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 21:27:49,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 21:27:49,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 21:27:49,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 21:27:49,099 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 21:27:49,164 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 21:27:49,165 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 21:27:49,369 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 21:27:49,427 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 21:27:49,427 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-27 21:27:49,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:27:49 BoogieIcfgContainer [2023-01-27 21:27:49,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 21:27:49,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 21:27:49,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 21:27:49,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 21:27:49,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 09:27:48" (1/3) ... [2023-01-27 21:27:49,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@337f00de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:27:49, skipping insertion in model container [2023-01-27 21:27:49,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:27:48" (2/3) ... [2023-01-27 21:27:49,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@337f00de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:27:49, skipping insertion in model container [2023-01-27 21:27:49,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:27:49" (3/3) ... [2023-01-27 21:27:49,435 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-01-27 21:27:49,447 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 21:27:49,447 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 21:27:49,447 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 21:27:49,516 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 21:27:49,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 135 transitions, 286 flow [2023-01-27 21:27:49,593 INFO L130 PetriNetUnfolder]: 11/133 cut-off events. [2023-01-27 21:27:49,593 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 21:27:49,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 133 events. 11/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 126 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-01-27 21:27:49,597 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 135 transitions, 286 flow [2023-01-27 21:27:49,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 125 transitions, 262 flow [2023-01-27 21:27:49,603 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 21:27:49,608 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 125 transitions, 262 flow [2023-01-27 21:27:49,610 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 125 transitions, 262 flow [2023-01-27 21:27:49,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 125 transitions, 262 flow [2023-01-27 21:27:49,640 INFO L130 PetriNetUnfolder]: 11/125 cut-off events. [2023-01-27 21:27:49,640 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 21:27:49,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 125 events. 11/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 125 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-01-27 21:27:49,642 INFO L119 LiptonReduction]: Number of co-enabled transitions 1296 [2023-01-27 21:27:52,938 INFO L134 LiptonReduction]: Checked pairs total: 1508 [2023-01-27 21:27:52,938 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-01-27 21:27:52,955 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 21:27:52,961 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;@7c733f5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 21:27:52,962 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 21:27:52,974 INFO L130 PetriNetUnfolder]: 4/18 cut-off events. [2023-01-27 21:27:52,974 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 21:27:52,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:27:52,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:27:52,976 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:27:52,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:27:52,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1385195944, now seen corresponding path program 1 times [2023-01-27 21:27:52,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:27:52,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897088957] [2023-01-27 21:27:52,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:27:52,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:27:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:27:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:27:53,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:27:53,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897088957] [2023-01-27 21:27:53,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897088957] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:27:53,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:27:53,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 21:27:53,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746540689] [2023-01-27 21:27:53,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:27:53,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 21:27:53,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:27:53,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 21:27:53,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 21:27:53,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 267 [2023-01-27 21:27:53,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 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) [2023-01-27 21:27:53,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:27:53,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 267 [2023-01-27 21:27:53,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:27:53,469 INFO L130 PetriNetUnfolder]: 87/153 cut-off events. [2023-01-27 21:27:53,470 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-27 21:27:53,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 153 events. 87/153 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 486 event pairs, 21 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 244. Up to 87 conditions per place. [2023-01-27 21:27:53,473 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 21 selfloop transitions, 2 changer transitions 4/29 dead transitions. [2023-01-27 21:27:53,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 133 flow [2023-01-27 21:27:53,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 21:27:53,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 21:27:53,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-01-27 21:27:53,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681647940074906 [2023-01-27 21:27:53,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-01-27 21:27:53,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-01-27 21:27:53,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:27:53,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-01-27 21:27:53,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 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) [2023-01-27 21:27:53,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 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) [2023-01-27 21:27:53,508 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 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) [2023-01-27 21:27:53,510 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 375 transitions. [2023-01-27 21:27:53,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 133 flow [2023-01-27 21:27:53,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 21:27:53,513 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 52 flow [2023-01-27 21:27:53,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2023-01-27 21:27:53,518 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-01-27 21:27:53,519 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 52 flow [2023-01-27 21:27:53,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 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) [2023-01-27 21:27:53,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:27:53,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:27:53,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 21:27:53,520 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:27:53,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:27:53,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1301726337, now seen corresponding path program 1 times [2023-01-27 21:27:53,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:27:53,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459870326] [2023-01-27 21:27:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:27:53,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:27:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:27:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:27:53,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:27:53,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459870326] [2023-01-27 21:27:53,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459870326] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:27:53,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:27:53,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 21:27:53,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350014688] [2023-01-27 21:27:53,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:27:53,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 21:27:53,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:27:53,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 21:27:53,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 21:27:53,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 267 [2023-01-27 21:27:53,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 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) [2023-01-27 21:27:53,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:27:53,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 267 [2023-01-27 21:27:53,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:27:53,812 INFO L130 PetriNetUnfolder]: 74/139 cut-off events. [2023-01-27 21:27:53,813 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 21:27:53,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 139 events. 74/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 381 event pairs, 11 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 191. Up to 98 conditions per place. [2023-01-27 21:27:53,814 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 21 selfloop transitions, 4 changer transitions 6/32 dead transitions. [2023-01-27 21:27:53,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 32 transitions, 143 flow [2023-01-27 21:27:53,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 21:27:53,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 21:27:53,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 455 transitions. [2023-01-27 21:27:53,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42602996254681647 [2023-01-27 21:27:53,817 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 455 transitions. [2023-01-27 21:27:53,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 455 transitions. [2023-01-27 21:27:53,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:27:53,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 455 transitions. [2023-01-27 21:27:53,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.75) internal successors, (455), 4 states have internal predecessors, (455), 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) [2023-01-27 21:27:53,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 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) [2023-01-27 21:27:53,822 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 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) [2023-01-27 21:27:53,822 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 52 flow. Second operand 4 states and 455 transitions. [2023-01-27 21:27:53,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 32 transitions, 143 flow [2023-01-27 21:27:53,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 32 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 21:27:53,823 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 75 flow [2023-01-27 21:27:53,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=75, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2023-01-27 21:27:53,824 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-01-27 21:27:53,824 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 75 flow [2023-01-27 21:27:53,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 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) [2023-01-27 21:27:53,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:27:53,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:27:53,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 21:27:53,825 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:27:53,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:27:53,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1080410029, now seen corresponding path program 1 times [2023-01-27 21:27:53,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:27:53,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200151682] [2023-01-27 21:27:53,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:27:53,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:27:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:27:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:27:53,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:27:53,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200151682] [2023-01-27 21:27:53,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200151682] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:27:53,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:27:53,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 21:27:53,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713101034] [2023-01-27 21:27:53,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:27:53,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 21:27:53,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:27:53,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 21:27:53,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 21:27:53,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 267 [2023-01-27 21:27:53,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 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) [2023-01-27 21:27:53,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:27:53,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 267 [2023-01-27 21:27:53,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:27:54,044 INFO L130 PetriNetUnfolder]: 74/157 cut-off events. [2023-01-27 21:27:54,045 INFO L131 PetriNetUnfolder]: For 37/46 co-relation queries the response was YES. [2023-01-27 21:27:54,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 157 events. 74/157 cut-off events. For 37/46 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 523 event pairs, 50 based on Foata normal form. 14/166 useless extension candidates. Maximal degree in co-relation 269. Up to 123 conditions per place. [2023-01-27 21:27:54,047 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 18 selfloop transitions, 2 changer transitions 10/33 dead transitions. [2023-01-27 21:27:54,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 161 flow [2023-01-27 21:27:54,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 21:27:54,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 21:27:54,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 440 transitions. [2023-01-27 21:27:54,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41198501872659177 [2023-01-27 21:27:54,049 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 440 transitions. [2023-01-27 21:27:54,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 440 transitions. [2023-01-27 21:27:54,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:27:54,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 440 transitions. [2023-01-27 21:27:54,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 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) [2023-01-27 21:27:54,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 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) [2023-01-27 21:27:54,052 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 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) [2023-01-27 21:27:54,052 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 75 flow. Second operand 4 states and 440 transitions. [2023-01-27 21:27:54,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 161 flow [2023-01-27 21:27:54,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 161 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 21:27:54,054 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 91 flow [2023-01-27 21:27:54,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2023-01-27 21:27:54,055 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 8 predicate places. [2023-01-27 21:27:54,057 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 91 flow [2023-01-27 21:27:54,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 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) [2023-01-27 21:27:54,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:27:54,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:27:54,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 21:27:54,058 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:27:54,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:27:54,058 INFO L85 PathProgramCache]: Analyzing trace with hash -350690420, now seen corresponding path program 1 times [2023-01-27 21:27:54,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:27:54,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456224856] [2023-01-27 21:27:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:27:54,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:27:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:27:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:27:54,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:27:54,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456224856] [2023-01-27 21:27:54,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456224856] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:27:54,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165017716] [2023-01-27 21:27:54,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:27:54,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:27:54,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:27:54,207 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) [2023-01-27 21:27:54,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 21:27:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:27:54,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 21:27:54,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:27:54,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 116 [2023-01-27 21:27:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:27:54,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:27:54,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2023-01-27 21:27:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:27:54,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165017716] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:27:54,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:27:54,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 10 [2023-01-27 21:27:54,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660427518] [2023-01-27 21:27:54,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:27:54,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 21:27:54,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:27:54,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 21:27:54,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-01-27 21:27:54,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 267 [2023-01-27 21:27:54,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 91 flow. Second operand has 11 states, 11 states have (on average 109.72727272727273) internal successors, (1207), 11 states have internal predecessors, (1207), 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) [2023-01-27 21:27:54,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:27:54,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 267 [2023-01-27 21:27:54,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:27:55,003 INFO L130 PetriNetUnfolder]: 98/190 cut-off events. [2023-01-27 21:27:55,003 INFO L131 PetriNetUnfolder]: For 70/73 co-relation queries the response was YES. [2023-01-27 21:27:55,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 190 events. 98/190 cut-off events. For 70/73 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 596 event pairs, 9 based on Foata normal form. 10/197 useless extension candidates. Maximal degree in co-relation 468. Up to 39 conditions per place. [2023-01-27 21:27:55,005 INFO L137 encePairwiseOnDemand]: 261/267 looper letters, 21 selfloop transitions, 6 changer transitions 25/53 dead transitions. [2023-01-27 21:27:55,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 270 flow [2023-01-27 21:27:55,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:27:55,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:27:55,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 900 transitions. [2023-01-27 21:27:55,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42134831460674155 [2023-01-27 21:27:55,007 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 900 transitions. [2023-01-27 21:27:55,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 900 transitions. [2023-01-27 21:27:55,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:27:55,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 900 transitions. [2023-01-27 21:27:55,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.5) internal successors, (900), 8 states have internal predecessors, (900), 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) [2023-01-27 21:27:55,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 267.0) internal successors, (2403), 9 states have internal predecessors, (2403), 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) [2023-01-27 21:27:55,012 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 267.0) internal successors, (2403), 9 states have internal predecessors, (2403), 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) [2023-01-27 21:27:55,012 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 91 flow. Second operand 8 states and 900 transitions. [2023-01-27 21:27:55,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 270 flow [2023-01-27 21:27:55,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 53 transitions, 262 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-27 21:27:55,014 INFO L231 Difference]: Finished difference. Result has 35 places, 21 transitions, 86 flow [2023-01-27 21:27:55,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=21} [2023-01-27 21:27:55,015 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2023-01-27 21:27:55,015 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 21 transitions, 86 flow [2023-01-27 21:27:55,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 109.72727272727273) internal successors, (1207), 11 states have internal predecessors, (1207), 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) [2023-01-27 21:27:55,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:27:55,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:27:55,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 21:27:55,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:27:55,221 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:27:55,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:27:55,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1764708894, now seen corresponding path program 2 times [2023-01-27 21:27:55,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:27:55,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285937812] [2023-01-27 21:27:55,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:27:55,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:27:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:27:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:27:55,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:27:55,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285937812] [2023-01-27 21:27:55,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285937812] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:27:55,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720144160] [2023-01-27 21:27:55,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:27:55,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:27:55,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:27:55,780 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) [2023-01-27 21:27:55,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 21:27:55,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:27:55,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:27:55,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-27 21:27:55,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:27:55,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 21:27:55,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:27:55,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:27:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:27:56,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:27:56,642 WARN L839 $PredicateComparison]: unable to prove that (or (let ((.cse1 (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_102 (Array Int Int)) (v_ArrVal_103 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_102) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_103) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (<= (+ (select .cse0 .cse1) c_~sum~0) 1) (not (= (select .cse0 .cse2) 1))))) (forall ((v_ArrVal_102 (Array Int Int)) (v_ArrVal_103 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_102) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_103) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (<= 0 (+ (select .cse3 .cse1) c_~sum~0)) (not (= (select .cse3 .cse2) 1))))))) (<= c_~n~0 c_~back~0) (<= (+ c_~back~0 1) c_~front~0) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~back~0 0)) is different from false [2023-01-27 21:27:56,664 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:27:56,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-01-27 21:27:56,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:27:56,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 140 [2023-01-27 21:27:56,681 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:27:56,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 116 [2023-01-27 21:27:56,691 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:27:56,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 79 [2023-01-27 21:27:56,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:27:56,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-01-27 21:27:56,913 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 21:27:56,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 288 [2023-01-27 21:27:56,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:27:56,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 84 [2023-01-27 21:27:56,934 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 21:27:56,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 75 [2023-01-27 21:27:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-01-27 21:27:57,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720144160] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:27:57,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:27:57,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2023-01-27 21:27:57,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066843098] [2023-01-27 21:27:57,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:27:57,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 21:27:57,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:27:57,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 21:27:57,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=526, Unknown=2, NotChecked=48, Total=702 [2023-01-27 21:27:57,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 267 [2023-01-27 21:27:57,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 21 transitions, 86 flow. Second operand has 27 states, 27 states have (on average 67.81481481481481) internal successors, (1831), 27 states have internal predecessors, (1831), 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) [2023-01-27 21:27:57,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:27:57,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 267 [2023-01-27 21:27:57,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:28:14,422 WARN L222 SmtUtils]: Spent 8.21s on a formula simplification. DAG size of input: 61 DAG size of output: 51 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 21:28:15,628 INFO L130 PetriNetUnfolder]: 375/677 cut-off events. [2023-01-27 21:28:15,629 INFO L131 PetriNetUnfolder]: For 438/438 co-relation queries the response was YES. [2023-01-27 21:28:15,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2009 conditions, 677 events. 375/677 cut-off events. For 438/438 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2943 event pairs, 12 based on Foata normal form. 17/690 useless extension candidates. Maximal degree in co-relation 1249. Up to 140 conditions per place. [2023-01-27 21:28:15,632 INFO L137 encePairwiseOnDemand]: 256/267 looper letters, 113 selfloop transitions, 65 changer transitions 43/221 dead transitions. [2023-01-27 21:28:15,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 221 transitions, 1263 flow [2023-01-27 21:28:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-01-27 21:28:15,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-01-27 21:28:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3263 transitions. [2023-01-27 21:28:15,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26567334310372903 [2023-01-27 21:28:15,644 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3263 transitions. [2023-01-27 21:28:15,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3263 transitions. [2023-01-27 21:28:15,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:28:15,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3263 transitions. [2023-01-27 21:28:15,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 70.93478260869566) internal successors, (3263), 46 states have internal predecessors, (3263), 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) [2023-01-27 21:28:15,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 267.0) internal successors, (12549), 47 states have internal predecessors, (12549), 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) [2023-01-27 21:28:15,667 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 267.0) internal successors, (12549), 47 states have internal predecessors, (12549), 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) [2023-01-27 21:28:15,667 INFO L175 Difference]: Start difference. First operand has 35 places, 21 transitions, 86 flow. Second operand 46 states and 3263 transitions. [2023-01-27 21:28:15,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 221 transitions, 1263 flow [2023-01-27 21:28:15,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 221 transitions, 1077 flow, removed 48 selfloop flow, removed 5 redundant places. [2023-01-27 21:28:15,674 INFO L231 Difference]: Finished difference. Result has 80 places, 99 transitions, 561 flow [2023-01-27 21:28:15,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=561, PETRI_PLACES=80, PETRI_TRANSITIONS=99} [2023-01-27 21:28:15,676 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 58 predicate places. [2023-01-27 21:28:15,676 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 99 transitions, 561 flow [2023-01-27 21:28:15,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 67.81481481481481) internal successors, (1831), 27 states have internal predecessors, (1831), 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) [2023-01-27 21:28:15,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:28:15,677 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:28:15,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 21:28:15,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:28:15,895 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:28:15,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:28:15,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1161701845, now seen corresponding path program 3 times [2023-01-27 21:28:15,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:28:15,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20507004] [2023-01-27 21:28:15,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:28:15,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:28:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:28:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:28:16,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:28:16,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20507004] [2023-01-27 21:28:16,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20507004] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:28:16,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194977480] [2023-01-27 21:28:16,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:28:16,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:28:16,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:28:16,057 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) [2023-01-27 21:28:16,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 21:28:16,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:28:16,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:28:16,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 21:28:16,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:28:16,224 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:28:16,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 9 [2023-01-27 21:28:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:28:16,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:28:16,657 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 21:28:16,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 183 [2023-01-27 21:28:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:28:16,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194977480] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:28:16,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:28:16,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2023-01-27 21:28:16,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45395437] [2023-01-27 21:28:16,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:28:16,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 21:28:16,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:28:16,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 21:28:16,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-01-27 21:28:16,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 267 [2023-01-27 21:28:16,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 99 transitions, 561 flow. Second operand has 17 states, 17 states have (on average 92.88235294117646) internal successors, (1579), 17 states have internal predecessors, (1579), 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) [2023-01-27 21:28:16,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:28:16,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 267 [2023-01-27 21:28:16,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:28:17,486 INFO L130 PetriNetUnfolder]: 855/1488 cut-off events. [2023-01-27 21:28:17,487 INFO L131 PetriNetUnfolder]: For 792/792 co-relation queries the response was YES. [2023-01-27 21:28:17,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4611 conditions, 1488 events. 855/1488 cut-off events. For 792/792 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7401 event pairs, 26 based on Foata normal form. 0/1446 useless extension candidates. Maximal degree in co-relation 4515. Up to 302 conditions per place. [2023-01-27 21:28:17,494 INFO L137 encePairwiseOnDemand]: 260/267 looper letters, 163 selfloop transitions, 188 changer transitions 1/352 dead transitions. [2023-01-27 21:28:17,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 352 transitions, 2457 flow [2023-01-27 21:28:17,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-27 21:28:17,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-27 21:28:17,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3153 transitions. [2023-01-27 21:28:17,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3578481443649983 [2023-01-27 21:28:17,501 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3153 transitions. [2023-01-27 21:28:17,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3153 transitions. [2023-01-27 21:28:17,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:28:17,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3153 transitions. [2023-01-27 21:28:17,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 95.54545454545455) internal successors, (3153), 33 states have internal predecessors, (3153), 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) [2023-01-27 21:28:17,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 267.0) internal successors, (9078), 34 states have internal predecessors, (9078), 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) [2023-01-27 21:28:17,517 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 267.0) internal successors, (9078), 34 states have internal predecessors, (9078), 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) [2023-01-27 21:28:17,517 INFO L175 Difference]: Start difference. First operand has 80 places, 99 transitions, 561 flow. Second operand 33 states and 3153 transitions. [2023-01-27 21:28:17,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 352 transitions, 2457 flow [2023-01-27 21:28:17,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 352 transitions, 2080 flow, removed 182 selfloop flow, removed 7 redundant places. [2023-01-27 21:28:17,528 INFO L231 Difference]: Finished difference. Result has 109 places, 253 transitions, 1649 flow [2023-01-27 21:28:17,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1649, PETRI_PLACES=109, PETRI_TRANSITIONS=253} [2023-01-27 21:28:17,530 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 87 predicate places. [2023-01-27 21:28:17,530 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 253 transitions, 1649 flow [2023-01-27 21:28:17,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 92.88235294117646) internal successors, (1579), 17 states have internal predecessors, (1579), 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) [2023-01-27 21:28:17,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:28:17,531 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:28:17,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-27 21:28:17,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:28:17,752 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:28:17,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:28:17,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1509252043, now seen corresponding path program 4 times [2023-01-27 21:28:17,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:28:17,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040957790] [2023-01-27 21:28:17,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:28:17,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:28:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:28:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:28:17,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:28:17,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040957790] [2023-01-27 21:28:17,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040957790] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:28:17,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388445053] [2023-01-27 21:28:17,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:28:17,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:28:17,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:28:17,900 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) [2023-01-27 21:28:17,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 21:28:17,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:28:17,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:28:17,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-27 21:28:17,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:28:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:28:18,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:28:18,313 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 21:28:18,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 163 [2023-01-27 21:28:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:28:18,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388445053] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:28:18,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:28:18,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-01-27 21:28:18,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810463349] [2023-01-27 21:28:18,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:28:18,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 21:28:18,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:28:18,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 21:28:18,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-01-27 21:28:18,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 267 [2023-01-27 21:28:18,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 253 transitions, 1649 flow. Second operand has 12 states, 12 states have (on average 88.41666666666667) internal successors, (1061), 12 states have internal predecessors, (1061), 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) [2023-01-27 21:28:18,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:28:18,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 267 [2023-01-27 21:28:18,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:28:18,593 INFO L130 PetriNetUnfolder]: 553/996 cut-off events. [2023-01-27 21:28:18,593 INFO L131 PetriNetUnfolder]: For 529/529 co-relation queries the response was YES. [2023-01-27 21:28:18,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3376 conditions, 996 events. 553/996 cut-off events. For 529/529 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4514 event pairs, 286 based on Foata normal form. 22/989 useless extension candidates. Maximal degree in co-relation 3301. Up to 894 conditions per place. [2023-01-27 21:28:18,599 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 176 selfloop transitions, 5 changer transitions 1/182 dead transitions. [2023-01-27 21:28:18,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 182 transitions, 1507 flow [2023-01-27 21:28:18,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 21:28:18,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 21:28:18,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 555 transitions. [2023-01-27 21:28:18,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3464419475655431 [2023-01-27 21:28:18,602 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 555 transitions. [2023-01-27 21:28:18,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 555 transitions. [2023-01-27 21:28:18,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:28:18,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 555 transitions. [2023-01-27 21:28:18,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.5) internal successors, (555), 6 states have internal predecessors, (555), 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) [2023-01-27 21:28:18,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 267.0) internal successors, (1869), 7 states have internal predecessors, (1869), 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) [2023-01-27 21:28:18,606 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 267.0) internal successors, (1869), 7 states have internal predecessors, (1869), 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) [2023-01-27 21:28:18,606 INFO L175 Difference]: Start difference. First operand has 109 places, 253 transitions, 1649 flow. Second operand 6 states and 555 transitions. [2023-01-27 21:28:18,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 182 transitions, 1507 flow [2023-01-27 21:28:18,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 182 transitions, 1354 flow, removed 50 selfloop flow, removed 10 redundant places. [2023-01-27 21:28:18,618 INFO L231 Difference]: Finished difference. Result has 90 places, 171 transitions, 970 flow [2023-01-27 21:28:18,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=970, PETRI_PLACES=90, PETRI_TRANSITIONS=171} [2023-01-27 21:28:18,618 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 68 predicate places. [2023-01-27 21:28:18,618 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 171 transitions, 970 flow [2023-01-27 21:28:18,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 88.41666666666667) internal successors, (1061), 12 states have internal predecessors, (1061), 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) [2023-01-27 21:28:18,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:28:18,619 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:28:18,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-27 21:28:18,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:28:18,824 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:28:18,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:28:18,824 INFO L85 PathProgramCache]: Analyzing trace with hash 655996225, now seen corresponding path program 5 times [2023-01-27 21:28:18,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:28:18,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590796816] [2023-01-27 21:28:18,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:28:18,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:28:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:28:19,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:28:19,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:28:19,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590796816] [2023-01-27 21:28:19,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590796816] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:28:19,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599923209] [2023-01-27 21:28:19,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:28:19,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:28:19,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:28:19,578 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) [2023-01-27 21:28:19,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 21:28:19,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 21:28:19,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:28:19,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 31 conjunts are in the unsatisfiable core [2023-01-27 21:28:19,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:28:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:28:19,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:28:20,092 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:28:20,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 146 [2023-01-27 21:28:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 21:28:20,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599923209] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:28:20,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:28:20,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 23 [2023-01-27 21:28:20,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101035305] [2023-01-27 21:28:20,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:28:20,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 21:28:20,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:28:20,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 21:28:20,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2023-01-27 21:28:20,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 267 [2023-01-27 21:28:20,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 171 transitions, 970 flow. Second operand has 25 states, 25 states have (on average 75.16) internal successors, (1879), 25 states have internal predecessors, (1879), 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) [2023-01-27 21:28:20,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:28:20,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 267 [2023-01-27 21:28:20,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:28:21,432 INFO L130 PetriNetUnfolder]: 1047/1843 cut-off events. [2023-01-27 21:28:21,432 INFO L131 PetriNetUnfolder]: For 660/660 co-relation queries the response was YES. [2023-01-27 21:28:21,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5783 conditions, 1843 events. 1047/1843 cut-off events. For 660/660 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9631 event pairs, 39 based on Foata normal form. 7/1788 useless extension candidates. Maximal degree in co-relation 5456. Up to 461 conditions per place. [2023-01-27 21:28:21,440 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 243 selfloop transitions, 133 changer transitions 28/404 dead transitions. [2023-01-27 21:28:21,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 404 transitions, 2874 flow [2023-01-27 21:28:21,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-27 21:28:21,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-27 21:28:21,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2874 transitions. [2023-01-27 21:28:21,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29092013361676283 [2023-01-27 21:28:21,444 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2874 transitions. [2023-01-27 21:28:21,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2874 transitions. [2023-01-27 21:28:21,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:28:21,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2874 transitions. [2023-01-27 21:28:21,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 77.67567567567568) internal successors, (2874), 37 states have internal predecessors, (2874), 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) [2023-01-27 21:28:21,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 267.0) internal successors, (10146), 38 states have internal predecessors, (10146), 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) [2023-01-27 21:28:21,457 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 267.0) internal successors, (10146), 38 states have internal predecessors, (10146), 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) [2023-01-27 21:28:21,457 INFO L175 Difference]: Start difference. First operand has 90 places, 171 transitions, 970 flow. Second operand 37 states and 2874 transitions. [2023-01-27 21:28:21,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 404 transitions, 2874 flow [2023-01-27 21:28:21,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 404 transitions, 2865 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 21:28:21,465 INFO L231 Difference]: Finished difference. Result has 131 places, 246 transitions, 1858 flow [2023-01-27 21:28:21,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1858, PETRI_PLACES=131, PETRI_TRANSITIONS=246} [2023-01-27 21:28:21,465 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 109 predicate places. [2023-01-27 21:28:21,465 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 246 transitions, 1858 flow [2023-01-27 21:28:21,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 75.16) internal successors, (1879), 25 states have internal predecessors, (1879), 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) [2023-01-27 21:28:21,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:28:21,466 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:28:21,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 21:28:21,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:28:21,671 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:28:21,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:28:21,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1631762424, now seen corresponding path program 6 times [2023-01-27 21:28:21,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:28:21,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739619609] [2023-01-27 21:28:21,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:28:21,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:28:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:28:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:28:21,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:28:21,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739619609] [2023-01-27 21:28:21,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739619609] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:28:21,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044995293] [2023-01-27 21:28:21,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:28:21,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:28:21,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:28:21,804 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) [2023-01-27 21:28:21,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 21:28:21,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 21:28:21,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:28:21,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-27 21:28:21,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:28:22,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 116 [2023-01-27 21:28:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:28:22,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:28:22,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2023-01-27 21:28:22,222 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-27 21:28:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:28:22,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044995293] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:28:22,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:28:22,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-01-27 21:28:22,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060284202] [2023-01-27 21:28:22,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:28:22,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 21:28:22,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:28:22,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 21:28:22,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-01-27 21:28:22,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 267 [2023-01-27 21:28:22,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 246 transitions, 1858 flow. Second operand has 15 states, 15 states have (on average 95.06666666666666) internal successors, (1426), 15 states have internal predecessors, (1426), 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) [2023-01-27 21:28:22,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:28:22,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 267 [2023-01-27 21:28:22,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:28:22,589 INFO L130 PetriNetUnfolder]: 922/1624 cut-off events. [2023-01-27 21:28:22,589 INFO L131 PetriNetUnfolder]: For 1498/1498 co-relation queries the response was YES. [2023-01-27 21:28:22,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5896 conditions, 1624 events. 922/1624 cut-off events. For 1498/1498 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8154 event pairs, 159 based on Foata normal form. 20/1636 useless extension candidates. Maximal degree in co-relation 4971. Up to 1339 conditions per place. [2023-01-27 21:28:22,597 INFO L137 encePairwiseOnDemand]: 261/267 looper letters, 207 selfloop transitions, 33 changer transitions 16/260 dead transitions. [2023-01-27 21:28:22,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 260 transitions, 2344 flow [2023-01-27 21:28:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 21:28:22,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 21:28:22,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 977 transitions. [2023-01-27 21:28:22,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3659176029962547 [2023-01-27 21:28:22,598 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 977 transitions. [2023-01-27 21:28:22,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 977 transitions. [2023-01-27 21:28:22,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:28:22,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 977 transitions. [2023-01-27 21:28:22,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 97.7) internal successors, (977), 10 states have internal predecessors, (977), 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) [2023-01-27 21:28:22,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 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) [2023-01-27 21:28:22,602 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 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) [2023-01-27 21:28:22,602 INFO L175 Difference]: Start difference. First operand has 131 places, 246 transitions, 1858 flow. Second operand 10 states and 977 transitions. [2023-01-27 21:28:22,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 260 transitions, 2344 flow [2023-01-27 21:28:22,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 260 transitions, 2218 flow, removed 38 selfloop flow, removed 9 redundant places. [2023-01-27 21:28:22,612 INFO L231 Difference]: Finished difference. Result has 129 places, 228 transitions, 1706 flow [2023-01-27 21:28:22,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1706, PETRI_PLACES=129, PETRI_TRANSITIONS=228} [2023-01-27 21:28:22,613 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 107 predicate places. [2023-01-27 21:28:22,613 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 228 transitions, 1706 flow [2023-01-27 21:28:22,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 95.06666666666666) internal successors, (1426), 15 states have internal predecessors, (1426), 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) [2023-01-27 21:28:22,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:28:22,614 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:28:22,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-27 21:28:22,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:28:22,819 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:28:22,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:28:22,820 INFO L85 PathProgramCache]: Analyzing trace with hash 398771022, now seen corresponding path program 7 times [2023-01-27 21:28:22,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:28:22,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889453422] [2023-01-27 21:28:22,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:28:22,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:28:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:28:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:28:23,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:28:23,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889453422] [2023-01-27 21:28:23,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889453422] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:28:23,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316356630] [2023-01-27 21:28:23,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:28:23,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:28:23,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:28:23,509 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) [2023-01-27 21:28:23,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 21:28:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:28:23,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-27 21:28:23,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:28:23,862 INFO L321 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-01-27 21:28:23,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 15 [2023-01-27 21:28:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:28:23,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:28:24,448 INFO L321 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-01-27 21:28:24,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 258 treesize of output 204 [2023-01-27 21:28:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:28:24,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316356630] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:28:24,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:28:24,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 30 [2023-01-27 21:28:24,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074967959] [2023-01-27 21:28:24,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:28:24,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 21:28:24,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:28:24,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 21:28:24,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2023-01-27 21:28:24,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 267 [2023-01-27 21:28:24,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 228 transitions, 1706 flow. Second operand has 32 states, 32 states have (on average 74.90625) internal successors, (2397), 32 states have internal predecessors, (2397), 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) [2023-01-27 21:28:24,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:28:24,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 267 [2023-01-27 21:28:24,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:28:26,884 INFO L130 PetriNetUnfolder]: 2207/3813 cut-off events. [2023-01-27 21:28:26,884 INFO L131 PetriNetUnfolder]: For 3501/3501 co-relation queries the response was YES. [2023-01-27 21:28:26,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13509 conditions, 3813 events. 2207/3813 cut-off events. For 3501/3501 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22857 event pairs, 56 based on Foata normal form. 36/3849 useless extension candidates. Maximal degree in co-relation 12496. Up to 1073 conditions per place. [2023-01-27 21:28:26,902 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 319 selfloop transitions, 307 changer transitions 82/708 dead transitions. [2023-01-27 21:28:26,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 708 transitions, 6036 flow [2023-01-27 21:28:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-01-27 21:28:26,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-01-27 21:28:26,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3943 transitions. [2023-01-27 21:28:26,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2895645149445546 [2023-01-27 21:28:26,907 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3943 transitions. [2023-01-27 21:28:26,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3943 transitions. [2023-01-27 21:28:26,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:28:26,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3943 transitions. [2023-01-27 21:28:26,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 77.31372549019608) internal successors, (3943), 51 states have internal predecessors, (3943), 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) [2023-01-27 21:28:26,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 267.0) internal successors, (13884), 52 states have internal predecessors, (13884), 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) [2023-01-27 21:28:26,924 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 267.0) internal successors, (13884), 52 states have internal predecessors, (13884), 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) [2023-01-27 21:28:26,924 INFO L175 Difference]: Start difference. First operand has 129 places, 228 transitions, 1706 flow. Second operand 51 states and 3943 transitions. [2023-01-27 21:28:26,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 708 transitions, 6036 flow [2023-01-27 21:28:26,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 708 transitions, 5978 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-01-27 21:28:26,946 INFO L231 Difference]: Finished difference. Result has 183 places, 414 transitions, 4002 flow [2023-01-27 21:28:26,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=4002, PETRI_PLACES=183, PETRI_TRANSITIONS=414} [2023-01-27 21:28:26,947 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 161 predicate places. [2023-01-27 21:28:26,947 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 414 transitions, 4002 flow [2023-01-27 21:28:26,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 74.90625) internal successors, (2397), 32 states have internal predecessors, (2397), 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) [2023-01-27 21:28:26,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:28:26,948 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:28:26,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 21:28:27,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:28:27,153 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:28:27,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:28:27,153 INFO L85 PathProgramCache]: Analyzing trace with hash 365335128, now seen corresponding path program 8 times [2023-01-27 21:28:27,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:28:27,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979999887] [2023-01-27 21:28:27,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:28:27,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:28:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:28:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:28:27,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:28:27,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979999887] [2023-01-27 21:28:27,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979999887] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:28:27,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629710105] [2023-01-27 21:28:27,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:28:27,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:28:27,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:28:27,933 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) [2023-01-27 21:28:27,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 21:28:28,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:28:28,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:28:28,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-27 21:28:28,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:28:28,307 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2023-01-27 21:28:28,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 15 [2023-01-27 21:28:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:28:28,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:28:28,877 INFO L321 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-01-27 21:28:28,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 258 treesize of output 204 [2023-01-27 21:28:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:28:29,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629710105] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:28:29,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:28:29,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 30 [2023-01-27 21:28:29,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465423536] [2023-01-27 21:28:29,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:28:29,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 21:28:29,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:28:29,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 21:28:29,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2023-01-27 21:28:29,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 267 [2023-01-27 21:28:29,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 414 transitions, 4002 flow. Second operand has 32 states, 32 states have (on average 74.90625) internal successors, (2397), 32 states have internal predecessors, (2397), 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) [2023-01-27 21:28:29,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:28:29,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 267 [2023-01-27 21:28:29,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:28:31,585 INFO L130 PetriNetUnfolder]: 3555/6063 cut-off events. [2023-01-27 21:28:31,585 INFO L131 PetriNetUnfolder]: For 11568/11568 co-relation queries the response was YES. [2023-01-27 21:28:31,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24993 conditions, 6063 events. 3555/6063 cut-off events. For 11568/11568 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 39781 event pairs, 80 based on Foata normal form. 34/6097 useless extension candidates. Maximal degree in co-relation 24895. Up to 2075 conditions per place. [2023-01-27 21:28:31,621 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 313 selfloop transitions, 466 changer transitions 78/857 dead transitions. [2023-01-27 21:28:31,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 857 transitions, 9113 flow [2023-01-27 21:28:31,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-27 21:28:31,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-27 21:28:31,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3403 transitions. [2023-01-27 21:28:31,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2896663261831801 [2023-01-27 21:28:31,625 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3403 transitions. [2023-01-27 21:28:31,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3403 transitions. [2023-01-27 21:28:31,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:28:31,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3403 transitions. [2023-01-27 21:28:31,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 77.3409090909091) internal successors, (3403), 44 states have internal predecessors, (3403), 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) [2023-01-27 21:28:31,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 267.0) internal successors, (12015), 45 states have internal predecessors, (12015), 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) [2023-01-27 21:28:31,637 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 267.0) internal successors, (12015), 45 states have internal predecessors, (12015), 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) [2023-01-27 21:28:31,637 INFO L175 Difference]: Start difference. First operand has 183 places, 414 transitions, 4002 flow. Second operand 44 states and 3403 transitions. [2023-01-27 21:28:31,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 857 transitions, 9113 flow [2023-01-27 21:28:31,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 857 transitions, 8808 flow, removed 96 selfloop flow, removed 14 redundant places. [2023-01-27 21:28:31,815 INFO L231 Difference]: Finished difference. Result has 219 places, 611 transitions, 7052 flow [2023-01-27 21:28:31,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=3777, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=7052, PETRI_PLACES=219, PETRI_TRANSITIONS=611} [2023-01-27 21:28:31,815 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 197 predicate places. [2023-01-27 21:28:31,815 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 611 transitions, 7052 flow [2023-01-27 21:28:31,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 74.90625) internal successors, (2397), 32 states have internal predecessors, (2397), 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) [2023-01-27 21:28:31,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:28:31,816 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:28:31,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-27 21:28:32,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-27 21:28:32,022 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:28:32,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:28:32,022 INFO L85 PathProgramCache]: Analyzing trace with hash -27716245, now seen corresponding path program 9 times [2023-01-27 21:28:32,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:28:32,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375258641] [2023-01-27 21:28:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:28:32,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:28:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:28:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:28:33,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:28:33,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375258641] [2023-01-27 21:28:33,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375258641] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:28:33,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186411384] [2023-01-27 21:28:33,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:28:33,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:28:33,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:28:33,197 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) [2023-01-27 21:28:33,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 21:28:33,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 21:28:33,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:28:33,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-27 21:28:33,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:28:33,583 INFO L321 Elim1Store]: treesize reduction 32, result has 17.9 percent of original size [2023-01-27 21:28:33,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 21 [2023-01-27 21:28:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:28:33,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:28:34,190 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-27 21:28:34,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 268 treesize of output 222 [2023-01-27 21:28:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:28:34,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186411384] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:28:34,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:28:34,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 33 [2023-01-27 21:28:34,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460970367] [2023-01-27 21:28:34,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:28:34,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 21:28:34,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:28:34,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 21:28:34,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2023-01-27 21:28:34,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 267 [2023-01-27 21:28:34,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 611 transitions, 7052 flow. Second operand has 35 states, 35 states have (on average 67.8) internal successors, (2373), 35 states have internal predecessors, (2373), 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) [2023-01-27 21:28:34,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:28:34,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 267 [2023-01-27 21:28:34,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:28:38,450 INFO L130 PetriNetUnfolder]: 6085/10306 cut-off events. [2023-01-27 21:28:38,450 INFO L131 PetriNetUnfolder]: For 31892/31892 co-relation queries the response was YES. [2023-01-27 21:28:38,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47509 conditions, 10306 events. 6085/10306 cut-off events. For 31892/31892 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 72815 event pairs, 224 based on Foata normal form. 59/10365 useless extension candidates. Maximal degree in co-relation 47403. Up to 3997 conditions per place. [2023-01-27 21:28:38,505 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 447 selfloop transitions, 808 changer transitions 98/1353 dead transitions. [2023-01-27 21:28:38,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 1353 transitions, 16882 flow [2023-01-27 21:28:38,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-01-27 21:28:38,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-01-27 21:28:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 4721 transitions. [2023-01-27 21:28:38,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26390519313544636 [2023-01-27 21:28:38,510 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 4721 transitions. [2023-01-27 21:28:38,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 4721 transitions. [2023-01-27 21:28:38,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:28:38,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 4721 transitions. [2023-01-27 21:28:38,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 70.46268656716418) internal successors, (4721), 67 states have internal predecessors, (4721), 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) [2023-01-27 21:28:38,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 267.0) internal successors, (18156), 68 states have internal predecessors, (18156), 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) [2023-01-27 21:28:38,526 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 267.0) internal successors, (18156), 68 states have internal predecessors, (18156), 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) [2023-01-27 21:28:38,526 INFO L175 Difference]: Start difference. First operand has 219 places, 611 transitions, 7052 flow. Second operand 67 states and 4721 transitions. [2023-01-27 21:28:38,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 1353 transitions, 16882 flow [2023-01-27 21:28:39,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 1353 transitions, 16410 flow, removed 153 selfloop flow, removed 25 redundant places. [2023-01-27 21:28:39,080 INFO L231 Difference]: Finished difference. Result has 280 places, 1000 transitions, 13853 flow [2023-01-27 21:28:39,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=6806, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=13853, PETRI_PLACES=280, PETRI_TRANSITIONS=1000} [2023-01-27 21:28:39,081 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 258 predicate places. [2023-01-27 21:28:39,081 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 1000 transitions, 13853 flow [2023-01-27 21:28:39,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 67.8) internal successors, (2373), 35 states have internal predecessors, (2373), 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) [2023-01-27 21:28:39,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:28:39,081 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:28:39,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-27 21:28:39,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:28:39,287 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:28:39,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:28:39,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1001792257, now seen corresponding path program 10 times [2023-01-27 21:28:39,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:28:39,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350621763] [2023-01-27 21:28:39,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:28:39,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:28:39,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:28:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-27 21:28:39,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:28:39,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350621763] [2023-01-27 21:28:39,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350621763] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:28:39,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782647028] [2023-01-27 21:28:39,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:28:39,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:28:39,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:28:39,541 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) [2023-01-27 21:28:39,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 21:28:39,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:28:39,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:28:39,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 21:28:39,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:28:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-27 21:28:40,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:28:40,360 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-01-27 21:28:40,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 243 treesize of output 177 [2023-01-27 21:28:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-27 21:28:40,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782647028] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:28:40,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:28:40,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-01-27 21:28:40,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024330873] [2023-01-27 21:28:40,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:28:40,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:28:40,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:28:40,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:28:40,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:28:40,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 267 [2023-01-27 21:28:40,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 1000 transitions, 13853 flow. Second operand has 19 states, 19 states have (on average 88.0) internal successors, (1672), 19 states have internal predecessors, (1672), 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) [2023-01-27 21:28:40,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:28:40,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 267 [2023-01-27 21:28:40,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:28:42,361 INFO L130 PetriNetUnfolder]: 5107/8641 cut-off events. [2023-01-27 21:28:42,362 INFO L131 PetriNetUnfolder]: For 42320/42320 co-relation queries the response was YES. [2023-01-27 21:28:42,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44976 conditions, 8641 events. 5107/8641 cut-off events. For 42320/42320 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 58938 event pairs, 2540 based on Foata normal form. 30/8671 useless extension candidates. Maximal degree in co-relation 44890. Up to 8486 conditions per place. [2023-01-27 21:28:42,431 INFO L137 encePairwiseOnDemand]: 262/267 looper letters, 867 selfloop transitions, 4 changer transitions 31/902 dead transitions. [2023-01-27 21:28:42,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 902 transitions, 14252 flow [2023-01-27 21:28:42,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 21:28:42,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 21:28:42,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 816 transitions. [2023-01-27 21:28:42,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33957553058676654 [2023-01-27 21:28:42,432 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 816 transitions. [2023-01-27 21:28:42,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 816 transitions. [2023-01-27 21:28:42,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:28:42,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 816 transitions. [2023-01-27 21:28:42,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 90.66666666666667) internal successors, (816), 9 states have internal predecessors, (816), 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) [2023-01-27 21:28:42,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 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) [2023-01-27 21:28:42,435 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 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) [2023-01-27 21:28:42,435 INFO L175 Difference]: Start difference. First operand has 280 places, 1000 transitions, 13853 flow. Second operand 9 states and 816 transitions. [2023-01-27 21:28:42,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 902 transitions, 14252 flow [2023-01-27 21:28:43,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 902 transitions, 13737 flow, removed 156 selfloop flow, removed 23 redundant places. [2023-01-27 21:28:43,258 INFO L231 Difference]: Finished difference. Result has 259 places, 871 transitions, 11681 flow [2023-01-27 21:28:43,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=11870, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=886, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11681, PETRI_PLACES=259, PETRI_TRANSITIONS=871} [2023-01-27 21:28:43,259 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 237 predicate places. [2023-01-27 21:28:43,259 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 871 transitions, 11681 flow [2023-01-27 21:28:43,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 88.0) internal successors, (1672), 19 states have internal predecessors, (1672), 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) [2023-01-27 21:28:43,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:28:43,260 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:28:43,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-01-27 21:28:43,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-27 21:28:43,464 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:28:43,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:28:43,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1446606786, now seen corresponding path program 11 times [2023-01-27 21:28:43,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:28:43,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959744508] [2023-01-27 21:28:43,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:28:43,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:28:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:28:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:28:44,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:28:44,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959744508] [2023-01-27 21:28:44,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959744508] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:28:44,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750278198] [2023-01-27 21:28:44,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:28:44,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:28:44,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:28:44,819 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) [2023-01-27 21:28:44,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 21:28:44,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 21:28:44,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:28:44,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 65 conjunts are in the unsatisfiable core [2023-01-27 21:28:44,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:28:45,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-27 21:28:45,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:28:45,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:28:45,728 INFO L321 Elim1Store]: treesize reduction 77, result has 11.5 percent of original size [2023-01-27 21:28:45,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 73 treesize of output 29 [2023-01-27 21:28:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:28:45,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:28:48,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:28:48,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2023-01-27 21:28:48,245 INFO L321 Elim1Store]: treesize reduction 26, result has 70.1 percent of original size [2023-01-27 21:28:48,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 792 treesize of output 748 [2023-01-27 21:28:48,265 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:28:48,268 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:28:48,269 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:28:48,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:28:48,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 256 treesize of output 276 [2023-01-27 21:28:48,344 INFO L321 Elim1Store]: treesize reduction 26, result has 70.1 percent of original size [2023-01-27 21:28:48,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 255 treesize of output 235 [2023-01-27 21:28:49,813 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:28:49,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2023-01-27 21:28:49,845 INFO L321 Elim1Store]: treesize reduction 74, result has 14.9 percent of original size [2023-01-27 21:28:49,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 376 treesize of output 336 [2023-01-27 21:28:49,888 INFO L321 Elim1Store]: treesize reduction 74, result has 14.9 percent of original size [2023-01-27 21:28:49,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 256 [2023-01-27 21:28:49,920 INFO L321 Elim1Store]: treesize reduction 74, result has 14.9 percent of original size [2023-01-27 21:28:49,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 187 [2023-01-27 21:28:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:28:50,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750278198] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:28:50,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:28:50,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 46 [2023-01-27 21:28:50,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011226835] [2023-01-27 21:28:50,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:28:50,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-01-27 21:28:50,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:28:50,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-01-27 21:28:50,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2024, Unknown=3, NotChecked=0, Total=2256 [2023-01-27 21:28:50,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 267 [2023-01-27 21:28:50,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 871 transitions, 11681 flow. Second operand has 48 states, 48 states have (on average 67.52083333333333) internal successors, (3241), 48 states have internal predecessors, (3241), 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) [2023-01-27 21:28:50,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:28:50,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 267 [2023-01-27 21:28:50,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:29:47,881 WARN L222 SmtUtils]: Spent 7.01s on a formula simplification. DAG size of input: 95 DAG size of output: 93 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 21:30:15,821 WARN L222 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 98 DAG size of output: 96 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 21:30:22,695 WARN L222 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 98 DAG size of output: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 21:30:39,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:30:57,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:31:12,745 WARN L222 SmtUtils]: Spent 5.43s on a formula simplification. DAG size of input: 97 DAG size of output: 94 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 21:31:44,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:31:57,893 WARN L222 SmtUtils]: Spent 5.96s on a formula simplification. DAG size of input: 100 DAG size of output: 97 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 21:32:36,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:32:42,159 WARN L222 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 130 DAG size of output: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 21:32:53,087 WARN L222 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 162 DAG size of output: 160 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 21:32:59,902 WARN L222 SmtUtils]: Spent 6.45s on a formula simplification. DAG size of input: 155 DAG size of output: 153 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 21:33:11,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:33:22,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:33:25,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:33:47,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:34:31,796 WARN L222 SmtUtils]: Spent 6.34s on a formula simplification. DAG size of input: 127 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 21:36:27,347 INFO L130 PetriNetUnfolder]: 19539/33571 cut-off events. [2023-01-27 21:36:27,347 INFO L131 PetriNetUnfolder]: For 155025/155025 co-relation queries the response was YES. [2023-01-27 21:36:27,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162289 conditions, 33571 events. 19539/33571 cut-off events. For 155025/155025 co-relation queries the response was YES. Maximal size of possible extension queue 1123. Compared 264555 event pairs, 812 based on Foata normal form. 777/34348 useless extension candidates. Maximal degree in co-relation 162214. Up to 12049 conditions per place. [2023-01-27 21:36:27,926 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 2361 selfloop transitions, 3243 changer transitions 706/6310 dead transitions. [2023-01-27 21:36:27,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 6310 transitions, 72983 flow [2023-01-27 21:36:27,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 527 states. [2023-01-27 21:36:27,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2023-01-27 21:36:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 37728 transitions. [2023-01-27 21:36:27,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2681278383045861 [2023-01-27 21:36:27,997 INFO L72 ComplementDD]: Start complementDD. Operand 527 states and 37728 transitions. [2023-01-27 21:36:27,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 527 states and 37728 transitions. [2023-01-27 21:36:28,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:36:28,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 527 states and 37728 transitions. [2023-01-27 21:36:28,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 528 states, 527 states have (on average 71.59013282732448) internal successors, (37728), 527 states have internal predecessors, (37728), 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) [2023-01-27 21:36:28,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 528 states, 528 states have (on average 267.0) internal successors, (140976), 528 states have internal predecessors, (140976), 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) [2023-01-27 21:36:28,164 INFO L81 ComplementDD]: Finished complementDD. Result has 528 states, 528 states have (on average 267.0) internal successors, (140976), 528 states have internal predecessors, (140976), 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) [2023-01-27 21:36:28,164 INFO L175 Difference]: Start difference. First operand has 259 places, 871 transitions, 11681 flow. Second operand 527 states and 37728 transitions. [2023-01-27 21:36:28,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 6310 transitions, 72983 flow [2023-01-27 21:36:30,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 739 places, 6310 transitions, 72675 flow, removed 97 selfloop flow, removed 25 redundant places. [2023-01-27 21:36:30,597 INFO L231 Difference]: Finished difference. Result has 927 places, 4249 transitions, 61806 flow [2023-01-27 21:36:30,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=11519, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=527, PETRI_FLOW=61806, PETRI_PLACES=927, PETRI_TRANSITIONS=4249} [2023-01-27 21:36:30,598 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 905 predicate places. [2023-01-27 21:36:30,598 INFO L495 AbstractCegarLoop]: Abstraction has has 927 places, 4249 transitions, 61806 flow [2023-01-27 21:36:30,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 67.52083333333333) internal successors, (3241), 48 states have internal predecessors, (3241), 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) [2023-01-27 21:36:30,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:36:30,599 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:36:30,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-01-27 21:36:30,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-27 21:36:30,804 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:36:30,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:36:30,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1656530734, now seen corresponding path program 12 times [2023-01-27 21:36:30,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:36:30,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747760688] [2023-01-27 21:36:30,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:36:30,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:36:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:36:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:36:32,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:36:32,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747760688] [2023-01-27 21:36:32,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747760688] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:36:32,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909160894] [2023-01-27 21:36:32,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:36:32,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:36:32,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:36:32,341 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) [2023-01-27 21:36:32,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-27 21:36:32,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:36:32,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:36:32,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 59 conjunts are in the unsatisfiable core [2023-01-27 21:36:32,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:36:33,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:36:33,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:36:33,275 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:36:33,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:36:33,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 18 [2023-01-27 21:36:33,357 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:36:33,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:36:34,426 INFO L321 Elim1Store]: treesize reduction 44, result has 57.3 percent of original size [2023-01-27 21:36:34,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 310 treesize of output 250 [2023-01-27 21:36:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:36:35,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909160894] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:36:35,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:36:35,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 49 [2023-01-27 21:36:35,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377964511] [2023-01-27 21:36:35,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:36:35,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-01-27 21:36:35,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:36:35,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-01-27 21:36:35,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2196, Unknown=0, NotChecked=0, Total=2550 [2023-01-27 21:36:35,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 267 [2023-01-27 21:36:35,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 927 places, 4249 transitions, 61806 flow. Second operand has 51 states, 51 states have (on average 67.45098039215686) internal successors, (3440), 51 states have internal predecessors, (3440), 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) [2023-01-27 21:36:35,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:36:35,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 267 [2023-01-27 21:36:35,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:24,586 INFO L130 PetriNetUnfolder]: 28861/49641 cut-off events. [2023-01-27 21:37:24,586 INFO L131 PetriNetUnfolder]: For 1850000/1850000 co-relation queries the response was YES. [2023-01-27 21:37:26,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314041 conditions, 49641 events. 28861/49641 cut-off events. For 1850000/1850000 co-relation queries the response was YES. Maximal size of possible extension queue 1941. Compared 425116 event pairs, 1012 based on Foata normal form. 60/49701 useless extension candidates. Maximal degree in co-relation 312487. Up to 20049 conditions per place. [2023-01-27 21:37:26,711 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 3360 selfloop transitions, 4127 changer transitions 139/7626 dead transitions. [2023-01-27 21:37:26,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1037 places, 7626 transitions, 123756 flow [2023-01-27 21:37:26,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-01-27 21:37:26,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2023-01-27 21:37:26,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 8735 transitions. [2023-01-27 21:37:26,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26383351455841486 [2023-01-27 21:37:26,718 INFO L72 ComplementDD]: Start complementDD. Operand 124 states and 8735 transitions. [2023-01-27 21:37:26,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 124 states and 8735 transitions. [2023-01-27 21:37:26,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:26,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 124 states and 8735 transitions. [2023-01-27 21:37:26,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 125 states, 124 states have (on average 70.44354838709677) internal successors, (8735), 124 states have internal predecessors, (8735), 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) [2023-01-27 21:37:26,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 125 states, 125 states have (on average 267.0) internal successors, (33375), 125 states have internal predecessors, (33375), 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) [2023-01-27 21:37:26,744 INFO L81 ComplementDD]: Finished complementDD. Result has 125 states, 125 states have (on average 267.0) internal successors, (33375), 125 states have internal predecessors, (33375), 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) [2023-01-27 21:37:26,744 INFO L175 Difference]: Start difference. First operand has 927 places, 4249 transitions, 61806 flow. Second operand 124 states and 8735 transitions. [2023-01-27 21:37:26,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1037 places, 7626 transitions, 123756 flow [2023-01-27 21:38:48,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1012 places, 7626 transitions, 113476 flow, removed 5097 selfloop flow, removed 25 redundant places. [2023-01-27 21:38:48,777 INFO L231 Difference]: Finished difference. Result has 1061 places, 5940 transitions, 97333 flow [2023-01-27 21:38:48,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=56680, PETRI_DIFFERENCE_MINUEND_PLACES=889, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2565, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=124, PETRI_FLOW=97333, PETRI_PLACES=1061, PETRI_TRANSITIONS=5940} [2023-01-27 21:38:48,780 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1039 predicate places. [2023-01-27 21:38:48,780 INFO L495 AbstractCegarLoop]: Abstraction has has 1061 places, 5940 transitions, 97333 flow [2023-01-27 21:38:48,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 67.45098039215686) internal successors, (3440), 51 states have internal predecessors, (3440), 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) [2023-01-27 21:38:48,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:48,781 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:48,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-27 21:38:48,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-27 21:38:48,986 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:48,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:48,987 INFO L85 PathProgramCache]: Analyzing trace with hash 225616056, now seen corresponding path program 13 times [2023-01-27 21:38:48,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:48,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926714115] [2023-01-27 21:38:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:48,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:50,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:50,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926714115] [2023-01-27 21:38:50,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926714115] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:50,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058165724] [2023-01-27 21:38:50,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:38:50,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:50,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:50,028 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) [2023-01-27 21:38:50,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-27 21:38:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:50,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-27 21:38:50,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:50,755 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:38:50,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 12 [2023-01-27 21:38:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:50,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:51,858 INFO L321 Elim1Store]: treesize reduction 44, result has 57.3 percent of original size [2023-01-27 21:38:51,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 310 treesize of output 250 [2023-01-27 21:38:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:53,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058165724] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:53,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:53,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 49 [2023-01-27 21:38:53,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870408013] [2023-01-27 21:38:53,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:53,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-01-27 21:38:53,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:53,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-01-27 21:38:53,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=2197, Unknown=0, NotChecked=0, Total=2550 [2023-01-27 21:38:53,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 267 [2023-01-27 21:38:53,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1061 places, 5940 transitions, 97333 flow. Second operand has 51 states, 51 states have (on average 74.45098039215686) internal successors, (3797), 51 states have internal predecessors, (3797), 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) [2023-01-27 21:38:53,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:53,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 267 [2023-01-27 21:38:53,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:39:55,114 INFO L130 PetriNetUnfolder]: 31721/54578 cut-off events. [2023-01-27 21:39:55,115 INFO L131 PetriNetUnfolder]: For 2064106/2064106 co-relation queries the response was YES. [2023-01-27 21:39:57,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361404 conditions, 54578 events. 31721/54578 cut-off events. For 2064106/2064106 co-relation queries the response was YES. Maximal size of possible extension queue 1725. Compared 471184 event pairs, 1136 based on Foata normal form. 133/54711 useless extension candidates. Maximal degree in co-relation 361134. Up to 15179 conditions per place. [2023-01-27 21:39:58,074 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 3108 selfloop transitions, 4505 changer transitions 188/7801 dead transitions. [2023-01-27 21:39:58,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1091 places, 7801 transitions, 134521 flow [2023-01-27 21:39:58,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-01-27 21:39:58,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2023-01-27 21:39:58,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 6823 transitions. [2023-01-27 21:39:58,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2903898535921008 [2023-01-27 21:39:58,080 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 6823 transitions. [2023-01-27 21:39:58,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 6823 transitions. [2023-01-27 21:39:58,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:39:58,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 6823 transitions. [2023-01-27 21:39:58,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 77.5340909090909) internal successors, (6823), 88 states have internal predecessors, (6823), 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) [2023-01-27 21:39:58,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 267.0) internal successors, (23763), 89 states have internal predecessors, (23763), 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) [2023-01-27 21:39:58,112 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 267.0) internal successors, (23763), 89 states have internal predecessors, (23763), 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) [2023-01-27 21:39:58,112 INFO L175 Difference]: Start difference. First operand has 1061 places, 5940 transitions, 97333 flow. Second operand 88 states and 6823 transitions. [2023-01-27 21:39:58,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1091 places, 7801 transitions, 134521 flow [2023-01-27 21:41:40,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1031 places, 7801 transitions, 131717 flow, removed 1318 selfloop flow, removed 60 redundant places. [2023-01-27 21:41:40,542 INFO L231 Difference]: Finished difference. Result has 1061 places, 6167 transitions, 115359 flow [2023-01-27 21:41:40,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=74490, PETRI_DIFFERENCE_MINUEND_PLACES=944, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=115359, PETRI_PLACES=1061, PETRI_TRANSITIONS=6167} [2023-01-27 21:41:40,546 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1039 predicate places. [2023-01-27 21:41:40,546 INFO L495 AbstractCegarLoop]: Abstraction has has 1061 places, 6167 transitions, 115359 flow [2023-01-27 21:41:40,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 74.45098039215686) internal successors, (3797), 51 states have internal predecessors, (3797), 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) [2023-01-27 21:41:40,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:41:40,547 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:41:40,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-01-27 21:41:40,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-27 21:41:40,755 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:41:40,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:41:40,755 INFO L85 PathProgramCache]: Analyzing trace with hash 443297970, now seen corresponding path program 14 times [2023-01-27 21:41:40,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:41:40,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841222470] [2023-01-27 21:41:40,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:41:40,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:41:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:41:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:41:41,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:41:41,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841222470] [2023-01-27 21:41:41,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841222470] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:41:41,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377909197] [2023-01-27 21:41:41,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:41:41,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:41:41,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:41:41,881 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) [2023-01-27 21:41:41,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-27 21:41:41,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:41:41,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:41:41,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 59 conjunts are in the unsatisfiable core [2023-01-27 21:41:41,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:41:42,574 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:41:42,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 12 [2023-01-27 21:41:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:41:42,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:41:43,587 INFO L321 Elim1Store]: treesize reduction 28, result has 72.8 percent of original size [2023-01-27 21:41:43,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 320 treesize of output 276 [2023-01-27 21:41:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:41:45,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377909197] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:41:45,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:41:45,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 47 [2023-01-27 21:41:45,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249310350] [2023-01-27 21:41:45,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:41:45,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-01-27 21:41:45,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:41:45,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-01-27 21:41:45,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=2010, Unknown=0, NotChecked=0, Total=2352 [2023-01-27 21:41:45,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 267 [2023-01-27 21:41:45,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1061 places, 6167 transitions, 115359 flow. Second operand has 49 states, 49 states have (on average 74.48979591836735) internal successors, (3650), 49 states have internal predecessors, (3650), 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) [2023-01-27 21:41:45,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:41:45,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 267 [2023-01-27 21:41:45,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-01-27 21:41:52,306 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 [2023-01-27 21:41:52,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-01-27 21:41:52,314 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 21:41:52,321 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 21:41:52,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-27 21:41:52,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:41:52,519 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 73/267 universal loopers) in iteration 17,while PetriNetUnfolder was constructing finite prefix that currently has 6298 conditions, 1174 events (588/1173 cut-off events. For 10061/10061 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 8648 event pairs, 49 based on Foata normal form. 17/1576 useless extension candidates. Maximal degree in co-relation 6035. Up to 340 conditions per place.). [2023-01-27 21:41:52,520 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 21:41:52,520 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 21:41:52,521 INFO L445 BasicCegarLoop]: Path program histogram: [14, 1, 1, 1] [2023-01-27 21:41:52,523 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 21:41:52,523 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 21:41:52,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 09:41:52 BasicIcfg [2023-01-27 21:41:52,524 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 21:41:52,524 INFO L158 Benchmark]: Toolchain (without parser) took 843724.16ms. Allocated memory was 652.2MB in the beginning and 8.6GB in the end (delta: 7.9GB). Free memory was 613.5MB in the beginning and 6.0GB in the end (delta: -5.3GB). Peak memory consumption was 5.3GB. Max. memory is 16.0GB. [2023-01-27 21:41:52,524 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 400.6MB. Free memory is still 350.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 21:41:52,525 INFO L158 Benchmark]: CACSL2BoogieTranslator took 173.07ms. Allocated memory is still 652.2MB. Free memory was 613.5MB in the beginning and 601.8MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-27 21:41:52,525 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.57ms. Allocated memory is still 652.2MB. Free memory was 601.8MB in the beginning and 599.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 21:41:52,525 INFO L158 Benchmark]: Boogie Preprocessor took 29.85ms. Allocated memory is still 652.2MB. Free memory was 599.7MB in the beginning and 598.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 21:41:52,525 INFO L158 Benchmark]: RCFGBuilder took 389.04ms. Allocated memory is still 652.2MB. Free memory was 598.1MB in the beginning and 577.9MB in the end (delta: 20.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-01-27 21:41:52,525 INFO L158 Benchmark]: TraceAbstraction took 843093.70ms. Allocated memory was 652.2MB in the beginning and 8.6GB in the end (delta: 7.9GB). Free memory was 577.5MB in the beginning and 6.0GB in the end (delta: -5.4GB). Peak memory consumption was 5.3GB. Max. memory is 16.0GB. [2023-01-27 21:41:52,526 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 400.6MB. Free memory is still 350.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 173.07ms. Allocated memory is still 652.2MB. Free memory was 613.5MB in the beginning and 601.8MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 34.57ms. Allocated memory is still 652.2MB. Free memory was 601.8MB in the beginning and 599.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 29.85ms. Allocated memory is still 652.2MB. Free memory was 599.7MB in the beginning and 598.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 389.04ms. Allocated memory is still 652.2MB. Free memory was 598.1MB in the beginning and 577.9MB in the end (delta: 20.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 843093.70ms. Allocated memory was 652.2MB in the beginning and 8.6GB in the end (delta: 7.9GB). Free memory was 577.5MB in the beginning and 6.0GB in the end (delta: -5.4GB). Peak memory consumption was 5.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.3s, 121 PlacesBefore, 22 PlacesAfterwards, 125 TransitionsBefore, 19 TransitionsAfterwards, 1296 CoEnabledTransitionPairs, 7 FixpointIterations, 65 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 13 TrivialYvCompositions, 15 ConcurrentYvCompositions, 7 ChoiceCompositions, 132 TotalNumberOfCompositions, 1508 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1410, independent: 1392, independent conditional: 0, independent unconditional: 1392, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 762, independent: 755, independent conditional: 0, independent unconditional: 755, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1410, independent: 637, independent conditional: 0, independent unconditional: 637, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 762, unknown conditional: 0, unknown unconditional: 762] , Statistics on independence cache: Total cache size (in pairs): 28, Positive cache size: 26, Positive conditional cache size: 0, Positive unconditional cache size: 26, 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 - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 73/267 universal loopers) in iteration 17,while PetriNetUnfolder was constructing finite prefix that currently has 6298 conditions, 1174 events (588/1173 cut-off events. For 10061/10061 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 8648 event pairs, 49 based on Foata normal form. 17/1576 useless extension candidates. Maximal degree in co-relation 6035. Up to 340 conditions per place.). - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 73/267 universal loopers) in iteration 17,while PetriNetUnfolder was constructing finite prefix that currently has 6298 conditions, 1174 events (588/1173 cut-off events. For 10061/10061 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 8648 event pairs, 49 based on Foata normal form. 17/1576 useless extension candidates. Maximal degree in co-relation 6035. Up to 340 conditions per place.). - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 73/267 universal loopers) in iteration 17,while PetriNetUnfolder was constructing finite prefix that currently has 6298 conditions, 1174 events (588/1173 cut-off events. For 10061/10061 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 8648 event pairs, 49 based on Foata normal form. 17/1576 useless extension candidates. Maximal degree in co-relation 6035. Up to 340 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 161 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: 843.0s, OverallIterations: 17, TraceHistogramMax: 4, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 801.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.4s, HoareTripleCheckerStatistics: 17 mSolverCounterUnknown, 4526 SdHoareTripleChecker+Valid, 40.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4526 mSDsluCounter, 169 SdHoareTripleChecker+Invalid, 38.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 216 IncrementalHoareTripleChecker+Unchecked, 156 mSDsCounter, 803 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 20942 IncrementalHoareTripleChecker+Invalid, 21978 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 803 mSolverCounterUnsat, 13 mSDtfsCounter, 20942 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1720 GetRequests, 342 SyntacticMatches, 12 SemanticMatches, 1366 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 164292 ImplicationChecksByTransitivity, 471.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115359occurred in iteration=16, InterpolantAutomatonStates: 1061, 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, 1.1s SatisfiabilityAnalysisTime, 33.2s InterpolantComputationTime, 679 NumberOfCodeBlocks, 679 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 950 ConstructedInterpolants, 16 QuantifiedInterpolants, 20861 SizeOfPredicates, 359 NumberOfNonLiveVariables, 2916 ConjunctsInSsa, 491 ConjunctsInUnsatCore, 45 InterpolantComputations, 3 PerfectInterpolantSequences, 142/540 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown