/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum-alt2.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:17:52,788 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:17:52,845 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:17:52,849 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:17:52,849 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:17:52,850 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:17:52,850 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:17:52,870 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:17:52,871 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:17:52,871 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:17:52,871 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:17:52,871 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:17:52,872 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:17:52,872 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:17:52,872 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:17:52,878 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:17:52,878 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:17:52,880 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:17:52,880 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:17:52,881 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:17:52,881 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:17:52,882 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:17:52,882 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:17:52,882 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:17:52,882 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:17:52,882 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:17:52,882 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:17:52,883 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:17:52,883 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:17:52,883 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:17:52,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:17:52,884 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:17:52,884 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:17:52,884 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:17:52,884 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:17:52,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:17:52,884 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:17:52,884 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:17:52,885 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:17:52,885 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:17:52,885 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:17:52,885 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:17:53,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:17:53,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:17:53,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:17:53,096 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:17:53,097 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:17:53,098 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum-alt2.wvr_bound2.c [2023-08-04 09:17:54,155 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:17:54,312 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:17:54,312 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum-alt2.wvr_bound2.c [2023-08-04 09:17:54,318 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/407724e3d/4ff90a38e9644b32b0f0e779e3877e4d/FLAGb54b8f95b [2023-08-04 09:17:54,329 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/407724e3d/4ff90a38e9644b32b0f0e779e3877e4d [2023-08-04 09:17:54,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:17:54,332 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:17:54,332 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:17:54,333 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:17:54,337 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:17:54,338 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:17:54" (1/1) ... [2023-08-04 09:17:54,339 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15d9b3d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:54, skipping insertion in model container [2023-08-04 09:17:54,339 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:17:54" (1/1) ... [2023-08-04 09:17:54,359 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:17:54,483 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum-alt2.wvr_bound2.c[2768,2781] [2023-08-04 09:17:54,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:17:54,496 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:17:54,516 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum-alt2.wvr_bound2.c[2768,2781] [2023-08-04 09:17:54,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:17:54,530 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:17:54,530 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:17:54,536 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:17:54,537 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:54 WrapperNode [2023-08-04 09:17:54,537 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:17:54,538 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:17:54,538 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:17:54,538 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:17:54,543 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:54" (1/1) ... [2023-08-04 09:17:54,551 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:54" (1/1) ... [2023-08-04 09:17:54,574 INFO L138 Inliner]: procedures = 25, calls = 45, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 242 [2023-08-04 09:17:54,575 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:17:54,575 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:17:54,576 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:17:54,576 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:17:54,583 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:54" (1/1) ... [2023-08-04 09:17:54,583 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:54" (1/1) ... [2023-08-04 09:17:54,589 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:54" (1/1) ... [2023-08-04 09:17:54,589 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:54" (1/1) ... [2023-08-04 09:17:54,596 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:54" (1/1) ... [2023-08-04 09:17:54,600 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:54" (1/1) ... [2023-08-04 09:17:54,602 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:54" (1/1) ... [2023-08-04 09:17:54,603 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:54" (1/1) ... [2023-08-04 09:17:54,609 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:17:54,610 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:17:54,610 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:17:54,610 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:17:54,611 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:54" (1/1) ... [2023-08-04 09:17:54,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:17:54,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:17:54,651 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) [2023-08-04 09:17:54,668 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 [2023-08-04 09:17:54,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:17:54,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:17:54,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:17:54,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:17:54,694 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:17:54,695 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:17:54,695 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:17:54,695 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:17:54,695 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:17:54,696 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:17:54,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:17:54,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:17:54,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:17:54,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:17:54,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:17:54,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:17:54,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:17:54,699 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 09:17:54,794 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:17:54,795 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:17:55,032 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:17:55,155 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:17:55,155 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-04 09:17:55,157 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:17:55 BoogieIcfgContainer [2023-08-04 09:17:55,157 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:17:55,158 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:17:55,158 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:17:55,161 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:17:55,161 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:17:54" (1/3) ... [2023-08-04 09:17:55,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7d622d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:17:55, skipping insertion in model container [2023-08-04 09:17:55,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:54" (2/3) ... [2023-08-04 09:17:55,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7d622d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:17:55, skipping insertion in model container [2023-08-04 09:17:55,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:17:55" (3/3) ... [2023-08-04 09:17:55,170 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-array-sum-alt2.wvr_bound2.c [2023-08-04 09:17:55,176 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:17:55,183 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:17:55,183 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:17:55,183 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:17:55,259 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:17:55,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 192 transitions, 426 flow [2023-08-04 09:17:55,417 INFO L124 PetriNetUnfolderBase]: 101/660 cut-off events. [2023-08-04 09:17:55,417 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:17:55,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 660 events. 101/660 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3225 event pairs, 0 based on Foata normal form. 0/549 useless extension candidates. Maximal degree in co-relation 373. Up to 16 conditions per place. [2023-08-04 09:17:55,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 192 transitions, 426 flow [2023-08-04 09:17:55,431 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 192 transitions, 426 flow [2023-08-04 09:17:55,433 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:17:55,442 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 192 transitions, 426 flow [2023-08-04 09:17:55,445 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 192 transitions, 426 flow [2023-08-04 09:17:55,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 192 transitions, 426 flow [2023-08-04 09:17:55,520 INFO L124 PetriNetUnfolderBase]: 101/660 cut-off events. [2023-08-04 09:17:55,520 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:17:55,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 660 events. 101/660 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3225 event pairs, 0 based on Foata normal form. 0/549 useless extension candidates. Maximal degree in co-relation 373. Up to 16 conditions per place. [2023-08-04 09:17:55,533 INFO L119 LiptonReduction]: Number of co-enabled transitions 5220 [2023-08-04 09:17:59,609 INFO L134 LiptonReduction]: Checked pairs total: 8556 [2023-08-04 09:17:59,609 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-04 09:17:59,618 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:17:59,622 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=true, 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;@3881024b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:17:59,622 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:17:59,625 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:17:59,625 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2023-08-04 09:17:59,625 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:17:59,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:17:59,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:17:59,626 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:17:59,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:17:59,629 INFO L85 PathProgramCache]: Analyzing trace with hash -156566546, now seen corresponding path program 1 times [2023-08-04 09:17:59,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:17:59,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628106377] [2023-08-04 09:17:59,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:59,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:17:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:17:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:17:59,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:17:59,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628106377] [2023-08-04 09:17:59,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628106377] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:17:59,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:17:59,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:17:59,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690407262] [2023-08-04 09:17:59,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:17:59,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:17:59,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:17:59,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:17:59,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:17:59,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 359 [2023-08-04 09:17:59,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 49 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 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) [2023-08-04 09:17:59,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:17:59,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 359 [2023-08-04 09:17:59,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:18:00,115 INFO L124 PetriNetUnfolderBase]: 2189/3068 cut-off events. [2023-08-04 09:18:00,115 INFO L125 PetriNetUnfolderBase]: For 191/191 co-relation queries the response was YES. [2023-08-04 09:18:00,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6193 conditions, 3068 events. 2189/3068 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13999 event pairs, 825 based on Foata normal form. 0/1757 useless extension candidates. Maximal degree in co-relation 4980. Up to 2908 conditions per place. [2023-08-04 09:18:00,128 INFO L140 encePairwiseOnDemand]: 355/359 looper letters, 39 selfloop transitions, 2 changer transitions 4/51 dead transitions. [2023-08-04 09:18:00,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 228 flow [2023-08-04 09:18:00,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:18:00,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:18:00,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-04 09:18:00,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4809656453110492 [2023-08-04 09:18:00,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-04 09:18:00,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-04 09:18:00,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:18:00,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-04 09:18:00,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 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) [2023-08-04 09:18:00,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 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) [2023-08-04 09:18:00,166 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 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) [2023-08-04 09:18:00,168 INFO L175 Difference]: Start difference. First operand has 43 places, 49 transitions, 140 flow. Second operand 3 states and 518 transitions. [2023-08-04 09:18:00,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 228 flow [2023-08-04 09:18:00,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:18:00,173 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 134 flow [2023-08-04 09:18:00,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-04 09:18:00,177 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-08-04 09:18:00,177 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 134 flow [2023-08-04 09:18:00,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 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) [2023-08-04 09:18:00,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:18:00,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:18:00,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:18:00,178 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:18:00,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:18:00,179 INFO L85 PathProgramCache]: Analyzing trace with hash -182131176, now seen corresponding path program 1 times [2023-08-04 09:18:00,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:18:00,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524383819] [2023-08-04 09:18:00,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:18:00,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:18:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:18:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:18:00,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:18:00,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524383819] [2023-08-04 09:18:00,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524383819] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:18:00,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752003346] [2023-08-04 09:18:00,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:18:00,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:18:00,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:18:00,282 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) [2023-08-04 09:18:00,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 09:18:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:18:00,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:18:00,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:18:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:18:00,397 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:18:00,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752003346] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:18:00,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:18:00,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:18:00,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690671464] [2023-08-04 09:18:00,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:18:00,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:18:00,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:18:00,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:18:00,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:18:00,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 359 [2023-08-04 09:18:00,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 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) [2023-08-04 09:18:00,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:18:00,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 359 [2023-08-04 09:18:00,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:18:00,650 INFO L124 PetriNetUnfolderBase]: 2097/2911 cut-off events. [2023-08-04 09:18:00,651 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2023-08-04 09:18:00,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5883 conditions, 2911 events. 2097/2911 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12850 event pairs, 804 based on Foata normal form. 0/1661 useless extension candidates. Maximal degree in co-relation 4671. Up to 2757 conditions per place. [2023-08-04 09:18:00,661 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 41 selfloop transitions, 2 changer transitions 1/50 dead transitions. [2023-08-04 09:18:00,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 232 flow [2023-08-04 09:18:00,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:18:00,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:18:00,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-08-04 09:18:00,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818941504178273 [2023-08-04 09:18:00,664 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-08-04 09:18:00,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-08-04 09:18:00,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:18:00,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-08-04 09:18:00,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 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) [2023-08-04 09:18:00,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 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) [2023-08-04 09:18:00,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 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) [2023-08-04 09:18:00,668 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 134 flow. Second operand 3 states and 519 transitions. [2023-08-04 09:18:00,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 232 flow [2023-08-04 09:18:00,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 216 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:18:00,671 INFO L231 Difference]: Finished difference. Result has 40 places, 45 transitions, 126 flow [2023-08-04 09:18:00,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=40, PETRI_TRANSITIONS=45} [2023-08-04 09:18:00,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2023-08-04 09:18:00,672 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 45 transitions, 126 flow [2023-08-04 09:18:00,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 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) [2023-08-04 09:18:00,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:18:00,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:18:00,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 09:18:00,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:18:00,877 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:18:00,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:18:00,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1391607644, now seen corresponding path program 1 times [2023-08-04 09:18:00,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:18:00,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453216102] [2023-08-04 09:18:00,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:18:00,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:18:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:18:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:18:00,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:18:00,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453216102] [2023-08-04 09:18:00,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453216102] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:18:00,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275481742] [2023-08-04 09:18:00,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:18:00,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:18:00,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:18:00,964 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) [2023-08-04 09:18:00,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 09:18:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:18:01,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:18:01,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:18:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:18:01,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:18:01,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275481742] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:18:01,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:18:01,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:18:01,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240633099] [2023-08-04 09:18:01,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:18:01,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:18:01,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:18:01,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:18:01,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:18:01,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 359 [2023-08-04 09:18:01,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 45 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 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) [2023-08-04 09:18:01,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:18:01,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 359 [2023-08-04 09:18:01,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:18:01,333 INFO L124 PetriNetUnfolderBase]: 2088/2902 cut-off events. [2023-08-04 09:18:01,333 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-04 09:18:01,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5874 conditions, 2902 events. 2088/2902 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12736 event pairs, 789 based on Foata normal form. 0/1679 useless extension candidates. Maximal degree in co-relation 3541. Up to 2638 conditions per place. [2023-08-04 09:18:01,351 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 43 selfloop transitions, 2 changer transitions 1/52 dead transitions. [2023-08-04 09:18:01,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 52 transitions, 232 flow [2023-08-04 09:18:01,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:18:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:18:01,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-08-04 09:18:01,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48375116063138346 [2023-08-04 09:18:01,353 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-08-04 09:18:01,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-08-04 09:18:01,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:18:01,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-08-04 09:18:01,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 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) [2023-08-04 09:18:01,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 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) [2023-08-04 09:18:01,357 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 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) [2023-08-04 09:18:01,357 INFO L175 Difference]: Start difference. First operand has 40 places, 45 transitions, 126 flow. Second operand 3 states and 521 transitions. [2023-08-04 09:18:01,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 52 transitions, 232 flow [2023-08-04 09:18:01,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:18:01,359 INFO L231 Difference]: Finished difference. Result has 41 places, 45 transitions, 130 flow [2023-08-04 09:18:01,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=41, PETRI_TRANSITIONS=45} [2023-08-04 09:18:01,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2023-08-04 09:18:01,360 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 45 transitions, 130 flow [2023-08-04 09:18:01,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 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) [2023-08-04 09:18:01,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:18:01,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:18:01,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 09:18:01,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 09:18:01,565 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:18:01,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:18:01,566 INFO L85 PathProgramCache]: Analyzing trace with hash 225736988, now seen corresponding path program 1 times [2023-08-04 09:18:01,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:18:01,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320210969] [2023-08-04 09:18:01,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:18:01,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:18:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:18:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:18:01,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:18:01,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320210969] [2023-08-04 09:18:01,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320210969] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:18:01,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311987889] [2023-08-04 09:18:01,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:18:01,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:18:01,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:18:01,605 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) [2023-08-04 09:18:01,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 09:18:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:18:01,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:18:01,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:18:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:18:01,680 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:18:01,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311987889] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:18:01,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:18:01,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:18:01,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479596720] [2023-08-04 09:18:01,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:18:01,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:18:01,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:18:01,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:18:01,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:18:01,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 359 [2023-08-04 09:18:01,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 45 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 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) [2023-08-04 09:18:01,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:18:01,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 359 [2023-08-04 09:18:01,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:18:01,857 INFO L124 PetriNetUnfolderBase]: 1350/1921 cut-off events. [2023-08-04 09:18:01,858 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-04 09:18:01,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3976 conditions, 1921 events. 1350/1921 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7834 event pairs, 492 based on Foata normal form. 0/1139 useless extension candidates. Maximal degree in co-relation 2261. Up to 1483 conditions per place. [2023-08-04 09:18:01,864 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 48 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-04 09:18:01,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 56 transitions, 258 flow [2023-08-04 09:18:01,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:18:01,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:18:01,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2023-08-04 09:18:01,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48746518105849584 [2023-08-04 09:18:01,866 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2023-08-04 09:18:01,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2023-08-04 09:18:01,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:18:01,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2023-08-04 09:18:01,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 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) [2023-08-04 09:18:01,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 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) [2023-08-04 09:18:01,869 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 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) [2023-08-04 09:18:01,869 INFO L175 Difference]: Start difference. First operand has 41 places, 45 transitions, 130 flow. Second operand 3 states and 525 transitions. [2023-08-04 09:18:01,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 56 transitions, 258 flow [2023-08-04 09:18:01,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 56 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:18:01,870 INFO L231 Difference]: Finished difference. Result has 42 places, 46 transitions, 138 flow [2023-08-04 09:18:01,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=42, PETRI_TRANSITIONS=46} [2023-08-04 09:18:01,871 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-08-04 09:18:01,871 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 46 transitions, 138 flow [2023-08-04 09:18:01,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 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) [2023-08-04 09:18:01,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:18:01,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:18:01,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 09:18:02,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:18:02,076 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:18:02,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:18:02,076 INFO L85 PathProgramCache]: Analyzing trace with hash -101947947, now seen corresponding path program 1 times [2023-08-04 09:18:02,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:18:02,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619697019] [2023-08-04 09:18:02,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:18:02,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:18:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:18:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:18:02,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:18:02,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619697019] [2023-08-04 09:18:02,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619697019] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:18:02,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103184405] [2023-08-04 09:18:02,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:18:02,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:18:02,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:18:02,133 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) [2023-08-04 09:18:02,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 09:18:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:18:02,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:18:02,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:18:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:18:02,260 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:18:02,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103184405] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:18:02,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:18:02,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:18:02,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808938578] [2023-08-04 09:18:02,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:18:02,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:18:02,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:18:02,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:18:02,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:18:02,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 359 [2023-08-04 09:18:02,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 46 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 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) [2023-08-04 09:18:02,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:18:02,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 359 [2023-08-04 09:18:02,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:18:02,399 INFO L124 PetriNetUnfolderBase]: 1121/1615 cut-off events. [2023-08-04 09:18:02,399 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2023-08-04 09:18:02,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3459 conditions, 1615 events. 1121/1615 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6343 event pairs, 454 based on Foata normal form. 0/1026 useless extension candidates. Maximal degree in co-relation 1983. Up to 1279 conditions per place. [2023-08-04 09:18:02,406 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 49 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-04 09:18:02,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 268 flow [2023-08-04 09:18:02,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:18:02,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:18:02,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2023-08-04 09:18:02,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48746518105849584 [2023-08-04 09:18:02,407 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2023-08-04 09:18:02,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2023-08-04 09:18:02,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:18:02,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2023-08-04 09:18:02,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 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) [2023-08-04 09:18:02,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 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) [2023-08-04 09:18:02,410 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 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) [2023-08-04 09:18:02,410 INFO L175 Difference]: Start difference. First operand has 42 places, 46 transitions, 138 flow. Second operand 3 states and 525 transitions. [2023-08-04 09:18:02,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 268 flow [2023-08-04 09:18:02,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:18:02,413 INFO L231 Difference]: Finished difference. Result has 44 places, 47 transitions, 148 flow [2023-08-04 09:18:02,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=44, PETRI_TRANSITIONS=47} [2023-08-04 09:18:02,415 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-08-04 09:18:02,415 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 47 transitions, 148 flow [2023-08-04 09:18:02,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 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) [2023-08-04 09:18:02,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:18:02,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:18:02,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 09:18:02,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:18:02,620 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:18:02,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:18:02,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1260112371, now seen corresponding path program 1 times [2023-08-04 09:18:02,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:18:02,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259090971] [2023-08-04 09:18:02,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:18:02,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:18:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:18:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:18:02,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:18:02,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259090971] [2023-08-04 09:18:02,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259090971] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:18:02,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112471118] [2023-08-04 09:18:02,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:18:02,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:18:02,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:18:02,709 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) [2023-08-04 09:18:02,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 09:18:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:18:02,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:18:02,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:18:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:18:02,815 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:18:02,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112471118] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:18:02,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:18:02,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:18:02,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632884835] [2023-08-04 09:18:02,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:18:02,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:18:02,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:18:02,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:18:02,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:18:02,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 359 [2023-08-04 09:18:02,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 47 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 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) [2023-08-04 09:18:02,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:18:02,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 359 [2023-08-04 09:18:02,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:18:03,001 INFO L124 PetriNetUnfolderBase]: 1108/1595 cut-off events. [2023-08-04 09:18:03,001 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2023-08-04 09:18:03,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3461 conditions, 1595 events. 1108/1595 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6220 event pairs, 527 based on Foata normal form. 0/1031 useless extension candidates. Maximal degree in co-relation 2560. Up to 1487 conditions per place. [2023-08-04 09:18:03,009 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 43 selfloop transitions, 2 changer transitions 3/54 dead transitions. [2023-08-04 09:18:03,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 54 transitions, 258 flow [2023-08-04 09:18:03,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:18:03,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:18:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-08-04 09:18:03,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48375116063138346 [2023-08-04 09:18:03,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-08-04 09:18:03,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-08-04 09:18:03,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:18:03,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-08-04 09:18:03,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 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) [2023-08-04 09:18:03,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 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) [2023-08-04 09:18:03,015 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 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) [2023-08-04 09:18:03,015 INFO L175 Difference]: Start difference. First operand has 44 places, 47 transitions, 148 flow. Second operand 3 states and 521 transitions. [2023-08-04 09:18:03,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 54 transitions, 258 flow [2023-08-04 09:18:03,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:18:03,019 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 146 flow [2023-08-04 09:18:03,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2023-08-04 09:18:03,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-08-04 09:18:03,020 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 146 flow [2023-08-04 09:18:03,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 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) [2023-08-04 09:18:03,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:18:03,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:18:03,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 09:18:03,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:18:03,226 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:18:03,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:18:03,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1955966213, now seen corresponding path program 1 times [2023-08-04 09:18:03,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:18:03,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143478674] [2023-08-04 09:18:03,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:18:03,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:18:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:18:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:18:03,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:18:03,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143478674] [2023-08-04 09:18:03,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143478674] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:18:03,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408652567] [2023-08-04 09:18:03,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:18:03,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:18:03,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:18:03,281 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) [2023-08-04 09:18:03,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 09:18:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:18:03,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:18:03,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:18:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:18:03,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:18:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:18:03,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408652567] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:18:03,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:18:03,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:18:03,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360774091] [2023-08-04 09:18:03,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:18:03,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:18:03,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:18:03,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:18:03,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:18:03,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 359 [2023-08-04 09:18:03,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 163.8) internal successors, (819), 5 states have internal predecessors, (819), 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) [2023-08-04 09:18:03,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:18:03,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 359 [2023-08-04 09:18:03,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:18:03,443 INFO L124 PetriNetUnfolderBase]: 9/21 cut-off events. [2023-08-04 09:18:03,443 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 09:18:03,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 21 events. 9/21 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 25 event pairs, 2 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 44. Up to 13 conditions per place. [2023-08-04 09:18:03,443 INFO L140 encePairwiseOnDemand]: 356/359 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2023-08-04 09:18:03,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 12 transitions, 50 flow [2023-08-04 09:18:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:18:03,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:18:03,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 640 transitions. [2023-08-04 09:18:03,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4456824512534819 [2023-08-04 09:18:03,446 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 640 transitions. [2023-08-04 09:18:03,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 640 transitions. [2023-08-04 09:18:03,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:18:03,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 640 transitions. [2023-08-04 09:18:03,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 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) [2023-08-04 09:18:03,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 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) [2023-08-04 09:18:03,450 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 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) [2023-08-04 09:18:03,450 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 146 flow. Second operand 4 states and 640 transitions. [2023-08-04 09:18:03,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 12 transitions, 50 flow [2023-08-04 09:18:03,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 12 transitions, 48 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:18:03,451 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-04 09:18:03,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=20, PETRI_TRANSITIONS=0} [2023-08-04 09:18:03,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -23 predicate places. [2023-08-04 09:18:03,452 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-04 09:18:03,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 163.8) internal successors, (819), 5 states have internal predecessors, (819), 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) [2023-08-04 09:18:03,455 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:18:03,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 09:18:03,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:18:03,661 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:18:03,662 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:18:03,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 192 transitions, 426 flow [2023-08-04 09:18:03,692 INFO L124 PetriNetUnfolderBase]: 101/660 cut-off events. [2023-08-04 09:18:03,693 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:18:03,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 660 events. 101/660 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3225 event pairs, 0 based on Foata normal form. 0/549 useless extension candidates. Maximal degree in co-relation 373. Up to 16 conditions per place. [2023-08-04 09:18:03,694 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 192 transitions, 426 flow [2023-08-04 09:18:03,696 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 192 transitions, 426 flow [2023-08-04 09:18:03,696 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:18:03,696 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 192 transitions, 426 flow [2023-08-04 09:18:03,696 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 192 transitions, 426 flow [2023-08-04 09:18:03,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 192 transitions, 426 flow [2023-08-04 09:18:03,724 INFO L124 PetriNetUnfolderBase]: 101/660 cut-off events. [2023-08-04 09:18:03,724 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:18:03,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 660 events. 101/660 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3225 event pairs, 0 based on Foata normal form. 0/549 useless extension candidates. Maximal degree in co-relation 373. Up to 16 conditions per place. [2023-08-04 09:18:03,730 INFO L119 LiptonReduction]: Number of co-enabled transitions 5220 [2023-08-04 09:18:07,485 INFO L134 LiptonReduction]: Checked pairs total: 8622 [2023-08-04 09:18:07,486 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-04 09:18:07,487 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:18:07,487 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=true, 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;@3881024b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:18:07,487 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:18:07,489 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:18:07,489 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2023-08-04 09:18:07,489 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:18:07,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:18:07,489 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 09:18:07,490 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:18:07,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:18:07,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1313613597, now seen corresponding path program 1 times [2023-08-04 09:18:07,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:18:07,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350910285] [2023-08-04 09:18:07,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:18:07,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:18:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:18:07,520 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:18:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:18:07,559 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:18:07,560 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:18:07,560 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:18:07,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:18:07,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:18:07,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:18:07,560 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:18:07,560 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:18:07,561 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:18:07,561 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:18:07,586 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:18:07,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 234 transitions, 558 flow [2023-08-04 09:18:07,891 INFO L124 PetriNetUnfolderBase]: 891/4149 cut-off events. [2023-08-04 09:18:07,892 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:18:07,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4823 conditions, 4149 events. 891/4149 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33177 event pairs, 22 based on Foata normal form. 0/3502 useless extension candidates. Maximal degree in co-relation 2466. Up to 192 conditions per place. [2023-08-04 09:18:07,920 INFO L82 GeneralOperation]: Start removeDead. Operand has 205 places, 234 transitions, 558 flow [2023-08-04 09:18:07,937 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 205 places, 234 transitions, 558 flow [2023-08-04 09:18:07,937 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:18:07,938 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 205 places, 234 transitions, 558 flow [2023-08-04 09:18:07,938 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 205 places, 234 transitions, 558 flow [2023-08-04 09:18:07,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 234 transitions, 558 flow [2023-08-04 09:18:08,215 INFO L124 PetriNetUnfolderBase]: 891/4149 cut-off events. [2023-08-04 09:18:08,215 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:18:08,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4823 conditions, 4149 events. 891/4149 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33177 event pairs, 22 based on Foata normal form. 0/3502 useless extension candidates. Maximal degree in co-relation 2466. Up to 192 conditions per place. [2023-08-04 09:18:08,361 INFO L119 LiptonReduction]: Number of co-enabled transitions 13500 [2023-08-04 09:18:13,638 INFO L134 LiptonReduction]: Checked pairs total: 27531 [2023-08-04 09:18:13,638 INFO L136 LiptonReduction]: Total number of compositions: 188 [2023-08-04 09:18:13,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:18:13,640 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=true, 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;@3881024b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:18:13,640 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:18:13,642 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:18:13,642 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2023-08-04 09:18:13,642 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:18:13,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:18:13,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:18:13,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:18:13,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:18:13,642 INFO L85 PathProgramCache]: Analyzing trace with hash -970916567, now seen corresponding path program 1 times [2023-08-04 09:18:13,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:18:13,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202637286] [2023-08-04 09:18:13,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:18:13,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:18:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:18:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:18:13,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:18:13,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202637286] [2023-08-04 09:18:13,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202637286] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:18:13,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:18:13,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:18:13,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281807671] [2023-08-04 09:18:13,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:18:13,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:18:13,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:18:13,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:18:13,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:18:13,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 422 [2023-08-04 09:18:13,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 73 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 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) [2023-08-04 09:18:13,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:18:13,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 422 [2023-08-04 09:18:13,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:18:34,641 INFO L124 PetriNetUnfolderBase]: 282623/337117 cut-off events. [2023-08-04 09:18:34,641 INFO L125 PetriNetUnfolderBase]: For 35740/35740 co-relation queries the response was YES. [2023-08-04 09:18:35,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685471 conditions, 337117 events. 282623/337117 cut-off events. For 35740/35740 co-relation queries the response was YES. Maximal size of possible extension queue 6401. Compared 1586595 event pairs, 121251 based on Foata normal form. 0/188827 useless extension candidates. Maximal degree in co-relation 224713. Up to 327469 conditions per place. [2023-08-04 09:18:36,654 INFO L140 encePairwiseOnDemand]: 418/422 looper letters, 59 selfloop transitions, 2 changer transitions 3/76 dead transitions. [2023-08-04 09:18:36,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 364 flow [2023-08-04 09:18:36,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:18:36,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:18:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 609 transitions. [2023-08-04 09:18:36,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48104265402843605 [2023-08-04 09:18:36,656 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 609 transitions. [2023-08-04 09:18:36,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 609 transitions. [2023-08-04 09:18:36,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:18:36,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 609 transitions. [2023-08-04 09:18:36,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 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) [2023-08-04 09:18:36,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2023-08-04 09:18:36,660 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2023-08-04 09:18:36,660 INFO L175 Difference]: Start difference. First operand has 61 places, 73 transitions, 236 flow. Second operand 3 states and 609 transitions. [2023-08-04 09:18:36,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 364 flow [2023-08-04 09:18:36,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 76 transitions, 364 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:18:36,682 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 228 flow [2023-08-04 09:18:36,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=63, PETRI_TRANSITIONS=70} [2023-08-04 09:18:36,682 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 09:18:36,682 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 228 flow [2023-08-04 09:18:36,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 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) [2023-08-04 09:18:36,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:18:36,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:18:36,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:18:36,683 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:18:36,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:18:36,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1700781989, now seen corresponding path program 1 times [2023-08-04 09:18:36,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:18:36,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020735657] [2023-08-04 09:18:36,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:18:36,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:18:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:18:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:18:36,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:18:36,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020735657] [2023-08-04 09:18:36,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020735657] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:18:36,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330459320] [2023-08-04 09:18:36,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:18:36,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:18:36,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:18:36,709 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) [2023-08-04 09:18:36,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 09:18:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:18:36,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:18:36,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:18:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:18:36,785 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:18:36,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330459320] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:18:36,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:18:36,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:18:36,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791063283] [2023-08-04 09:18:36,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:18:36,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:18:36,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:18:36,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:18:36,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:18:36,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 422 [2023-08-04 09:18:36,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 70 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 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) [2023-08-04 09:18:36,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:18:36,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 422 [2023-08-04 09:18:36,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:18:57,267 INFO L124 PetriNetUnfolderBase]: 278801/332182 cut-off events. [2023-08-04 09:18:57,267 INFO L125 PetriNetUnfolderBase]: For 34572/34572 co-relation queries the response was YES. [2023-08-04 09:18:58,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675359 conditions, 332182 events. 278801/332182 cut-off events. For 34572/34572 co-relation queries the response was YES. Maximal size of possible extension queue 6460. Compared 1567097 event pairs, 119881 based on Foata normal form. 0/185954 useless extension candidates. Maximal degree in co-relation 675323. Up to 322814 conditions per place. [2023-08-04 09:18:59,297 INFO L140 encePairwiseOnDemand]: 419/422 looper letters, 64 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-04 09:18:59,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 376 flow [2023-08-04 09:18:59,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:18:59,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:18:59,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-08-04 09:18:59,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834123222748815 [2023-08-04 09:18:59,299 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-08-04 09:18:59,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-08-04 09:18:59,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:18:59,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-08-04 09:18:59,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 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) [2023-08-04 09:18:59,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2023-08-04 09:18:59,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2023-08-04 09:18:59,302 INFO L175 Difference]: Start difference. First operand has 63 places, 70 transitions, 228 flow. Second operand 3 states and 612 transitions. [2023-08-04 09:18:59,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 376 flow [2023-08-04 09:18:59,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 362 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:18:59,385 INFO L231 Difference]: Finished difference. Result has 59 places, 71 transitions, 226 flow [2023-08-04 09:18:59,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=59, PETRI_TRANSITIONS=71} [2023-08-04 09:18:59,386 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -2 predicate places. [2023-08-04 09:18:59,386 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 71 transitions, 226 flow [2023-08-04 09:18:59,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 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) [2023-08-04 09:18:59,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:18:59,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:18:59,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 09:18:59,592 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 [2023-08-04 09:18:59,592 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:18:59,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:18:59,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1294606186, now seen corresponding path program 1 times [2023-08-04 09:18:59,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:18:59,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678612532] [2023-08-04 09:18:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:18:59,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:18:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:18:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:18:59,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:18:59,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678612532] [2023-08-04 09:18:59,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678612532] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:18:59,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633746030] [2023-08-04 09:18:59,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:18:59,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:18:59,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:18:59,627 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) [2023-08-04 09:18:59,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 09:18:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:18:59,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:18:59,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:18:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:18:59,703 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:18:59,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633746030] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:18:59,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:18:59,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:18:59,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081170195] [2023-08-04 09:18:59,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:18:59,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:18:59,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:18:59,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:18:59,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:18:59,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 422 [2023-08-04 09:18:59,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 71 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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) [2023-08-04 09:18:59,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:18:59,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 422 [2023-08-04 09:18:59,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:19:19,607 INFO L124 PetriNetUnfolderBase]: 278203/333666 cut-off events. [2023-08-04 09:19:19,607 INFO L125 PetriNetUnfolderBase]: For 16789/16789 co-relation queries the response was YES. [2023-08-04 09:19:20,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675995 conditions, 333666 events. 278203/333666 cut-off events. For 16789/16789 co-relation queries the response was YES. Maximal size of possible extension queue 7023. Compared 1660125 event pairs, 118847 based on Foata normal form. 0/187953 useless extension candidates. Maximal degree in co-relation 233318. Up to 318914 conditions per place. [2023-08-04 09:19:21,466 INFO L140 encePairwiseOnDemand]: 419/422 looper letters, 69 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-04 09:19:21,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 83 transitions, 392 flow [2023-08-04 09:19:21,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:19:21,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:19:21,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 616 transitions. [2023-08-04 09:19:21,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48657187993680884 [2023-08-04 09:19:21,468 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 616 transitions. [2023-08-04 09:19:21,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 616 transitions. [2023-08-04 09:19:21,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:19:21,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 616 transitions. [2023-08-04 09:19:21,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 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) [2023-08-04 09:19:21,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2023-08-04 09:19:21,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2023-08-04 09:19:21,472 INFO L175 Difference]: Start difference. First operand has 59 places, 71 transitions, 226 flow. Second operand 3 states and 616 transitions. [2023-08-04 09:19:21,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 83 transitions, 392 flow [2023-08-04 09:19:21,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:19:21,481 INFO L231 Difference]: Finished difference. Result has 61 places, 72 transitions, 236 flow [2023-08-04 09:19:21,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=61, PETRI_TRANSITIONS=72} [2023-08-04 09:19:21,481 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2023-08-04 09:19:21,481 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 72 transitions, 236 flow [2023-08-04 09:19:21,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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) [2023-08-04 09:19:21,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:19:21,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:19:21,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 09:19:21,687 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 [2023-08-04 09:19:21,687 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:19:21,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:19:21,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1943857183, now seen corresponding path program 1 times [2023-08-04 09:19:21,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:19:21,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406388311] [2023-08-04 09:19:21,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:21,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:19:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:19:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:19:21,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:19:21,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406388311] [2023-08-04 09:19:21,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406388311] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:19:21,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349622503] [2023-08-04 09:19:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:21,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:19:21,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:19:21,716 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) [2023-08-04 09:19:21,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 09:19:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:19:21,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:19:21,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:19:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:19:21,802 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:19:21,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349622503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:19:21,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:19:21,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:19:21,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323353001] [2023-08-04 09:19:21,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:19:21,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:19:21,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:19:21,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:19:21,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:19:21,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 422 [2023-08-04 09:19:21,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 72 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 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) [2023-08-04 09:19:21,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:19:21,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 422 [2023-08-04 09:19:21,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:19:40,360 INFO L124 PetriNetUnfolderBase]: 246598/297048 cut-off events. [2023-08-04 09:19:40,360 INFO L125 PetriNetUnfolderBase]: For 13326/13326 co-relation queries the response was YES. [2023-08-04 09:19:41,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606627 conditions, 297048 events. 246598/297048 cut-off events. For 13326/13326 co-relation queries the response was YES. Maximal size of possible extension queue 6217. Compared 1490144 event pairs, 95714 based on Foata normal form. 0/169878 useless extension candidates. Maximal degree in co-relation 225285. Up to 240767 conditions per place. [2023-08-04 09:19:42,336 INFO L140 encePairwiseOnDemand]: 419/422 looper letters, 78 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-08-04 09:19:42,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 92 transitions, 451 flow [2023-08-04 09:19:42,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:19:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:19:42,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 624 transitions. [2023-08-04 09:19:42,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928909952606635 [2023-08-04 09:19:42,342 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 624 transitions. [2023-08-04 09:19:42,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 624 transitions. [2023-08-04 09:19:42,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:19:42,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 624 transitions. [2023-08-04 09:19:42,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 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) [2023-08-04 09:19:42,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2023-08-04 09:19:42,345 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2023-08-04 09:19:42,345 INFO L175 Difference]: Start difference. First operand has 61 places, 72 transitions, 236 flow. Second operand 3 states and 624 transitions. [2023-08-04 09:19:42,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 92 transitions, 451 flow [2023-08-04 09:19:42,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 92 transitions, 449 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:19:42,354 INFO L231 Difference]: Finished difference. Result has 63 places, 73 transitions, 246 flow [2023-08-04 09:19:42,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=63, PETRI_TRANSITIONS=73} [2023-08-04 09:19:42,354 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 09:19:42,354 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 73 transitions, 246 flow [2023-08-04 09:19:42,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 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) [2023-08-04 09:19:42,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:19:42,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:19:42,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 09:19:42,558 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 [2023-08-04 09:19:42,558 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:19:42,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:19:42,559 INFO L85 PathProgramCache]: Analyzing trace with hash -2033929084, now seen corresponding path program 1 times [2023-08-04 09:19:42,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:19:42,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498456267] [2023-08-04 09:19:42,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:42,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:19:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:19:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:19:42,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:19:42,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498456267] [2023-08-04 09:19:42,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498456267] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:19:42,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67829111] [2023-08-04 09:19:42,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:42,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:19:42,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:19:42,600 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) [2023-08-04 09:19:42,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 09:19:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:19:42,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:19:42,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:19:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:19:42,687 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:19:42,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67829111] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:19:42,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:19:42,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:19:42,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268827652] [2023-08-04 09:19:42,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:19:42,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:19:42,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:19:42,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:19:42,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:19:42,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 422 [2023-08-04 09:19:42,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 73 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 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) [2023-08-04 09:19:42,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:19:42,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 422 [2023-08-04 09:19:42,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:19:59,659 INFO L124 PetriNetUnfolderBase]: 229467/278319 cut-off events. [2023-08-04 09:19:59,659 INFO L125 PetriNetUnfolderBase]: For 26311/26311 co-relation queries the response was YES. [2023-08-04 09:20:00,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581615 conditions, 278319 events. 229467/278319 cut-off events. For 26311/26311 co-relation queries the response was YES. Maximal size of possible extension queue 5091. Compared 1407433 event pairs, 86967 based on Foata normal form. 0/164956 useless extension candidates. Maximal degree in co-relation 229378. Up to 211355 conditions per place. [2023-08-04 09:20:01,417 INFO L140 encePairwiseOnDemand]: 419/422 looper letters, 79 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-08-04 09:20:01,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 93 transitions, 463 flow [2023-08-04 09:20:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:20:01,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:20:01,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 624 transitions. [2023-08-04 09:20:01,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928909952606635 [2023-08-04 09:20:01,419 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 624 transitions. [2023-08-04 09:20:01,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 624 transitions. [2023-08-04 09:20:01,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:20:01,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 624 transitions. [2023-08-04 09:20:01,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 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) [2023-08-04 09:20:01,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2023-08-04 09:20:01,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2023-08-04 09:20:01,422 INFO L175 Difference]: Start difference. First operand has 63 places, 73 transitions, 246 flow. Second operand 3 states and 624 transitions. [2023-08-04 09:20:01,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 93 transitions, 463 flow [2023-08-04 09:20:01,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 461 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:20:01,722 INFO L231 Difference]: Finished difference. Result has 65 places, 74 transitions, 256 flow [2023-08-04 09:20:01,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=65, PETRI_TRANSITIONS=74} [2023-08-04 09:20:01,722 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 4 predicate places. [2023-08-04 09:20:01,722 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 74 transitions, 256 flow [2023-08-04 09:20:01,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 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) [2023-08-04 09:20:01,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:20:01,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:20:01,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 09:20:01,927 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 [2023-08-04 09:20:01,928 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:20:01,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:20:01,928 INFO L85 PathProgramCache]: Analyzing trace with hash 553491723, now seen corresponding path program 1 times [2023-08-04 09:20:01,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:20:01,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938730357] [2023-08-04 09:20:01,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:20:01,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:20:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:20:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:20:01,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:20:01,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938730357] [2023-08-04 09:20:01,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938730357] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:20:01,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794979463] [2023-08-04 09:20:01,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:20:01,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:20:01,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:20:01,971 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) [2023-08-04 09:20:01,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 09:20:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:20:02,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:20:02,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:20:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:20:02,068 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:20:02,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794979463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:20:02,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:20:02,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:20:02,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111547483] [2023-08-04 09:20:02,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:20:02,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:20:02,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:20:02,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:20:02,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:20:02,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 422 [2023-08-04 09:20:02,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 74 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 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) [2023-08-04 09:20:02,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:20:02,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 422 [2023-08-04 09:20:02,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:20:19,504 INFO L124 PetriNetUnfolderBase]: 228401/277734 cut-off events. [2023-08-04 09:20:19,504 INFO L125 PetriNetUnfolderBase]: For 28423/28423 co-relation queries the response was YES. [2023-08-04 09:20:20,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587989 conditions, 277734 events. 228401/277734 cut-off events. For 28423/28423 co-relation queries the response was YES. Maximal size of possible extension queue 4984. Compared 1408759 event pairs, 100117 based on Foata normal form. 0/167999 useless extension candidates. Maximal degree in co-relation 315843. Up to 241882 conditions per place. [2023-08-04 09:20:21,409 INFO L140 encePairwiseOnDemand]: 419/422 looper letters, 80 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-04 09:20:21,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 94 transitions, 475 flow [2023-08-04 09:20:21,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:20:21,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:20:21,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 624 transitions. [2023-08-04 09:20:21,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928909952606635 [2023-08-04 09:20:21,411 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 624 transitions. [2023-08-04 09:20:21,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 624 transitions. [2023-08-04 09:20:21,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:20:21,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 624 transitions. [2023-08-04 09:20:21,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 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) [2023-08-04 09:20:21,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2023-08-04 09:20:21,414 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2023-08-04 09:20:21,414 INFO L175 Difference]: Start difference. First operand has 65 places, 74 transitions, 256 flow. Second operand 3 states and 624 transitions. [2023-08-04 09:20:21,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 94 transitions, 475 flow [2023-08-04 09:20:23,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 94 transitions, 473 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:20:23,938 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 266 flow [2023-08-04 09:20:23,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2023-08-04 09:20:23,939 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 6 predicate places. [2023-08-04 09:20:23,939 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 266 flow [2023-08-04 09:20:23,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 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) [2023-08-04 09:20:23,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:20:23,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:20:23,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 09:20:24,144 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 [2023-08-04 09:20:24,145 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:20:24,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:20:24,145 INFO L85 PathProgramCache]: Analyzing trace with hash -177915612, now seen corresponding path program 1 times [2023-08-04 09:20:24,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:20:24,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65990642] [2023-08-04 09:20:24,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:20:24,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:20:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:20:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:20:24,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:20:24,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65990642] [2023-08-04 09:20:24,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65990642] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:20:24,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697529435] [2023-08-04 09:20:24,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:20:24,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:20:24,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:20:24,180 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) [2023-08-04 09:20:24,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 09:20:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:20:24,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:20:24,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:20:24,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:20:24,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:20:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:20:24,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697529435] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:20:24,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:20:24,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:20:24,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48680855] [2023-08-04 09:20:24,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:20:24,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:20:24,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:20:24,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:20:24,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:20:24,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 422 [2023-08-04 09:20:24,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 266 flow. Second operand has 5 states, 5 states have (on average 187.6) internal successors, (938), 5 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:20:24,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:20:24,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 422 [2023-08-04 09:20:24,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:20:41,094 INFO L124 PetriNetUnfolderBase]: 213305/259296 cut-off events. [2023-08-04 09:20:41,094 INFO L125 PetriNetUnfolderBase]: For 24758/24758 co-relation queries the response was YES. [2023-08-04 09:20:41,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 551376 conditions, 259296 events. 213305/259296 cut-off events. For 24758/24758 co-relation queries the response was YES. Maximal size of possible extension queue 4965. Compared 1316575 event pairs, 77387 based on Foata normal form. 3/157638 useless extension candidates. Maximal degree in co-relation 466459. Up to 250738 conditions per place. [2023-08-04 09:20:42,763 INFO L140 encePairwiseOnDemand]: 418/422 looper letters, 67 selfloop transitions, 3 changer transitions 1/83 dead transitions. [2023-08-04 09:20:42,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 424 flow [2023-08-04 09:20:42,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:20:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:20:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 791 transitions. [2023-08-04 09:20:42,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46860189573459715 [2023-08-04 09:20:42,766 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 791 transitions. [2023-08-04 09:20:42,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 791 transitions. [2023-08-04 09:20:42,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:20:42,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 791 transitions. [2023-08-04 09:20:42,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 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) [2023-08-04 09:20:42,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 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) [2023-08-04 09:20:42,771 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 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) [2023-08-04 09:20:42,771 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 266 flow. Second operand 4 states and 791 transitions. [2023-08-04 09:20:42,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 424 flow [2023-08-04 09:20:46,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 83 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:20:46,623 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 278 flow [2023-08-04 09:20:46,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=278, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2023-08-04 09:20:46,623 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 10 predicate places. [2023-08-04 09:20:46,623 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 278 flow [2023-08-04 09:20:46,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 187.6) internal successors, (938), 5 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:20:46,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:20:46,624 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:20:46,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 09:20:46,824 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 [2023-08-04 09:20:46,825 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:20:46,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:20:46,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1570373335, now seen corresponding path program 1 times [2023-08-04 09:20:46,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:20:46,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299215334] [2023-08-04 09:20:46,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:20:46,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:20:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:20:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 09:20:46,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:20:46,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299215334] [2023-08-04 09:20:46,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299215334] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:20:46,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767576233] [2023-08-04 09:20:46,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:20:46,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:20:46,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:20:46,869 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) [2023-08-04 09:20:46,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 09:20:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:20:46,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:20:46,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:20:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 09:20:46,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:20:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 09:20:47,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767576233] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:20:47,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:20:47,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:20:47,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296197098] [2023-08-04 09:20:47,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:20:47,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:20:47,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:20:47,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:20:47,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:20:47,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 422 [2023-08-04 09:20:47,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 187.8) internal successors, (939), 5 states have internal predecessors, (939), 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) [2023-08-04 09:20:47,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:20:47,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 422 [2023-08-04 09:20:47,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand