/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-min-le-max.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:27:05,870 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:27:05,916 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:27:05,920 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:27:05,920 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:27:05,920 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:27:05,921 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:27:05,937 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:27:05,938 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:27:05,938 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:27:05,939 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:27:05,939 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:27:05,939 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:27:05,940 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:27:05,940 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:27:05,941 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:27:05,941 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:27:05,941 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:27:05,942 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:27:05,942 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:27:05,942 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:27:05,943 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:27:05,943 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:27:05,943 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:27:05,944 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:27:05,944 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:27:05,944 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:27:05,945 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:27:05,945 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:27:05,945 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:27:05,945 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:27:05,946 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:27:05,946 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:27:05,946 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:27:05,947 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:27:05,947 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:27:05,947 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:27:05,948 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:27:05,948 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:27:05,948 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:27:05,948 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:27:05,951 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:27:06,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:27:06,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:27:06,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:27:06,162 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:27:06,163 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:27:06,164 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-min-le-max.wvr_bound2.c [2023-08-04 09:27:07,216 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:27:07,409 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:27:07,409 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-min-le-max.wvr_bound2.c [2023-08-04 09:27:07,417 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5510bf0b1/1012e10f25864000b54100e22e2e9bc1/FLAG573a58864 [2023-08-04 09:27:07,431 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5510bf0b1/1012e10f25864000b54100e22e2e9bc1 [2023-08-04 09:27:07,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:27:07,438 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:27:07,442 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:27:07,442 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:27:07,445 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:27:07,446 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:27:07" (1/1) ... [2023-08-04 09:27:07,447 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2056ffc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:27:07, skipping insertion in model container [2023-08-04 09:27:07,447 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:27:07" (1/1) ... [2023-08-04 09:27:07,473 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:27:07,631 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-min-le-max.wvr_bound2.c[2729,2742] [2023-08-04 09:27:07,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:27:07,642 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:27:07,667 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-min-le-max.wvr_bound2.c[2729,2742] [2023-08-04 09:27:07,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:27:07,676 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:27:07,676 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:27:07,682 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:27:07,682 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:27:07 WrapperNode [2023-08-04 09:27:07,682 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:27:07,683 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:27:07,683 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:27:07,683 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:27:07,689 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:27:07" (1/1) ... [2023-08-04 09:27:07,696 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:27:07" (1/1) ... [2023-08-04 09:27:07,717 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 154 [2023-08-04 09:27:07,717 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:27:07,718 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:27:07,718 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:27:07,718 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:27:07,725 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:27:07" (1/1) ... [2023-08-04 09:27:07,725 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:27:07" (1/1) ... [2023-08-04 09:27:07,728 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:27:07" (1/1) ... [2023-08-04 09:27:07,728 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:27:07" (1/1) ... [2023-08-04 09:27:07,736 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:27:07" (1/1) ... [2023-08-04 09:27:07,739 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:27:07" (1/1) ... [2023-08-04 09:27:07,741 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:27:07" (1/1) ... [2023-08-04 09:27:07,742 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:27:07" (1/1) ... [2023-08-04 09:27:07,744 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:27:07,745 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:27:07,745 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:27:07,745 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:27:07,746 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:27:07" (1/1) ... [2023-08-04 09:27:07,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:27:07,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:27:07,774 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 09:27:07,785 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 09:27:07,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:27:07,813 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:27:07,813 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:27:07,813 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:27:07,813 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:27:07,813 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:27:07,813 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:27:07,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:27:07,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:27:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:27:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:27:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:27:07,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:27:07,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:27:07,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:27:07,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:27:07,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:27:07,817 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 09:27:07,932 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:27:07,934 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:27:08,211 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:27:08,259 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:27:08,260 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-04 09:27:08,262 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:27:08 BoogieIcfgContainer [2023-08-04 09:27:08,262 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:27:08,264 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:27:08,264 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:27:08,266 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:27:08,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:27:07" (1/3) ... [2023-08-04 09:27:08,267 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6793bd98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:27:08, skipping insertion in model container [2023-08-04 09:27:08,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:27:07" (2/3) ... [2023-08-04 09:27:08,268 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6793bd98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:27:08, skipping insertion in model container [2023-08-04 09:27:08,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:27:08" (3/3) ... [2023-08-04 09:27:08,268 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-min-le-max.wvr_bound2.c [2023-08-04 09:27:08,273 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:27:08,279 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:27:08,279 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:27:08,279 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:27:08,380 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:27:08,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 188 transitions, 418 flow [2023-08-04 09:27:08,579 INFO L124 PetriNetUnfolderBase]: 93/635 cut-off events. [2023-08-04 09:27:08,579 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:27:08,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 635 events. 93/635 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3047 event pairs, 0 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 353. Up to 16 conditions per place. [2023-08-04 09:27:08,589 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 188 transitions, 418 flow [2023-08-04 09:27:08,598 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 188 transitions, 418 flow [2023-08-04 09:27:08,601 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:27:08,613 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 188 transitions, 418 flow [2023-08-04 09:27:08,619 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 188 transitions, 418 flow [2023-08-04 09:27:08,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 188 transitions, 418 flow [2023-08-04 09:27:08,702 INFO L124 PetriNetUnfolderBase]: 93/635 cut-off events. [2023-08-04 09:27:08,702 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:27:08,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 635 events. 93/635 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3047 event pairs, 0 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 353. Up to 16 conditions per place. [2023-08-04 09:27:08,712 INFO L119 LiptonReduction]: Number of co-enabled transitions 4058 [2023-08-04 09:27:13,528 INFO L134 LiptonReduction]: Checked pairs total: 6670 [2023-08-04 09:27:13,528 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-08-04 09:27:13,541 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:27:13,546 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;@5d862f39, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:27:13,546 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:27:13,550 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:27:13,551 INFO L124 PetriNetUnfolderBase]: 3/34 cut-off events. [2023-08-04 09:27:13,551 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:27:13,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:27:13,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:27:13,552 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:27:13,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:27:13,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1751036201, now seen corresponding path program 1 times [2023-08-04 09:27:13,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:27:13,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153593583] [2023-08-04 09:27:13,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:13,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:27:13,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:13,784 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 09:27:13,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:27:13,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153593583] [2023-08-04 09:27:13,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153593583] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:27:13,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:27:13,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:27:13,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854314832] [2023-08-04 09:27:13,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:27:13,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:27:13,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:27:13,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:27:13,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:27:13,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 352 [2023-08-04 09:27:13,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 47 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 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 09:27:13,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:27:13,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 352 [2023-08-04 09:27:13,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:27:14,101 INFO L124 PetriNetUnfolderBase]: 1378/2067 cut-off events. [2023-08-04 09:27:14,102 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2023-08-04 09:27:14,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4197 conditions, 2067 events. 1378/2067 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10099 event pairs, 563 based on Foata normal form. 0/1308 useless extension candidates. Maximal degree in co-relation 3433. Up to 1937 conditions per place. [2023-08-04 09:27:14,114 INFO L140 encePairwiseOnDemand]: 348/352 looper letters, 38 selfloop transitions, 2 changer transitions 4/49 dead transitions. [2023-08-04 09:27:14,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 222 flow [2023-08-04 09:27:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:27:14,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:27:14,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-04 09:27:14,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48390151515151514 [2023-08-04 09:27:14,134 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-04 09:27:14,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-04 09:27:14,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:27:14,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-04 09:27:14,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 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 09:27:14,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 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 09:27:14,150 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 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 09:27:14,152 INFO L175 Difference]: Start difference. First operand has 42 places, 47 transitions, 136 flow. Second operand 3 states and 511 transitions. [2023-08-04 09:27:14,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 222 flow [2023-08-04 09:27:14,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 49 transitions, 222 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:27:14,159 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 130 flow [2023-08-04 09:27:14,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-04 09:27:14,163 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-04 09:27:14,163 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 130 flow [2023-08-04 09:27:14,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 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 09:27:14,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:27:14,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:27:14,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:27:14,165 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:27:14,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:27:14,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1927210019, now seen corresponding path program 1 times [2023-08-04 09:27:14,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:27:14,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309989209] [2023-08-04 09:27:14,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:14,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:27:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:14,280 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 09:27:14,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:27:14,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309989209] [2023-08-04 09:27:14,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309989209] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:27:14,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658033161] [2023-08-04 09:27:14,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:14,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:27:14,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:27:14,284 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 09:27:14,291 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 09:27:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:14,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:27:14,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:27:14,375 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 09:27:14,375 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:27:14,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658033161] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:27:14,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:27:14,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:27:14,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765583548] [2023-08-04 09:27:14,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:27:14,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:27:14,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:27:14,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:27:14,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:27:14,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 352 [2023-08-04 09:27:14,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 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 09:27:14,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:27:14,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 352 [2023-08-04 09:27:14,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:27:14,576 INFO L124 PetriNetUnfolderBase]: 1331/1964 cut-off events. [2023-08-04 09:27:14,576 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2023-08-04 09:27:14,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3995 conditions, 1964 events. 1331/1964 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9242 event pairs, 550 based on Foata normal form. 0/1240 useless extension candidates. Maximal degree in co-relation 3232. Up to 1840 conditions per place. [2023-08-04 09:27:14,587 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 40 selfloop transitions, 2 changer transitions 1/48 dead transitions. [2023-08-04 09:27:14,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 48 transitions, 226 flow [2023-08-04 09:27:14,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:27:14,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:27:14,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2023-08-04 09:27:14,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2023-08-04 09:27:14,591 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2023-08-04 09:27:14,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2023-08-04 09:27:14,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:27:14,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2023-08-04 09:27:14,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 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 09:27:14,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 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 09:27:14,595 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 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 09:27:14,595 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 130 flow. Second operand 3 states and 512 transitions. [2023-08-04 09:27:14,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 48 transitions, 226 flow [2023-08-04 09:27:14,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 48 transitions, 210 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:27:14,598 INFO L231 Difference]: Finished difference. Result has 39 places, 43 transitions, 122 flow [2023-08-04 09:27:14,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=39, PETRI_TRANSITIONS=43} [2023-08-04 09:27:14,599 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-08-04 09:27:14,599 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 43 transitions, 122 flow [2023-08-04 09:27:14,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 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 09:27:14,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:27:14,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:27:14,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 09:27:14,806 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 09:27:14,806 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:27:14,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:27:14,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1728161238, now seen corresponding path program 1 times [2023-08-04 09:27:14,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:27:14,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546773746] [2023-08-04 09:27:14,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:14,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:27:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:14,931 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 09:27:14,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:27:14,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546773746] [2023-08-04 09:27:14,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546773746] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:27:14,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332378511] [2023-08-04 09:27:14,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:14,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:27:14,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:27:14,938 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 09:27:14,964 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 09:27:15,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:15,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:27:15,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:27:15,023 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 09:27:15,023 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:27:15,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332378511] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:27:15,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:27:15,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:27:15,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016796628] [2023-08-04 09:27:15,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:27:15,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:27:15,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:27:15,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:27:15,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:27:15,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 352 [2023-08-04 09:27:15,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 43 transitions, 122 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 09:27:15,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:27:15,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 352 [2023-08-04 09:27:15,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:27:15,264 INFO L124 PetriNetUnfolderBase]: 1322/1955 cut-off events. [2023-08-04 09:27:15,264 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-04 09:27:15,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3986 conditions, 1955 events. 1322/1955 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8643 event pairs, 498 based on Foata normal form. 0/1248 useless extension candidates. Maximal degree in co-relation 2483. Up to 1730 conditions per place. [2023-08-04 09:27:15,272 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 41 selfloop transitions, 2 changer transitions 1/49 dead transitions. [2023-08-04 09:27:15,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 49 transitions, 222 flow [2023-08-04 09:27:15,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:27:15,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:27:15,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-04 09:27:15,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48579545454545453 [2023-08-04 09:27:15,276 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-04 09:27:15,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-04 09:27:15,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:27:15,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-04 09:27:15,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 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 09:27:15,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 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 09:27:15,280 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 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 09:27:15,280 INFO L175 Difference]: Start difference. First operand has 39 places, 43 transitions, 122 flow. Second operand 3 states and 513 transitions. [2023-08-04 09:27:15,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 49 transitions, 222 flow [2023-08-04 09:27:15,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 49 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:27:15,282 INFO L231 Difference]: Finished difference. Result has 40 places, 43 transitions, 126 flow [2023-08-04 09:27:15,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=40, PETRI_TRANSITIONS=43} [2023-08-04 09:27:15,282 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2023-08-04 09:27:15,283 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 43 transitions, 126 flow [2023-08-04 09:27:15,283 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 09:27:15,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:27:15,283 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 09:27:15,289 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 09:27:15,488 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 09:27:15,489 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:27:15,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:27:15,489 INFO L85 PathProgramCache]: Analyzing trace with hash -2052505044, now seen corresponding path program 1 times [2023-08-04 09:27:15,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:27:15,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254447528] [2023-08-04 09:27:15,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:15,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:27:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:15,594 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 09:27:15,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:27:15,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254447528] [2023-08-04 09:27:15,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254447528] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:27:15,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140119053] [2023-08-04 09:27:15,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:15,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:27:15,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:27:15,596 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 09:27:15,598 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 09:27:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:15,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:27:15,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:27:15,675 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 09:27:15,675 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:27:15,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140119053] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:27:15,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:27:15,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:27:15,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403547597] [2023-08-04 09:27:15,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:27:15,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:27:15,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:27:15,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:27:15,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:27:15,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 352 [2023-08-04 09:27:15,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 43 transitions, 126 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 09:27:15,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:27:15,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 352 [2023-08-04 09:27:15,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:27:15,845 INFO L124 PetriNetUnfolderBase]: 903/1362 cut-off events. [2023-08-04 09:27:15,845 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:27:15,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2855 conditions, 1362 events. 903/1362 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5614 event pairs, 379 based on Foata normal form. 0/884 useless extension candidates. Maximal degree in co-relation 1701. Up to 1094 conditions per place. [2023-08-04 09:27:15,853 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 46 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-04 09:27:15,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 53 transitions, 248 flow [2023-08-04 09:27:15,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:27:15,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:27:15,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-04 09:27:15,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2023-08-04 09:27:15,859 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-04 09:27:15,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-04 09:27:15,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:27:15,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-04 09:27:15,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 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 09:27:15,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 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 09:27:15,863 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 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 09:27:15,863 INFO L175 Difference]: Start difference. First operand has 40 places, 43 transitions, 126 flow. Second operand 3 states and 517 transitions. [2023-08-04 09:27:15,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 53 transitions, 248 flow [2023-08-04 09:27:15,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 53 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:27:15,867 INFO L231 Difference]: Finished difference. Result has 41 places, 44 transitions, 134 flow [2023-08-04 09:27:15,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=41, PETRI_TRANSITIONS=44} [2023-08-04 09:27:15,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-04 09:27:15,869 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 44 transitions, 134 flow [2023-08-04 09:27:15,869 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 09:27:15,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:27:15,869 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] [2023-08-04 09:27:15,877 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 09:27:16,075 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 09:27:16,075 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:27:16,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:27:16,076 INFO L85 PathProgramCache]: Analyzing trace with hash -796566916, now seen corresponding path program 1 times [2023-08-04 09:27:16,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:27:16,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578133020] [2023-08-04 09:27:16,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:16,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:27:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:16,138 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 09:27:16,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:27:16,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578133020] [2023-08-04 09:27:16,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578133020] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:27:16,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643443604] [2023-08-04 09:27:16,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:16,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:27:16,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:27:16,150 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 09:27:16,170 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 09:27:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:16,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:27:16,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:27:16,245 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 09:27:16,246 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:27:16,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643443604] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:27:16,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:27:16,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:27:16,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594777024] [2023-08-04 09:27:16,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:27:16,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:27:16,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:27:16,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:27:16,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:27:16,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 352 [2023-08-04 09:27:16,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 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 09:27:16,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:27:16,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 352 [2023-08-04 09:27:16,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:27:16,387 INFO L124 PetriNetUnfolderBase]: 752/1152 cut-off events. [2023-08-04 09:27:16,388 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2023-08-04 09:27:16,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2502 conditions, 1152 events. 752/1152 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4573 event pairs, 340 based on Foata normal form. 0/802 useless extension candidates. Maximal degree in co-relation 1483. Up to 910 conditions per place. [2023-08-04 09:27:16,393 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 47 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-04 09:27:16,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 54 transitions, 258 flow [2023-08-04 09:27:16,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:27:16,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:27:16,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-04 09:27:16,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2023-08-04 09:27:16,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-04 09:27:16,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-04 09:27:16,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:27:16,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-04 09:27:16,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 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 09:27:16,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 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 09:27:16,399 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 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 09:27:16,399 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 134 flow. Second operand 3 states and 517 transitions. [2023-08-04 09:27:16,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 54 transitions, 258 flow [2023-08-04 09:27:16,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 54 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:27:16,401 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 144 flow [2023-08-04 09:27:16,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=43, PETRI_TRANSITIONS=45} [2023-08-04 09:27:16,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-08-04 09:27:16,404 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 144 flow [2023-08-04 09:27:16,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 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 09:27:16,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:27:16,404 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] [2023-08-04 09:27:16,412 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 09:27:16,609 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 09:27:16,609 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:27:16,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:27:16,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1939769347, now seen corresponding path program 1 times [2023-08-04 09:27:16,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:27:16,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457762252] [2023-08-04 09:27:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:16,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:27:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:16,680 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 09:27:16,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:27:16,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457762252] [2023-08-04 09:27:16,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457762252] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:27:16,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258958727] [2023-08-04 09:27:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:16,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:27:16,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:27:16,683 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 09:27:16,685 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 09:27:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:16,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:27:16,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:27:16,785 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 09:27:16,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:27:16,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258958727] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:27:16,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:27:16,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:27:16,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120291701] [2023-08-04 09:27:16,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:27:16,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:27:16,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:27:16,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:27:16,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:27:16,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 352 [2023-08-04 09:27:16,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 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 09:27:16,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:27:16,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 352 [2023-08-04 09:27:16,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:27:16,931 INFO L124 PetriNetUnfolderBase]: 742/1136 cut-off events. [2023-08-04 09:27:16,932 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2023-08-04 09:27:16,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2508 conditions, 1136 events. 742/1136 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4472 event pairs, 393 based on Foata normal form. 0/807 useless extension candidates. Maximal degree in co-relation 1813. Up to 1053 conditions per place. [2023-08-04 09:27:16,938 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 41 selfloop transitions, 2 changer transitions 3/51 dead transitions. [2023-08-04 09:27:16,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 248 flow [2023-08-04 09:27:16,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:27:16,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:27:16,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-04 09:27:16,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48579545454545453 [2023-08-04 09:27:16,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-04 09:27:16,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-04 09:27:16,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:27:16,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-04 09:27:16,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 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 09:27:16,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 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 09:27:16,944 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 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 09:27:16,944 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 144 flow. Second operand 3 states and 513 transitions. [2023-08-04 09:27:16,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 248 flow [2023-08-04 09:27:16,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:27:16,948 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 142 flow [2023-08-04 09:27:16,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=42, 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=142, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-08-04 09:27:16,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-08-04 09:27:16,950 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 142 flow [2023-08-04 09:27:16,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 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 09:27:16,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:27:16,951 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] [2023-08-04 09:27:16,960 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 09:27:17,159 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 09:27:17,160 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:27:17,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:27:17,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1671069799, now seen corresponding path program 1 times [2023-08-04 09:27:17,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:27:17,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345251502] [2023-08-04 09:27:17,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:17,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:27:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:17,208 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 09:27:17,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:27:17,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345251502] [2023-08-04 09:27:17,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345251502] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:27:17,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631858427] [2023-08-04 09:27:17,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:17,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:27:17,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:27:17,210 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 09:27:17,212 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 09:27:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:17,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:27:17,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:27:17,335 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 09:27:17,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:27:17,350 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 09:27:17,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631858427] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:27:17,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:27:17,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:27:17,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549308770] [2023-08-04 09:27:17,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:27:17,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:27:17,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:27:17,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:27:17,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:27:17,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 352 [2023-08-04 09:27:17,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 161.8) internal successors, (809), 5 states have internal predecessors, (809), 0 states have call successors, (0), 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 09:27:17,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:27:17,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 352 [2023-08-04 09:27:17,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:27:17,382 INFO L124 PetriNetUnfolderBase]: 9/21 cut-off events. [2023-08-04 09:27:17,382 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 09:27:17,382 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 09:27:17,382 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2023-08-04 09:27:17,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 12 transitions, 50 flow [2023-08-04 09:27:17,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:27:17,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:27:17,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 632 transitions. [2023-08-04 09:27:17,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2023-08-04 09:27:17,384 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 632 transitions. [2023-08-04 09:27:17,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 632 transitions. [2023-08-04 09:27:17,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:27:17,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 632 transitions. [2023-08-04 09:27:17,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 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 09:27:17,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 352.0) internal successors, (1760), 5 states have internal predecessors, (1760), 0 states have call successors, (0), 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 09:27:17,388 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 352.0) internal successors, (1760), 5 states have internal predecessors, (1760), 0 states have call successors, (0), 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 09:27:17,388 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 142 flow. Second operand 4 states and 632 transitions. [2023-08-04 09:27:17,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 12 transitions, 50 flow [2023-08-04 09:27:17,389 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 09:27:17,389 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-04 09:27:17,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, 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 09:27:17,390 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -22 predicate places. [2023-08-04 09:27:17,390 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-04 09:27:17,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 161.8) internal successors, (809), 5 states have internal predecessors, (809), 0 states have call successors, (0), 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 09:27:17,392 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:27:17,405 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 09:27:17,597 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 09:27:17,598 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:27:17,599 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:27:17,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 188 transitions, 418 flow [2023-08-04 09:27:17,643 INFO L124 PetriNetUnfolderBase]: 93/635 cut-off events. [2023-08-04 09:27:17,643 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:27:17,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 635 events. 93/635 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3047 event pairs, 0 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 353. Up to 16 conditions per place. [2023-08-04 09:27:17,644 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 188 transitions, 418 flow [2023-08-04 09:27:17,646 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 188 transitions, 418 flow [2023-08-04 09:27:17,646 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:27:17,646 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 188 transitions, 418 flow [2023-08-04 09:27:17,646 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 188 transitions, 418 flow [2023-08-04 09:27:17,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 188 transitions, 418 flow [2023-08-04 09:27:17,688 INFO L124 PetriNetUnfolderBase]: 93/635 cut-off events. [2023-08-04 09:27:17,689 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:27:17,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 635 events. 93/635 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3047 event pairs, 0 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 353. Up to 16 conditions per place. [2023-08-04 09:27:17,695 INFO L119 LiptonReduction]: Number of co-enabled transitions 4058 [2023-08-04 09:27:22,082 INFO L134 LiptonReduction]: Checked pairs total: 7144 [2023-08-04 09:27:22,082 INFO L136 LiptonReduction]: Total number of compositions: 165 [2023-08-04 09:27:22,083 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:27:22,084 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;@5d862f39, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:27:22,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:27:22,087 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:27:22,087 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2023-08-04 09:27:22,087 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:27:22,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:27:22,087 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 09:27:22,087 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:27:22,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:27:22,088 INFO L85 PathProgramCache]: Analyzing trace with hash -68973257, now seen corresponding path program 1 times [2023-08-04 09:27:22,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:27:22,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806564754] [2023-08-04 09:27:22,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:22,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:27:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:22,179 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 09:27:22,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:27:22,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806564754] [2023-08-04 09:27:22,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806564754] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:27:22,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:27:22,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:27:22,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937940884] [2023-08-04 09:27:22,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:27:22,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:27:22,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:27:22,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:27:22,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:27:22,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 353 [2023-08-04 09:27:22,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 47 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 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 09:27:22,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:27:22,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 353 [2023-08-04 09:27:22,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:27:22,374 INFO L124 PetriNetUnfolderBase]: 1442/2185 cut-off events. [2023-08-04 09:27:22,374 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:27:22,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4443 conditions, 2185 events. 1442/2185 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10977 event pairs, 737 based on Foata normal form. 0/1385 useless extension candidates. Maximal degree in co-relation 3442. Up to 2049 conditions per place. [2023-08-04 09:27:22,380 INFO L140 encePairwiseOnDemand]: 349/353 looper letters, 18 selfloop transitions, 2 changer transitions 22/47 dead transitions. [2023-08-04 09:27:22,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 214 flow [2023-08-04 09:27:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:27:22,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:27:22,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 506 transitions. [2023-08-04 09:27:22,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47780925401322 [2023-08-04 09:27:22,382 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 506 transitions. [2023-08-04 09:27:22,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 506 transitions. [2023-08-04 09:27:22,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:27:22,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 506 transitions. [2023-08-04 09:27:22,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 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 09:27:22,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 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 09:27:22,387 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 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 09:27:22,387 INFO L175 Difference]: Start difference. First operand has 42 places, 47 transitions, 136 flow. Second operand 3 states and 506 transitions. [2023-08-04 09:27:22,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 214 flow [2023-08-04 09:27:22,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 47 transitions, 214 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:27:22,389 INFO L231 Difference]: Finished difference. Result has 44 places, 25 transitions, 75 flow [2023-08-04 09:27:22,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=134, 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=75, PETRI_PLACES=44, PETRI_TRANSITIONS=25} [2023-08-04 09:27:22,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-04 09:27:22,391 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 25 transitions, 75 flow [2023-08-04 09:27:22,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 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 09:27:22,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:27:22,392 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:27:22,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:27:22,392 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:27:22,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:27:22,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1468731745, now seen corresponding path program 1 times [2023-08-04 09:27:22,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:27:22,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114158358] [2023-08-04 09:27:22,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:22,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:27:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:27:22,421 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:27:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:27:22,453 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:27:22,453 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:27:22,453 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:27:22,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:27:22,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:27:22,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:27:22,454 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 09:27:22,454 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:27:22,455 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:27:22,455 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:27:22,482 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:27:22,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 223 transitions, 536 flow [2023-08-04 09:27:22,857 INFO L124 PetriNetUnfolderBase]: 855/4026 cut-off events. [2023-08-04 09:27:22,857 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:27:22,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4700 conditions, 4026 events. 855/4026 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 31980 event pairs, 33 based on Foata normal form. 0/3415 useless extension candidates. Maximal degree in co-relation 2382. Up to 192 conditions per place. [2023-08-04 09:27:22,879 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 223 transitions, 536 flow [2023-08-04 09:27:22,900 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 223 transitions, 536 flow [2023-08-04 09:27:22,900 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:27:22,900 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 223 transitions, 536 flow [2023-08-04 09:27:22,900 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 223 transitions, 536 flow [2023-08-04 09:27:22,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 223 transitions, 536 flow [2023-08-04 09:27:23,254 INFO L124 PetriNetUnfolderBase]: 855/4026 cut-off events. [2023-08-04 09:27:23,254 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:27:23,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4700 conditions, 4026 events. 855/4026 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 31980 event pairs, 33 based on Foata normal form. 0/3415 useless extension candidates. Maximal degree in co-relation 2382. Up to 192 conditions per place. [2023-08-04 09:27:23,336 INFO L119 LiptonReduction]: Number of co-enabled transitions 10168 [2023-08-04 09:27:27,971 INFO L134 LiptonReduction]: Checked pairs total: 22447 [2023-08-04 09:27:27,971 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-08-04 09:27:27,973 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:27:27,973 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;@5d862f39, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:27:27,973 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:27:27,976 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:27:27,976 INFO L124 PetriNetUnfolderBase]: 3/31 cut-off events. [2023-08-04 09:27:27,976 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:27:27,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:27:27,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:27:27,976 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:27:27,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:27:27,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1225385646, now seen corresponding path program 1 times [2023-08-04 09:27:27,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:27:27,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631532417] [2023-08-04 09:27:27,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:27,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:27:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:28,007 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 09:27:28,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:27:28,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631532417] [2023-08-04 09:27:28,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631532417] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:27:28,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:27:28,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:27:28,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525051217] [2023-08-04 09:27:28,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:27:28,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:27:28,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:27:28,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:27:28,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:27:28,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 404 [2023-08-04 09:27:28,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 69 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 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 09:27:28,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:27:28,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 404 [2023-08-04 09:27:28,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:27:37,926 INFO L124 PetriNetUnfolderBase]: 129355/160799 cut-off events. [2023-08-04 09:27:37,926 INFO L125 PetriNetUnfolderBase]: For 20264/20264 co-relation queries the response was YES. [2023-08-04 09:27:38,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329124 conditions, 160799 events. 129355/160799 cut-off events. For 20264/20264 co-relation queries the response was YES. Maximal size of possible extension queue 3362. Compared 850412 event pairs, 61282 based on Foata normal form. 0/101053 useless extension candidates. Maximal degree in co-relation 105476. Up to 154988 conditions per place. [2023-08-04 09:27:38,901 INFO L140 encePairwiseOnDemand]: 400/404 looper letters, 57 selfloop transitions, 2 changer transitions 3/72 dead transitions. [2023-08-04 09:27:38,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 352 flow [2023-08-04 09:27:38,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:27:38,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:27:38,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 586 transitions. [2023-08-04 09:27:38,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834983498349835 [2023-08-04 09:27:38,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 586 transitions. [2023-08-04 09:27:38,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 586 transitions. [2023-08-04 09:27:38,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:27:38,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 586 transitions. [2023-08-04 09:27:38,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 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 09:27:38,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 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 09:27:38,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 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 09:27:38,908 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 228 flow. Second operand 3 states and 586 transitions. [2023-08-04 09:27:38,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 352 flow [2023-08-04 09:27:38,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:27:38,919 INFO L231 Difference]: Finished difference. Result has 61 places, 66 transitions, 220 flow [2023-08-04 09:27:38,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=61, PETRI_TRANSITIONS=66} [2023-08-04 09:27:38,920 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-04 09:27:38,920 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 66 transitions, 220 flow [2023-08-04 09:27:38,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 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 09:27:38,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:27:38,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:27:38,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 09:27:38,921 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:27:38,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:27:38,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1739087757, now seen corresponding path program 1 times [2023-08-04 09:27:38,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:27:38,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850491910] [2023-08-04 09:27:38,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:38,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:27:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:38,956 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 09:27:38,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:27:38,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850491910] [2023-08-04 09:27:38,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850491910] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:27:38,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912665329] [2023-08-04 09:27:38,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:38,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:27:38,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:27:38,958 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 09:27:38,960 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 09:27:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:39,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:27:39,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:27:39,047 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 09:27:39,047 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:27:39,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912665329] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:27:39,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:27:39,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:27:39,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297023694] [2023-08-04 09:27:39,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:27:39,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:27:39,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:27:39,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:27:39,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:27:39,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 404 [2023-08-04 09:27:39,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 66 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 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 09:27:39,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:27:39,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 404 [2023-08-04 09:27:39,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:27:48,606 INFO L124 PetriNetUnfolderBase]: 128541/159664 cut-off events. [2023-08-04 09:27:48,607 INFO L125 PetriNetUnfolderBase]: For 17577/17577 co-relation queries the response was YES. [2023-08-04 09:27:48,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326444 conditions, 159664 events. 128541/159664 cut-off events. For 17577/17577 co-relation queries the response was YES. Maximal size of possible extension queue 3504. Compared 859307 event pairs, 60960 based on Foata normal form. 0/100152 useless extension candidates. Maximal degree in co-relation 190731. Up to 153761 conditions per place. [2023-08-04 09:27:49,626 INFO L140 encePairwiseOnDemand]: 401/404 looper letters, 62 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-04 09:27:49,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 74 transitions, 364 flow [2023-08-04 09:27:49,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:27:49,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:27:49,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 589 transitions. [2023-08-04 09:27:49,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.485973597359736 [2023-08-04 09:27:49,630 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 589 transitions. [2023-08-04 09:27:49,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 589 transitions. [2023-08-04 09:27:49,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:27:49,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 589 transitions. [2023-08-04 09:27:49,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 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 09:27:49,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 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 09:27:49,635 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 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 09:27:49,635 INFO L175 Difference]: Start difference. First operand has 61 places, 66 transitions, 220 flow. Second operand 3 states and 589 transitions. [2023-08-04 09:27:49,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 74 transitions, 364 flow [2023-08-04 09:27:49,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 74 transitions, 350 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:27:49,694 INFO L231 Difference]: Finished difference. Result has 57 places, 67 transitions, 218 flow [2023-08-04 09:27:49,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=57, PETRI_TRANSITIONS=67} [2023-08-04 09:27:49,696 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -2 predicate places. [2023-08-04 09:27:49,696 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 67 transitions, 218 flow [2023-08-04 09:27:49,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 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 09:27:49,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:27:49,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:27:49,703 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 09:27:49,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:27:49,901 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:27:49,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:27:49,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1374311419, now seen corresponding path program 1 times [2023-08-04 09:27:49,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:27:49,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280327173] [2023-08-04 09:27:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:49,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:27:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:49,936 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 09:27:49,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:27:49,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280327173] [2023-08-04 09:27:49,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280327173] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:27:49,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782955088] [2023-08-04 09:27:49,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:49,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:27:49,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:27:49,937 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 09:27:49,963 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 09:27:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:50,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:27:50,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:27:50,025 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 09:27:50,025 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:27:50,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782955088] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:27:50,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:27:50,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:27:50,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571019200] [2023-08-04 09:27:50,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:27:50,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:27:50,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:27:50,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:27:50,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:27:50,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 404 [2023-08-04 09:27:50,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 67 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:27:50,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:27:50,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 404 [2023-08-04 09:27:50,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:27:59,168 INFO L124 PetriNetUnfolderBase]: 128423/160284 cut-off events. [2023-08-04 09:27:59,168 INFO L125 PetriNetUnfolderBase]: For 7194/7194 co-relation queries the response was YES. [2023-08-04 09:27:59,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326912 conditions, 160284 events. 128423/160284 cut-off events. For 7194/7194 co-relation queries the response was YES. Maximal size of possible extension queue 3949. Compared 875197 event pairs, 57964 based on Foata normal form. 0/101199 useless extension candidates. Maximal degree in co-relation 109321. Up to 150557 conditions per place. [2023-08-04 09:28:00,130 INFO L140 encePairwiseOnDemand]: 401/404 looper letters, 66 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-04 09:28:00,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 78 transitions, 376 flow [2023-08-04 09:28:00,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:28:00,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:28:00,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 592 transitions. [2023-08-04 09:28:00,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4884488448844885 [2023-08-04 09:28:00,132 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 592 transitions. [2023-08-04 09:28:00,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 592 transitions. [2023-08-04 09:28:00,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:00,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 592 transitions. [2023-08-04 09:28:00,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 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 09:28:00,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 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 09:28:00,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 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 09:28:00,136 INFO L175 Difference]: Start difference. First operand has 57 places, 67 transitions, 218 flow. Second operand 3 states and 592 transitions. [2023-08-04 09:28:00,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 78 transitions, 376 flow [2023-08-04 09:28:00,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 374 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:28:00,142 INFO L231 Difference]: Finished difference. Result has 59 places, 68 transitions, 228 flow [2023-08-04 09:28:00,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=59, PETRI_TRANSITIONS=68} [2023-08-04 09:28:00,142 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2023-08-04 09:28:00,142 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 68 transitions, 228 flow [2023-08-04 09:28:00,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:28:00,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:00,143 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 09:28:00,151 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 09:28:00,348 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,SelfDestructingSolverStorable11 [2023-08-04 09:28:00,348 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:00,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:00,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1143806180, now seen corresponding path program 1 times [2023-08-04 09:28:00,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:00,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448525959] [2023-08-04 09:28:00,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:00,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:00,393 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 09:28:00,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:00,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448525959] [2023-08-04 09:28:00,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448525959] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:28:00,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392865919] [2023-08-04 09:28:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:00,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:28:00,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:00,394 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 09:28:00,397 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 09:28:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:00,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:28:00,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:28:00,482 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 09:28:00,482 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:28:00,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392865919] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:28:00,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:28:00,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:28:00,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995135553] [2023-08-04 09:28:00,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:28:00,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:28:00,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:00,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:28:00,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:28:00,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 404 [2023-08-04 09:28:00,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 68 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 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 09:28:00,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:00,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 404 [2023-08-04 09:28:00,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:09,037 INFO L124 PetriNetUnfolderBase]: 117593/147402 cut-off events. [2023-08-04 09:28:09,038 INFO L125 PetriNetUnfolderBase]: For 8602/8602 co-relation queries the response was YES. [2023-08-04 09:28:09,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303531 conditions, 147402 events. 117593/147402 cut-off events. For 8602/8602 co-relation queries the response was YES. Maximal size of possible extension queue 3583. Compared 810444 event pairs, 51940 based on Foata normal form. 0/94305 useless extension candidates. Maximal degree in co-relation 105729. Up to 121511 conditions per place. [2023-08-04 09:28:09,663 INFO L140 encePairwiseOnDemand]: 401/404 looper letters, 74 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-08-04 09:28:09,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 86 transitions, 431 flow [2023-08-04 09:28:09,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:28:09,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:28:09,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 599 transitions. [2023-08-04 09:28:09,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49422442244224424 [2023-08-04 09:28:09,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 599 transitions. [2023-08-04 09:28:09,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 599 transitions. [2023-08-04 09:28:09,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:09,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 599 transitions. [2023-08-04 09:28:09,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 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 09:28:09,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 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 09:28:09,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 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 09:28:09,670 INFO L175 Difference]: Start difference. First operand has 59 places, 68 transitions, 228 flow. Second operand 3 states and 599 transitions. [2023-08-04 09:28:09,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 86 transitions, 431 flow [2023-08-04 09:28:09,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 429 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:28:09,681 INFO L231 Difference]: Finished difference. Result has 61 places, 69 transitions, 238 flow [2023-08-04 09:28:09,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=61, PETRI_TRANSITIONS=69} [2023-08-04 09:28:09,682 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-04 09:28:09,682 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 69 transitions, 238 flow [2023-08-04 09:28:09,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 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 09:28:09,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:09,682 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] [2023-08-04 09:28:09,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 09:28:09,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 09:28:09,886 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:09,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:09,887 INFO L85 PathProgramCache]: Analyzing trace with hash -631695698, now seen corresponding path program 1 times [2023-08-04 09:28:09,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:09,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771760197] [2023-08-04 09:28:09,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:09,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:09,926 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 09:28:09,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:09,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771760197] [2023-08-04 09:28:09,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771760197] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:28:09,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394458619] [2023-08-04 09:28:09,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:09,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:28:09,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:09,928 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 09:28:09,957 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 09:28:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:10,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:28:10,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:28:10,030 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 09:28:10,030 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:28:10,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394458619] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:28:10,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:28:10,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:28:10,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742774858] [2023-08-04 09:28:10,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:28:10,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:28:10,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:10,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:28:10,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:28:10,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 404 [2023-08-04 09:28:10,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 69 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 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 09:28:10,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:10,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 404 [2023-08-04 09:28:10,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:18,489 INFO L124 PetriNetUnfolderBase]: 112001/141522 cut-off events. [2023-08-04 09:28:18,489 INFO L125 PetriNetUnfolderBase]: For 14830/14830 co-relation queries the response was YES. [2023-08-04 09:28:18,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299050 conditions, 141522 events. 112001/141522 cut-off events. For 14830/14830 co-relation queries the response was YES. Maximal size of possible extension queue 3120. Compared 783832 event pairs, 47566 based on Foata normal form. 0/93789 useless extension candidates. Maximal degree in co-relation 110047. Up to 106991 conditions per place. [2023-08-04 09:28:19,110 INFO L140 encePairwiseOnDemand]: 401/404 looper letters, 75 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-04 09:28:19,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 443 flow [2023-08-04 09:28:19,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:28:19,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:28:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 599 transitions. [2023-08-04 09:28:19,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49422442244224424 [2023-08-04 09:28:19,112 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 599 transitions. [2023-08-04 09:28:19,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 599 transitions. [2023-08-04 09:28:19,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:19,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 599 transitions. [2023-08-04 09:28:19,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 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 09:28:19,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 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 09:28:19,115 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 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 09:28:19,116 INFO L175 Difference]: Start difference. First operand has 61 places, 69 transitions, 238 flow. Second operand 3 states and 599 transitions. [2023-08-04 09:28:19,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 443 flow [2023-08-04 09:28:19,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 441 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:28:19,228 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 248 flow [2023-08-04 09:28:19,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=63, PETRI_TRANSITIONS=70} [2023-08-04 09:28:19,230 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 4 predicate places. [2023-08-04 09:28:19,230 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 248 flow [2023-08-04 09:28:19,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 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 09:28:19,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:19,230 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] [2023-08-04 09:28:19,234 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 09:28:19,431 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,SelfDestructingSolverStorable13 [2023-08-04 09:28:19,432 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:19,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:19,432 INFO L85 PathProgramCache]: Analyzing trace with hash 730864480, now seen corresponding path program 1 times [2023-08-04 09:28:19,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:19,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834241636] [2023-08-04 09:28:19,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:19,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:19,482 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 09:28:19,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:19,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834241636] [2023-08-04 09:28:19,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834241636] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:28:19,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598551253] [2023-08-04 09:28:19,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:19,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:28:19,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:19,483 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 09:28:19,486 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 09:28:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:19,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:28:19,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:28:19,583 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 09:28:19,583 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:28:19,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598551253] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:28:19,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:28:19,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:28:19,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882984915] [2023-08-04 09:28:19,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:28:19,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:28:19,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:19,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:28:19,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:28:19,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 404 [2023-08-04 09:28:19,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 70 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 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 09:28:19,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:19,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 404 [2023-08-04 09:28:19,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:27,993 INFO L124 PetriNetUnfolderBase]: 112066/142094 cut-off events. [2023-08-04 09:28:27,994 INFO L125 PetriNetUnfolderBase]: For 16912/16912 co-relation queries the response was YES. [2023-08-04 09:28:28,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305181 conditions, 142094 events. 112066/142094 cut-off events. For 16912/16912 co-relation queries the response was YES. Maximal size of possible extension queue 2992. Compared 790044 event pairs, 54515 based on Foata normal form. 0/96274 useless extension candidates. Maximal degree in co-relation 155619. Up to 121678 conditions per place. [2023-08-04 09:28:28,878 INFO L140 encePairwiseOnDemand]: 401/404 looper letters, 76 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-04 09:28:28,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 88 transitions, 455 flow [2023-08-04 09:28:28,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:28:28,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:28:28,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 599 transitions. [2023-08-04 09:28:28,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49422442244224424 [2023-08-04 09:28:28,880 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 599 transitions. [2023-08-04 09:28:28,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 599 transitions. [2023-08-04 09:28:28,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:28,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 599 transitions. [2023-08-04 09:28:28,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 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 09:28:28,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 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 09:28:28,884 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 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 09:28:28,884 INFO L175 Difference]: Start difference. First operand has 63 places, 70 transitions, 248 flow. Second operand 3 states and 599 transitions. [2023-08-04 09:28:28,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 88 transitions, 455 flow [2023-08-04 09:28:30,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 88 transitions, 453 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:28:30,420 INFO L231 Difference]: Finished difference. Result has 65 places, 71 transitions, 258 flow [2023-08-04 09:28:30,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=62, 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=258, PETRI_PLACES=65, PETRI_TRANSITIONS=71} [2023-08-04 09:28:30,421 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2023-08-04 09:28:30,421 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 71 transitions, 258 flow [2023-08-04 09:28:30,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 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 09:28:30,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:30,421 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] [2023-08-04 09:28:30,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 09:28:30,622 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,SelfDestructingSolverStorable14 [2023-08-04 09:28:30,622 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:30,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:30,623 INFO L85 PathProgramCache]: Analyzing trace with hash -173190377, now seen corresponding path program 1 times [2023-08-04 09:28:30,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:30,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248814179] [2023-08-04 09:28:30,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:30,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:30,665 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 09:28:30,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:30,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248814179] [2023-08-04 09:28:30,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248814179] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:28:30,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748638877] [2023-08-04 09:28:30,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:30,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:28:30,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:30,666 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 09:28:30,669 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 09:28:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:30,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:28:30,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:28:30,783 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 09:28:30,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:28:30,797 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 09:28:30,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748638877] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:28:30,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:28:30,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:28:30,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454404289] [2023-08-04 09:28:30,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:28:30,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:28:30,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:30,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:28:30,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:28:30,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 404 [2023-08-04 09:28:30,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 71 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 180.8) internal successors, (904), 5 states have internal predecessors, (904), 0 states have call successors, (0), 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 09:28:30,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:30,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 404 [2023-08-04 09:28:30,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:38,932 INFO L124 PetriNetUnfolderBase]: 105430/133592 cut-off events. [2023-08-04 09:28:38,932 INFO L125 PetriNetUnfolderBase]: For 15139/15139 co-relation queries the response was YES. [2023-08-04 09:28:39,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288514 conditions, 133592 events. 105430/133592 cut-off events. For 15139/15139 co-relation queries the response was YES. Maximal size of possible extension queue 3017. Compared 738033 event pairs, 40990 based on Foata normal form. 3/90955 useless extension candidates. Maximal degree in co-relation 238341. Up to 128318 conditions per place. [2023-08-04 09:28:39,588 INFO L140 encePairwiseOnDemand]: 400/404 looper letters, 65 selfloop transitions, 3 changer transitions 1/79 dead transitions. [2023-08-04 09:28:39,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 79 transitions, 412 flow [2023-08-04 09:28:39,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:28:39,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:28:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 761 transitions. [2023-08-04 09:28:39,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4709158415841584 [2023-08-04 09:28:39,591 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 761 transitions. [2023-08-04 09:28:39,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 761 transitions. [2023-08-04 09:28:39,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:39,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 761 transitions. [2023-08-04 09:28:39,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.25) internal successors, (761), 4 states have internal predecessors, (761), 0 states have call successors, (0), 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 09:28:39,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 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 09:28:39,595 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 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 09:28:39,595 INFO L175 Difference]: Start difference. First operand has 65 places, 71 transitions, 258 flow. Second operand 4 states and 761 transitions. [2023-08-04 09:28:39,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 79 transitions, 412 flow [2023-08-04 09:28:41,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 79 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:28:41,490 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 270 flow [2023-08-04 09:28:41,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=270, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2023-08-04 09:28:41,491 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 10 predicate places. [2023-08-04 09:28:41,491 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 270 flow [2023-08-04 09:28:41,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 180.8) internal successors, (904), 5 states have internal predecessors, (904), 0 states have call successors, (0), 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 09:28:41,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:41,491 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] [2023-08-04 09:28:41,500 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 09:28:41,699 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,SelfDestructingSolverStorable15 [2023-08-04 09:28:41,699 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:41,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:41,700 INFO L85 PathProgramCache]: Analyzing trace with hash -788824380, now seen corresponding path program 1 times [2023-08-04 09:28:41,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:41,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130053328] [2023-08-04 09:28:41,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:41,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:41,762 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 09:28:41,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:41,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130053328] [2023-08-04 09:28:41,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130053328] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:28:41,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929756342] [2023-08-04 09:28:41,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:41,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:28:41,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:41,764 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 09:28:41,766 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 09:28:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:41,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:28:41,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:28:41,870 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 09:28:41,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:28:41,887 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 09:28:41,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929756342] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:28:41,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:28:41,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:28:41,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860514447] [2023-08-04 09:28:41,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:28:41,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:28:41,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:41,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:28:41,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:28:41,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 404 [2023-08-04 09:28:41,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 180.8) internal successors, (904), 5 states have internal predecessors, (904), 0 states have call successors, (0), 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 09:28:41,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:41,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 404 [2023-08-04 09:28:41,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:49,819 INFO L124 PetriNetUnfolderBase]: 100141/126917 cut-off events. [2023-08-04 09:28:49,819 INFO L125 PetriNetUnfolderBase]: For 12469/12469 co-relation queries the response was YES. [2023-08-04 09:28:50,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273727 conditions, 126917 events. 100141/126917 cut-off events. For 12469/12469 co-relation queries the response was YES. Maximal size of possible extension queue 2975. Compared 717336 event pairs, 39194 based on Foata normal form. 27/86395 useless extension candidates. Maximal degree in co-relation 224048. Up to 120769 conditions per place. [2023-08-04 09:28:50,431 INFO L140 encePairwiseOnDemand]: 400/404 looper letters, 73 selfloop transitions, 3 changer transitions 1/87 dead transitions. [2023-08-04 09:28:50,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 87 transitions, 456 flow [2023-08-04 09:28:50,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:28:50,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:28:50,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 769 transitions. [2023-08-04 09:28:50,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47586633663366334 [2023-08-04 09:28:50,433 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 769 transitions. [2023-08-04 09:28:50,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 769 transitions. [2023-08-04 09:28:50,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:50,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 769 transitions. [2023-08-04 09:28:50,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 192.25) internal successors, (769), 4 states have internal predecessors, (769), 0 states have call successors, (0), 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 09:28:50,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 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 09:28:50,438 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 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 09:28:50,438 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 270 flow. Second operand 4 states and 769 transitions. [2023-08-04 09:28:50,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 87 transitions, 456 flow [2023-08-04 09:28:51,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 87 transitions, 446 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:28:51,616 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 274 flow [2023-08-04 09:28:51,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=274, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-08-04 09:28:51,616 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 12 predicate places. [2023-08-04 09:28:51,616 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 274 flow [2023-08-04 09:28:51,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 180.8) internal successors, (904), 5 states have internal predecessors, (904), 0 states have call successors, (0), 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 09:28:51,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:51,617 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:28:51,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-04 09:28:51,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 09:28:51,825 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:51,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:51,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1239637081, now seen corresponding path program 1 times [2023-08-04 09:28:51,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:51,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394341656] [2023-08-04 09:28:51,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:51,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:28:51,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:51,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394341656] [2023-08-04 09:28:51,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394341656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:28:51,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379258445] [2023-08-04 09:28:51,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:51,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:28:51,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:51,927 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:28:51,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 09:28:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:52,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:28:52,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:28:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:28:52,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:28:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:28:52,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379258445] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:28:52,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:28:52,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:28:52,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728741210] [2023-08-04 09:28:52,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:28:52,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:28:52,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:52,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:28:52,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:28:52,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 404 [2023-08-04 09:28:52,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 274 flow. Second operand has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 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 09:28:52,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:52,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 404 [2023-08-04 09:28:52,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:29:00,238 INFO L124 PetriNetUnfolderBase]: 96118/121895 cut-off events. [2023-08-04 09:29:00,238 INFO L125 PetriNetUnfolderBase]: For 11213/11213 co-relation queries the response was YES. [2023-08-04 09:29:00,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261681 conditions, 121895 events. 96118/121895 cut-off events. For 11213/11213 co-relation queries the response was YES. Maximal size of possible extension queue 3116. Compared 667895 event pairs, 37844 based on Foata normal form. 162/83236 useless extension candidates. Maximal degree in co-relation 212335. Up to 108400 conditions per place. [2023-08-04 09:29:00,823 INFO L140 encePairwiseOnDemand]: 400/404 looper letters, 78 selfloop transitions, 3 changer transitions 1/92 dead transitions. [2023-08-04 09:29:00,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 92 transitions, 480 flow [2023-08-04 09:29:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:29:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:29:00,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 774 transitions. [2023-08-04 09:29:00,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47896039603960394 [2023-08-04 09:29:00,825 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 774 transitions. [2023-08-04 09:29:00,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 774 transitions. [2023-08-04 09:29:00,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:29:00,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 774 transitions. [2023-08-04 09:29:00,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 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 09:29:00,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 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 09:29:00,829 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 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 09:29:00,829 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 274 flow. Second operand 4 states and 774 transitions. [2023-08-04 09:29:00,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 92 transitions, 480 flow [2023-08-04 09:29:02,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 92 transitions, 470 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:29:02,026 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 278 flow [2023-08-04 09:29:02,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=278, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2023-08-04 09:29:02,026 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 14 predicate places. [2023-08-04 09:29:02,026 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 278 flow [2023-08-04 09:29:02,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 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 09:29:02,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:29:02,027 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:29:02,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 09:29:02,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:02,227 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:29:02,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:29:02,228 INFO L85 PathProgramCache]: Analyzing trace with hash -437394289, now seen corresponding path program 1 times [2023-08-04 09:29:02,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:29:02,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847605786] [2023-08-04 09:29:02,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:02,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:29:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:29:02,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:29:02,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847605786] [2023-08-04 09:29:02,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847605786] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:29:02,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045875787] [2023-08-04 09:29:02,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:02,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:02,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:29:02,480 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:29:02,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 09:29:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:02,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:29:02,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:29:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:29:02,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:29:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:29:02,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045875787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:29:02,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:29:02,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:29:02,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432742352] [2023-08-04 09:29:02,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:29:02,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:29:02,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:29:02,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:29:02,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:29:02,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 404 [2023-08-04 09:29:02,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 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 09:29:02,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:29:02,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 404 [2023-08-04 09:29:02,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:29:07,411 INFO L124 PetriNetUnfolderBase]: 60737/77488 cut-off events. [2023-08-04 09:29:07,411 INFO L125 PetriNetUnfolderBase]: For 11237/11237 co-relation queries the response was YES. [2023-08-04 09:29:07,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166454 conditions, 77488 events. 60737/77488 cut-off events. For 11237/11237 co-relation queries the response was YES. Maximal size of possible extension queue 1585. Compared 403353 event pairs, 18132 based on Foata normal form. 756/53367 useless extension candidates. Maximal degree in co-relation 152699. Up to 41650 conditions per place. [2023-08-04 09:29:07,740 INFO L140 encePairwiseOnDemand]: 400/404 looper letters, 85 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2023-08-04 09:29:07,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 99 transitions, 525 flow [2023-08-04 09:29:07,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:29:07,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:29:07,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 781 transitions. [2023-08-04 09:29:07,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4832920792079208 [2023-08-04 09:29:07,743 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 781 transitions. [2023-08-04 09:29:07,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 781 transitions. [2023-08-04 09:29:07,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:29:07,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 781 transitions. [2023-08-04 09:29:07,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 195.25) internal successors, (781), 4 states have internal predecessors, (781), 0 states have call successors, (0), 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 09:29:07,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 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 09:29:07,746 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 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 09:29:07,746 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 278 flow. Second operand 4 states and 781 transitions. [2023-08-04 09:29:07,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 99 transitions, 525 flow [2023-08-04 09:29:08,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 99 transitions, 514 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:29:08,254 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 288 flow [2023-08-04 09:29:08,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=288, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2023-08-04 09:29:08,254 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 16 predicate places. [2023-08-04 09:29:08,254 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 288 flow [2023-08-04 09:29:08,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 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 09:29:08,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:29:08,255 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:29:08,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-04 09:29:08,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:08,455 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:29:08,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:29:08,456 INFO L85 PathProgramCache]: Analyzing trace with hash 853254631, now seen corresponding path program 1 times [2023-08-04 09:29:08,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:29:08,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265216021] [2023-08-04 09:29:08,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:08,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:29:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 09:29:08,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:29:08,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265216021] [2023-08-04 09:29:08,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265216021] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:29:08,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136637755] [2023-08-04 09:29:08,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:08,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:08,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:29:08,545 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:29:08,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 09:29:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:08,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:29:08,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:29:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 09:29:08,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:29:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 09:29:08,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136637755] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:29:08,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:29:08,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:29:08,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32598768] [2023-08-04 09:29:08,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:29:08,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:29:08,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:29:08,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:29:08,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:29:08,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 404 [2023-08-04 09:29:08,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 181.6) internal successors, (908), 5 states have internal predecessors, (908), 0 states have call successors, (0), 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 09:29:08,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:29:08,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 404 [2023-08-04 09:29:08,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:29:13,262 INFO L124 PetriNetUnfolderBase]: 57175/72743 cut-off events. [2023-08-04 09:29:13,262 INFO L125 PetriNetUnfolderBase]: For 19926/19926 co-relation queries the response was YES. [2023-08-04 09:29:13,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162459 conditions, 72743 events. 57175/72743 cut-off events. For 19926/19926 co-relation queries the response was YES. Maximal size of possible extension queue 1585. Compared 372387 event pairs, 24135 based on Foata normal form. 495/49745 useless extension candidates. Maximal degree in co-relation 160158. Up to 50108 conditions per place. [2023-08-04 09:29:13,591 INFO L140 encePairwiseOnDemand]: 400/404 looper letters, 86 selfloop transitions, 4 changer transitions 0/100 dead transitions. [2023-08-04 09:29:13,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 100 transitions, 536 flow [2023-08-04 09:29:13,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:29:13,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:29:13,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 781 transitions. [2023-08-04 09:29:13,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4832920792079208 [2023-08-04 09:29:13,593 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 781 transitions. [2023-08-04 09:29:13,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 781 transitions. [2023-08-04 09:29:13,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:29:13,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 781 transitions. [2023-08-04 09:29:13,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 195.25) internal successors, (781), 4 states have internal predecessors, (781), 0 states have call successors, (0), 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 09:29:13,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 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 09:29:13,597 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 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 09:29:13,597 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 288 flow. Second operand 4 states and 781 transitions. [2023-08-04 09:29:13,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 100 transitions, 536 flow [2023-08-04 09:29:14,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 100 transitions, 532 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:29:14,088 INFO L231 Difference]: Finished difference. Result has 79 places, 73 transitions, 304 flow [2023-08-04 09:29:14,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=304, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2023-08-04 09:29:14,088 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 20 predicate places. [2023-08-04 09:29:14,088 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 304 flow [2023-08-04 09:29:14,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.6) internal successors, (908), 5 states have internal predecessors, (908), 0 states have call successors, (0), 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 09:29:14,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:29:14,089 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:29:14,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 09:29:14,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:14,295 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:29:14,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:29:14,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1838871250, now seen corresponding path program 1 times [2023-08-04 09:29:14,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:29:14,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414682507] [2023-08-04 09:29:14,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:14,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:29:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 09:29:14,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:29:14,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414682507] [2023-08-04 09:29:14,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414682507] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:29:14,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708430900] [2023-08-04 09:29:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:14,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:14,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:29:14,363 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:29:14,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 09:29:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:14,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:29:14,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:29:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 09:29:14,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:29:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 09:29:14,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708430900] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:29:14,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:29:14,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:29:14,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459570964] [2023-08-04 09:29:14,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:29:14,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:29:14,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:29:14,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:29:14,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:29:14,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 404 [2023-08-04 09:29:14,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 304 flow. Second operand has 5 states, 5 states have (on average 182.0) internal successors, (910), 5 states have internal predecessors, (910), 0 states have call successors, (0), 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 09:29:14,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:29:14,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 404 [2023-08-04 09:29:14,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:29:19,550 INFO L124 PetriNetUnfolderBase]: 57157/72710 cut-off events. [2023-08-04 09:29:19,550 INFO L125 PetriNetUnfolderBase]: For 20748/20748 co-relation queries the response was YES. [2023-08-04 09:29:19,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166108 conditions, 72710 events. 57157/72710 cut-off events. For 20748/20748 co-relation queries the response was YES. Maximal size of possible extension queue 1585. Compared 372458 event pairs, 31845 based on Foata normal form. 17/49242 useless extension candidates. Maximal degree in co-relation 163764. Up to 68837 conditions per place. [2023-08-04 09:29:19,844 INFO L140 encePairwiseOnDemand]: 400/404 looper letters, 85 selfloop transitions, 3 changer transitions 3/101 dead transitions. [2023-08-04 09:29:19,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 101 transitions, 554 flow [2023-08-04 09:29:19,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:29:19,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:29:19,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 781 transitions. [2023-08-04 09:29:19,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4832920792079208 [2023-08-04 09:29:19,847 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 781 transitions. [2023-08-04 09:29:19,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 781 transitions. [2023-08-04 09:29:19,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:29:19,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 781 transitions. [2023-08-04 09:29:19,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 195.25) internal successors, (781), 4 states have internal predecessors, (781), 0 states have call successors, (0), 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 09:29:19,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 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 09:29:19,851 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 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 09:29:19,851 INFO L175 Difference]: Start difference. First operand has 79 places, 73 transitions, 304 flow. Second operand 4 states and 781 transitions. [2023-08-04 09:29:19,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 101 transitions, 554 flow [2023-08-04 09:29:20,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 101 transitions, 550 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:29:20,753 INFO L231 Difference]: Finished difference. Result has 83 places, 71 transitions, 302 flow [2023-08-04 09:29:20,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=302, PETRI_PLACES=83, PETRI_TRANSITIONS=71} [2023-08-04 09:29:20,753 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 24 predicate places. [2023-08-04 09:29:20,753 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 71 transitions, 302 flow [2023-08-04 09:29:20,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 182.0) internal successors, (910), 5 states have internal predecessors, (910), 0 states have call successors, (0), 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 09:29:20,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:29:20,753 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:29:20,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 09:29:20,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:20,954 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:29:20,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:29:20,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1906883429, now seen corresponding path program 1 times [2023-08-04 09:29:20,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:29:20,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593863095] [2023-08-04 09:29:20,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:20,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:29:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 09:29:21,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:29:21,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593863095] [2023-08-04 09:29:21,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593863095] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:29:21,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:29:21,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:29:21,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237116983] [2023-08-04 09:29:21,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:29:21,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:29:21,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:29:21,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:29:21,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:29:21,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 404 [2023-08-04 09:29:21,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 71 transitions, 302 flow. Second operand has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 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 09:29:21,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:29:21,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 404 [2023-08-04 09:29:21,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:29:25,669 INFO L124 PetriNetUnfolderBase]: 52893/67059 cut-off events. [2023-08-04 09:29:25,669 INFO L125 PetriNetUnfolderBase]: For 18554/18554 co-relation queries the response was YES. [2023-08-04 09:29:25,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149834 conditions, 67059 events. 52893/67059 cut-off events. For 18554/18554 co-relation queries the response was YES. Maximal size of possible extension queue 1412. Compared 335060 event pairs, 27362 based on Foata normal form. 0/47274 useless extension candidates. Maximal degree in co-relation 149598. Up to 50682 conditions per place. [2023-08-04 09:29:26,013 INFO L140 encePairwiseOnDemand]: 400/404 looper letters, 110 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2023-08-04 09:29:26,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 122 transitions, 765 flow [2023-08-04 09:29:26,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:29:26,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:29:26,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 799 transitions. [2023-08-04 09:29:26,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4944306930693069 [2023-08-04 09:29:26,015 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 799 transitions. [2023-08-04 09:29:26,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 799 transitions. [2023-08-04 09:29:26,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:29:26,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 799 transitions. [2023-08-04 09:29:26,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 0 states have call successors, (0), 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 09:29:26,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 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 09:29:26,019 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 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 09:29:26,019 INFO L175 Difference]: Start difference. First operand has 83 places, 71 transitions, 302 flow. Second operand 4 states and 799 transitions. [2023-08-04 09:29:26,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 122 transitions, 765 flow [2023-08-04 09:29:26,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 122 transitions, 748 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-04 09:29:26,848 INFO L231 Difference]: Finished difference. Result has 83 places, 72 transitions, 306 flow [2023-08-04 09:29:26,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=306, PETRI_PLACES=83, PETRI_TRANSITIONS=72} [2023-08-04 09:29:26,848 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 24 predicate places. [2023-08-04 09:29:26,848 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 72 transitions, 306 flow [2023-08-04 09:29:26,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 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 09:29:26,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:29:26,849 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:29:26,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-04 09:29:26,849 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:29:26,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:29:26,849 INFO L85 PathProgramCache]: Analyzing trace with hash -401695747, now seen corresponding path program 1 times [2023-08-04 09:29:26,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:29:26,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473937490] [2023-08-04 09:29:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:26,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:29:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 09:29:26,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:29:26,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473937490] [2023-08-04 09:29:26,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473937490] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:29:26,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:29:26,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:29:26,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249828974] [2023-08-04 09:29:26,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:29:26,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:29:26,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:29:26,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:29:26,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:29:27,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 404 [2023-08-04 09:29:27,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 72 transitions, 306 flow. Second operand has 5 states, 5 states have (on average 178.4) internal successors, (892), 5 states have internal predecessors, (892), 0 states have call successors, (0), 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 09:29:27,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:29:27,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 404 [2023-08-04 09:29:27,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:29:31,565 INFO L124 PetriNetUnfolderBase]: 52890/67058 cut-off events. [2023-08-04 09:29:31,565 INFO L125 PetriNetUnfolderBase]: For 26754/26754 co-relation queries the response was YES. [2023-08-04 09:29:31,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160284 conditions, 67058 events. 52890/67058 cut-off events. For 26754/26754 co-relation queries the response was YES. Maximal size of possible extension queue 1412. Compared 335131 event pairs, 31998 based on Foata normal form. 1/47247 useless extension candidates. Maximal degree in co-relation 160041. Up to 64181 conditions per place. [2023-08-04 09:29:31,907 INFO L140 encePairwiseOnDemand]: 401/404 looper letters, 62 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-04 09:29:31,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 73 transitions, 436 flow [2023-08-04 09:29:31,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:29:31,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:29:31,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2023-08-04 09:29:31,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46864686468646866 [2023-08-04 09:29:31,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2023-08-04 09:29:31,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2023-08-04 09:29:31,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:29:31,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2023-08-04 09:29:31,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 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 09:29:31,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 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 09:29:31,912 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 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 09:29:31,912 INFO L175 Difference]: Start difference. First operand has 83 places, 72 transitions, 306 flow. Second operand 3 states and 568 transitions. [2023-08-04 09:29:31,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 73 transitions, 436 flow [2023-08-04 09:29:32,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 73 transitions, 430 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 09:29:32,358 INFO L231 Difference]: Finished difference. Result has 84 places, 73 transitions, 312 flow [2023-08-04 09:29:32,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=81, 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=312, PETRI_PLACES=84, PETRI_TRANSITIONS=73} [2023-08-04 09:29:32,359 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 25 predicate places. [2023-08-04 09:29:32,359 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 73 transitions, 312 flow [2023-08-04 09:29:32,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 178.4) internal successors, (892), 5 states have internal predecessors, (892), 0 states have call successors, (0), 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 09:29:32,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:29:32,359 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:29:32,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 09:29:32,359 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:29:32,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:29:32,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1976143145, now seen corresponding path program 1 times [2023-08-04 09:29:32,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:29:32,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444852038] [2023-08-04 09:29:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:32,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:29:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-04 09:29:32,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:29:32,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444852038] [2023-08-04 09:29:32,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444852038] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:29:32,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223406262] [2023-08-04 09:29:32,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:32,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:32,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:29:32,469 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:29:32,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 09:29:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:32,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 09:29:32,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:29:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-04 09:29:32,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:29:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-04 09:29:32,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223406262] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-04 09:29:32,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-04 09:29:32,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-04 09:29:32,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023235464] [2023-08-04 09:29:32,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:29:32,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:29:32,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:29:32,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:29:32,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-04 09:29:32,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 404 [2023-08-04 09:29:32,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 312 flow. Second operand has 5 states, 5 states have (on average 175.2) internal successors, (876), 5 states have internal predecessors, (876), 0 states have call successors, (0), 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 09:29:32,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:29:32,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 404 [2023-08-04 09:29:32,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:29:37,255 INFO L124 PetriNetUnfolderBase]: 50037/63641 cut-off events. [2023-08-04 09:29:37,256 INFO L125 PetriNetUnfolderBase]: For 21519/24447 co-relation queries the response was YES. [2023-08-04 09:29:37,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148454 conditions, 63641 events. 50037/63641 cut-off events. For 21519/24447 co-relation queries the response was YES. Maximal size of possible extension queue 1297. Compared 324878 event pairs, 24582 based on Foata normal form. 2928/49680 useless extension candidates. Maximal degree in co-relation 148427. Up to 48390 conditions per place. [2023-08-04 09:29:37,582 INFO L140 encePairwiseOnDemand]: 399/404 looper letters, 109 selfloop transitions, 4 changer transitions 0/122 dead transitions. [2023-08-04 09:29:37,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 122 transitions, 765 flow [2023-08-04 09:29:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:29:37,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:29:37,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 937 transitions. [2023-08-04 09:29:37,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638613861386139 [2023-08-04 09:29:37,584 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 937 transitions. [2023-08-04 09:29:37,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 937 transitions. [2023-08-04 09:29:37,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:29:37,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 937 transitions. [2023-08-04 09:29:37,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 187.4) internal successors, (937), 5 states have internal predecessors, (937), 0 states have call successors, (0), 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 09:29:37,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 404.0) internal successors, (2424), 6 states have internal predecessors, (2424), 0 states have call successors, (0), 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 09:29:37,587 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 404.0) internal successors, (2424), 6 states have internal predecessors, (2424), 0 states have call successors, (0), 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 09:29:37,587 INFO L175 Difference]: Start difference. First operand has 84 places, 73 transitions, 312 flow. Second operand 5 states and 937 transitions. [2023-08-04 09:29:37,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 122 transitions, 765 flow [2023-08-04 09:29:37,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 122 transitions, 761 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:29:37,941 INFO L231 Difference]: Finished difference. Result has 88 places, 74 transitions, 324 flow [2023-08-04 09:29:37,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=324, PETRI_PLACES=88, PETRI_TRANSITIONS=74} [2023-08-04 09:29:37,942 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 29 predicate places. [2023-08-04 09:29:37,942 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 74 transitions, 324 flow [2023-08-04 09:29:37,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 175.2) internal successors, (876), 5 states have internal predecessors, (876), 0 states have call successors, (0), 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 09:29:37,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:29:37,942 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:29:37,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-04 09:29:38,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:38,143 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:29:38,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:29:38,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1998538090, now seen corresponding path program 1 times [2023-08-04 09:29:38,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:29:38,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452818139] [2023-08-04 09:29:38,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:38,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:29:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-04 09:29:38,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:29:38,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452818139] [2023-08-04 09:29:38,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452818139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:29:38,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688424912] [2023-08-04 09:29:38,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:38,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:38,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:29:38,259 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:29:38,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 09:29:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:38,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 09:29:38,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:29:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-04 09:29:38,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:29:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-04 09:29:38,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688424912] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-04 09:29:38,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-04 09:29:38,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-04 09:29:38,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224713280] [2023-08-04 09:29:38,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:29:38,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:29:38,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:29:38,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:29:38,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-04 09:29:38,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 404 [2023-08-04 09:29:38,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 74 transitions, 324 flow. Second operand has 5 states, 5 states have (on average 175.6) internal successors, (878), 5 states have internal predecessors, (878), 0 states have call successors, (0), 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 09:29:38,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:29:38,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 404 [2023-08-04 09:29:38,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:29:43,005 INFO L124 PetriNetUnfolderBase]: 47136/60731 cut-off events. [2023-08-04 09:29:43,005 INFO L125 PetriNetUnfolderBase]: For 27087/32936 co-relation queries the response was YES. [2023-08-04 09:29:43,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154192 conditions, 60731 events. 47136/60731 cut-off events. For 27087/32936 co-relation queries the response was YES. Maximal size of possible extension queue 1199. Compared 314785 event pairs, 24603 based on Foata normal form. 5849/52593 useless extension candidates. Maximal degree in co-relation 154156. Up to 46124 conditions per place. [2023-08-04 09:29:43,324 INFO L140 encePairwiseOnDemand]: 399/404 looper letters, 108 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2023-08-04 09:29:43,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 121 transitions, 759 flow [2023-08-04 09:29:43,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:29:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:29:43,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 934 transitions. [2023-08-04 09:29:43,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4623762376237624 [2023-08-04 09:29:43,326 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 934 transitions. [2023-08-04 09:29:43,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 934 transitions. [2023-08-04 09:29:43,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:29:43,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 934 transitions. [2023-08-04 09:29:43,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 186.8) internal successors, (934), 5 states have internal predecessors, (934), 0 states have call successors, (0), 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 09:29:43,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 404.0) internal successors, (2424), 6 states have internal predecessors, (2424), 0 states have call successors, (0), 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 09:29:43,330 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 404.0) internal successors, (2424), 6 states have internal predecessors, (2424), 0 states have call successors, (0), 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 09:29:43,330 INFO L175 Difference]: Start difference. First operand has 88 places, 74 transitions, 324 flow. Second operand 5 states and 934 transitions. [2023-08-04 09:29:43,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 121 transitions, 759 flow [2023-08-04 09:29:43,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 121 transitions, 748 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 09:29:43,709 INFO L231 Difference]: Finished difference. Result has 90 places, 75 transitions, 332 flow [2023-08-04 09:29:43,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=90, PETRI_TRANSITIONS=75} [2023-08-04 09:29:43,710 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 31 predicate places. [2023-08-04 09:29:43,710 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 75 transitions, 332 flow [2023-08-04 09:29:43,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 175.6) internal successors, (878), 5 states have internal predecessors, (878), 0 states have call successors, (0), 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 09:29:43,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:29:43,710 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:29:43,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-04 09:29:43,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:43,911 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:29:43,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:29:43,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1394723960, now seen corresponding path program 1 times [2023-08-04 09:29:43,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:29:43,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134048247] [2023-08-04 09:29:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:43,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:29:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 09:29:44,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:29:44,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134048247] [2023-08-04 09:29:44,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134048247] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:29:44,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622119756] [2023-08-04 09:29:44,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:44,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:44,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:29:44,012 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:29:44,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-04 09:29:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:44,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 09:29:44,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:29:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-04 09:29:44,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:29:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-04 09:29:44,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622119756] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:29:44,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:29:44,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-08-04 09:29:44,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241065992] [2023-08-04 09:29:44,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:29:44,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-04 09:29:44,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:29:44,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-04 09:29:44,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-08-04 09:29:44,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 404 [2023-08-04 09:29:44,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 75 transitions, 332 flow. Second operand has 9 states, 9 states have (on average 170.77777777777777) internal successors, (1537), 9 states have internal predecessors, (1537), 0 states have call successors, (0), 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 09:29:44,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:29:44,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 404 [2023-08-04 09:29:44,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:29:49,941 INFO L124 PetriNetUnfolderBase]: 56264/72768 cut-off events. [2023-08-04 09:29:49,941 INFO L125 PetriNetUnfolderBase]: For 43265/50615 co-relation queries the response was YES. [2023-08-04 09:29:50,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196130 conditions, 72768 events. 56264/72768 cut-off events. For 43265/50615 co-relation queries the response was YES. Maximal size of possible extension queue 1266. Compared 381687 event pairs, 24684 based on Foata normal form. 7350/66857 useless extension candidates. Maximal degree in co-relation 196093. Up to 43987 conditions per place. [2023-08-04 09:29:50,330 INFO L140 encePairwiseOnDemand]: 397/404 looper letters, 190 selfloop transitions, 10 changer transitions 0/208 dead transitions. [2023-08-04 09:29:50,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 208 transitions, 1350 flow [2023-08-04 09:29:50,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 09:29:50,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 09:29:50,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1325 transitions. [2023-08-04 09:29:50,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4685289957567185 [2023-08-04 09:29:50,333 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1325 transitions. [2023-08-04 09:29:50,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1325 transitions. [2023-08-04 09:29:50,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:29:50,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1325 transitions. [2023-08-04 09:29:50,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 189.28571428571428) internal successors, (1325), 7 states have internal predecessors, (1325), 0 states have call successors, (0), 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 09:29:50,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 404.0) internal successors, (3232), 8 states have internal predecessors, (3232), 0 states have call successors, (0), 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 09:29:50,337 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 404.0) internal successors, (3232), 8 states have internal predecessors, (3232), 0 states have call successors, (0), 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 09:29:50,338 INFO L175 Difference]: Start difference. First operand has 90 places, 75 transitions, 332 flow. Second operand 7 states and 1325 transitions. [2023-08-04 09:29:50,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 208 transitions, 1350 flow [2023-08-04 09:29:50,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 208 transitions, 1333 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-04 09:29:50,840 INFO L231 Difference]: Finished difference. Result has 95 places, 80 transitions, 372 flow [2023-08-04 09:29:50,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=372, PETRI_PLACES=95, PETRI_TRANSITIONS=80} [2023-08-04 09:29:50,840 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 36 predicate places. [2023-08-04 09:29:50,840 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 80 transitions, 372 flow [2023-08-04 09:29:50,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 170.77777777777777) internal successors, (1537), 9 states have internal predecessors, (1537), 0 states have call successors, (0), 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 09:29:50,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:29:50,841 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:29:50,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-04 09:29:51,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-04 09:29:51,042 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:29:51,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:29:51,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1342117726, now seen corresponding path program 1 times [2023-08-04 09:29:51,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:29:51,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844002725] [2023-08-04 09:29:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:51,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:29:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-04 09:29:52,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:29:52,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844002725] [2023-08-04 09:29:52,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844002725] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:29:52,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454307075] [2023-08-04 09:29:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:52,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:52,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:29:52,221 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:29:52,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-04 09:29:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:52,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-04 09:29:52,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:29:52,426 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-04 09:29:52,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 09:29:52,473 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-04 09:29:52,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 09:29:52,525 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-04 09:29:52,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 09:29:52,656 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-04 09:29:52,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 09:29:52,719 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-04 09:29:52,776 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-04 09:29:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 09:29:52,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:29:53,810 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (forall ((v_ArrVal_1052 (Array Int Int))) (< c_~max~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1052) c_~A~0.base) c_~A~0.offset)))) (.cse3 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset))) (and (or (let ((.cse1 (+ c_~min~0 1))) (and (forall ((v_ArrVal_1052 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1052) c_~A~0.base) c_~A~0.offset))) (or (= c_~min~0 .cse0) (<= .cse0 c_~max~0) (<= .cse1 .cse0)))) (or .cse2 (= c_~max~0 c_~min~0) (<= .cse1 c_~max~0)))) (< .cse3 c_~min~0)) (or (let ((.cse4 (+ .cse3 1))) (and (forall ((v_ArrVal_1052 (Array Int Int))) (let ((.cse5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1052) c_~A~0.base) c_~A~0.offset))) (or (<= .cse4 .cse5) (<= .cse5 c_~max~0) (= .cse3 .cse5)))) (or (<= .cse4 c_~max~0) .cse2 (= .cse3 c_~max~0)))) (<= c_~min~0 .cse3)))) is different from false [2023-08-04 09:29:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 5 refuted. 4 times theorem prover too weak. 22 trivial. 2 not checked. [2023-08-04 09:29:56,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454307075] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:29:56,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:29:56,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 13] total 25 [2023-08-04 09:29:56,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371747917] [2023-08-04 09:29:56,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:29:56,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-04 09:29:56,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:29:56,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-04 09:29:56,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=427, Unknown=12, NotChecked=46, Total=650 [2023-08-04 09:29:56,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 404 [2023-08-04 09:29:56,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 80 transitions, 372 flow. Second operand has 26 states, 26 states have (on average 128.42307692307693) internal successors, (3339), 26 states have internal predecessors, (3339), 0 states have call successors, (0), 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 09:29:56,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:29:56,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 404 [2023-08-04 09:29:56,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:30:15,500 INFO L124 PetriNetUnfolderBase]: 178394/231438 cut-off events. [2023-08-04 09:30:15,501 INFO L125 PetriNetUnfolderBase]: For 216196/216196 co-relation queries the response was YES. [2023-08-04 09:30:16,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689731 conditions, 231438 events. 178394/231438 cut-off events. For 216196/216196 co-relation queries the response was YES. Maximal size of possible extension queue 3124. Compared 1293987 event pairs, 10495 based on Foata normal form. 2/193973 useless extension candidates. Maximal degree in co-relation 689692. Up to 120750 conditions per place. [2023-08-04 09:30:16,433 INFO L140 encePairwiseOnDemand]: 389/404 looper letters, 0 selfloop transitions, 0 changer transitions 442/442 dead transitions. [2023-08-04 09:30:16,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 442 transitions, 2995 flow [2023-08-04 09:30:16,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-04 09:30:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-04 09:30:16,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3209 transitions. [2023-08-04 09:30:16,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34535083943176925 [2023-08-04 09:30:16,438 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3209 transitions. [2023-08-04 09:30:16,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3209 transitions. [2023-08-04 09:30:16,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:30:16,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3209 transitions. [2023-08-04 09:30:16,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 139.52173913043478) internal successors, (3209), 23 states have internal predecessors, (3209), 0 states have call successors, (0), 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 09:30:16,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 404.0) internal successors, (9696), 24 states have internal predecessors, (9696), 0 states have call successors, (0), 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 09:30:16,452 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 404.0) internal successors, (9696), 24 states have internal predecessors, (9696), 0 states have call successors, (0), 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 09:30:16,452 INFO L175 Difference]: Start difference. First operand has 95 places, 80 transitions, 372 flow. Second operand 23 states and 3209 transitions. [2023-08-04 09:30:16,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 442 transitions, 2995 flow [2023-08-04 09:30:24,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 442 transitions, 2918 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-08-04 09:30:24,466 INFO L231 Difference]: Finished difference. Result has 111 places, 0 transitions, 0 flow [2023-08-04 09:30:24,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=0, PETRI_PLACES=111, PETRI_TRANSITIONS=0} [2023-08-04 09:30:24,467 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 52 predicate places. [2023-08-04 09:30:24,467 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 0 transitions, 0 flow [2023-08-04 09:30:24,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 128.42307692307693) internal successors, (3339), 26 states have internal predecessors, (3339), 0 states have call successors, (0), 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 09:30:24,468 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:30:24,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-04 09:30:24,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-04 09:30:24,668 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:30:24,669 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:30:24,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 223 transitions, 536 flow [2023-08-04 09:30:24,904 INFO L124 PetriNetUnfolderBase]: 855/4026 cut-off events. [2023-08-04 09:30:24,904 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:30:24,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4700 conditions, 4026 events. 855/4026 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 31980 event pairs, 33 based on Foata normal form. 0/3415 useless extension candidates. Maximal degree in co-relation 2382. Up to 192 conditions per place. [2023-08-04 09:30:24,917 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 223 transitions, 536 flow [2023-08-04 09:30:24,929 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 223 transitions, 536 flow [2023-08-04 09:30:24,929 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:30:24,929 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 223 transitions, 536 flow [2023-08-04 09:30:24,929 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 223 transitions, 536 flow [2023-08-04 09:30:24,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 223 transitions, 536 flow [2023-08-04 09:30:25,219 INFO L124 PetriNetUnfolderBase]: 855/4026 cut-off events. [2023-08-04 09:30:25,220 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:30:25,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4700 conditions, 4026 events. 855/4026 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 31980 event pairs, 33 based on Foata normal form. 0/3415 useless extension candidates. Maximal degree in co-relation 2382. Up to 192 conditions per place. [2023-08-04 09:30:25,289 INFO L119 LiptonReduction]: Number of co-enabled transitions 10168 [2023-08-04 09:30:29,779 INFO L134 LiptonReduction]: Checked pairs total: 22191 [2023-08-04 09:30:29,780 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-08-04 09:30:29,781 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:30:29,784 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;@5d862f39, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:30:29,784 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:30:29,790 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:30:29,790 INFO L124 PetriNetUnfolderBase]: 12/110 cut-off events. [2023-08-04 09:30:29,790 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 09:30:29,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:30:29,790 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 09:30:29,790 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 09:30:29,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:30:29,791 INFO L85 PathProgramCache]: Analyzing trace with hash 277526189, now seen corresponding path program 1 times [2023-08-04 09:30:29,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:30:29,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722835390] [2023-08-04 09:30:29,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:29,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:30:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:30:29,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:30:29,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722835390] [2023-08-04 09:30:29,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722835390] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:30:29,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911136093] [2023-08-04 09:30:29,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:29,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:30:29,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:30:29,833 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:30:29,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-04 09:30:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:29,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 09:30:29,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:30:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:30:29,962 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:30:29,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911136093] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:30:29,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:30:29,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 09:30:29,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164011341] [2023-08-04 09:30:29,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:30:29,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:30:29,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:30:29,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:30:29,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 09:30:29,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 404 [2023-08-04 09:30:29,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 69 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 175.8) internal successors, (879), 5 states have internal predecessors, (879), 0 states have call successors, (0), 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 09:30:29,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:30:29,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 404 [2023-08-04 09:30:29,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:30:39,401 INFO L124 PetriNetUnfolderBase]: 130176/162625 cut-off events. [2023-08-04 09:30:39,402 INFO L125 PetriNetUnfolderBase]: For 19112/19112 co-relation queries the response was YES. [2023-08-04 09:30:39,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332193 conditions, 162625 events. 130176/162625 cut-off events. For 19112/19112 co-relation queries the response was YES. Maximal size of possible extension queue 3459. Compared 881092 event pairs, 48740 based on Foata normal form. 0/102542 useless extension candidates. Maximal degree in co-relation 105954. Up to 156055 conditions per place. [2023-08-04 09:30:39,844 INFO L140 encePairwiseOnDemand]: 399/404 looper letters, 32 selfloop transitions, 5 changer transitions 31/77 dead transitions. [2023-08-04 09:30:39,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 77 transitions, 370 flow [2023-08-04 09:30:39,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:30:39,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:30:39,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 937 transitions. [2023-08-04 09:30:39,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638613861386139 [2023-08-04 09:30:39,845 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 937 transitions. [2023-08-04 09:30:39,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 937 transitions. [2023-08-04 09:30:39,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:30:39,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 937 transitions. [2023-08-04 09:30:39,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 187.4) internal successors, (937), 5 states have internal predecessors, (937), 0 states have call successors, (0), 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 09:30:39,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 404.0) internal successors, (2424), 6 states have internal predecessors, (2424), 0 states have call successors, (0), 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 09:30:39,848 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 404.0) internal successors, (2424), 6 states have internal predecessors, (2424), 0 states have call successors, (0), 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 09:30:39,848 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 228 flow. Second operand 5 states and 937 transitions. [2023-08-04 09:30:39,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 77 transitions, 370 flow [2023-08-04 09:30:39,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 77 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:30:39,857 INFO L231 Difference]: Finished difference. Result has 60 places, 39 transitions, 125 flow [2023-08-04 09:30:39,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=125, PETRI_PLACES=60, PETRI_TRANSITIONS=39} [2023-08-04 09:30:39,858 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-08-04 09:30:39,858 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 39 transitions, 125 flow [2023-08-04 09:30:39,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 175.8) internal successors, (879), 5 states have internal predecessors, (879), 0 states have call successors, (0), 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 09:30:39,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:30:39,858 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:30:39,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-04 09:30:40,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-04 09:30:40,059 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:30:40,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:30:40,060 INFO L85 PathProgramCache]: Analyzing trace with hash -422950096, now seen corresponding path program 1 times [2023-08-04 09:30:40,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:30:40,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103835464] [2023-08-04 09:30:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:40,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:30:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:30:40,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:30:40,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103835464] [2023-08-04 09:30:40,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103835464] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:30:40,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:30:40,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:30:40,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318171939] [2023-08-04 09:30:40,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:30:40,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:30:40,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:30:40,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:30:40,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:30:40,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 404 [2023-08-04 09:30:40,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 39 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 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 09:30:40,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:30:40,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 404 [2023-08-04 09:30:40,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:30:41,571 INFO L124 PetriNetUnfolderBase]: 17633/21735 cut-off events. [2023-08-04 09:30:41,571 INFO L125 PetriNetUnfolderBase]: For 1170/1170 co-relation queries the response was YES. [2023-08-04 09:30:41,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44752 conditions, 21735 events. 17633/21735 cut-off events. For 1170/1170 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 88202 event pairs, 8517 based on Foata normal form. 1/13576 useless extension candidates. Maximal degree in co-relation 19471. Up to 21183 conditions per place. [2023-08-04 09:30:41,633 INFO L140 encePairwiseOnDemand]: 401/404 looper letters, 30 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-04 09:30:41,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 192 flow [2023-08-04 09:30:41,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:30:41,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:30:41,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2023-08-04 09:30:41,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45957095709570955 [2023-08-04 09:30:41,634 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2023-08-04 09:30:41,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2023-08-04 09:30:41,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:30:41,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2023-08-04 09:30:41,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 09:30:41,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 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 09:30:41,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 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 09:30:41,636 INFO L175 Difference]: Start difference. First operand has 60 places, 39 transitions, 125 flow. Second operand 3 states and 557 transitions. [2023-08-04 09:30:41,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 192 flow [2023-08-04 09:30:41,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 41 transitions, 187 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 09:30:41,638 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 119 flow [2023-08-04 09:30:41,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2023-08-04 09:30:41,639 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -11 predicate places. [2023-08-04 09:30:41,639 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 119 flow [2023-08-04 09:30:41,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 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 09:30:41,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:30:41,639 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:30:41,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-04 09:30:41,639 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:30:41,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:30:41,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1766718121, now seen corresponding path program 1 times [2023-08-04 09:30:41,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:30:41,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727994763] [2023-08-04 09:30:41,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:41,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:30:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:30:41,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:30:41,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727994763] [2023-08-04 09:30:41,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727994763] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:30:41,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222624036] [2023-08-04 09:30:41,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:41,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:30:41,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:30:41,676 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:30:41,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-04 09:30:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:41,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:30:41,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:30:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:30:41,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:30:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:30:41,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222624036] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:30:41,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:30:41,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:30:41,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832831370] [2023-08-04 09:30:41,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:30:41,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:30:41,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:30:41,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:30:41,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:30:41,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 404 [2023-08-04 09:30:41,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 119 flow. Second operand has 5 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 0 states have call successors, (0), 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 09:30:41,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:30:41,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 404 [2023-08-04 09:30:41,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:30:42,727 INFO L124 PetriNetUnfolderBase]: 14117/17202 cut-off events. [2023-08-04 09:30:42,727 INFO L125 PetriNetUnfolderBase]: For 733/733 co-relation queries the response was YES. [2023-08-04 09:30:42,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35221 conditions, 17202 events. 14117/17202 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 65248 event pairs, 5061 based on Foata normal form. 3/10638 useless extension candidates. Maximal degree in co-relation 25827. Up to 16755 conditions per place. [2023-08-04 09:30:42,781 INFO L140 encePairwiseOnDemand]: 401/404 looper letters, 32 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2023-08-04 09:30:42,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 44 transitions, 200 flow [2023-08-04 09:30:42,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:30:42,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:30:42,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 732 transitions. [2023-08-04 09:30:42,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452970297029703 [2023-08-04 09:30:42,782 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 732 transitions. [2023-08-04 09:30:42,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 732 transitions. [2023-08-04 09:30:42,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:30:42,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 732 transitions. [2023-08-04 09:30:42,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 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 09:30:42,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 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 09:30:42,785 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 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 09:30:42,785 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 119 flow. Second operand 4 states and 732 transitions. [2023-08-04 09:30:42,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 44 transitions, 200 flow [2023-08-04 09:30:42,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 44 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:30:42,786 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 116 flow [2023-08-04 09:30:42,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2023-08-04 09:30:42,787 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -10 predicate places. [2023-08-04 09:30:42,787 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 116 flow [2023-08-04 09:30:42,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 0 states have call successors, (0), 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 09:30:42,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:30:42,787 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:30:42,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-04 09:30:42,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:30:42,992 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:30:42,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:30:42,992 INFO L85 PathProgramCache]: Analyzing trace with hash 472915357, now seen corresponding path program 1 times [2023-08-04 09:30:42,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:30:42,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184183814] [2023-08-04 09:30:42,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:42,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:30:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:30:43,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:30:43,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184183814] [2023-08-04 09:30:43,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184183814] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:30:43,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112333660] [2023-08-04 09:30:43,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:43,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:30:43,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:30:43,031 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:30:43,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-04 09:30:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:43,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 09:30:43,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:30:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:30:43,173 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:30:43,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112333660] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:30:43,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:30:43,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 09:30:43,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482107440] [2023-08-04 09:30:43,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:30:43,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:30:43,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:30:43,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:30:43,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 09:30:43,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 404 [2023-08-04 09:30:43,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 0 states have call successors, (0), 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 09:30:43,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:30:43,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 404 [2023-08-04 09:30:43,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:30:44,030 INFO L124 PetriNetUnfolderBase]: 13685/16941 cut-off events. [2023-08-04 09:30:44,030 INFO L125 PetriNetUnfolderBase]: For 545/545 co-relation queries the response was YES. [2023-08-04 09:30:44,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34534 conditions, 16941 events. 13685/16941 cut-off events. For 545/545 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 69840 event pairs, 1987 based on Foata normal form. 0/10608 useless extension candidates. Maximal degree in co-relation 14437. Up to 15510 conditions per place. [2023-08-04 09:30:44,089 INFO L140 encePairwiseOnDemand]: 400/404 looper letters, 45 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2023-08-04 09:30:44,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 58 transitions, 256 flow [2023-08-04 09:30:44,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:30:44,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:30:44,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 920 transitions. [2023-08-04 09:30:44,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45544554455445546 [2023-08-04 09:30:44,091 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 920 transitions. [2023-08-04 09:30:44,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 920 transitions. [2023-08-04 09:30:44,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:30:44,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 920 transitions. [2023-08-04 09:30:44,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 0 states have call successors, (0), 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 09:30:44,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 404.0) internal successors, (2424), 6 states have internal predecessors, (2424), 0 states have call successors, (0), 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 09:30:44,094 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 404.0) internal successors, (2424), 6 states have internal predecessors, (2424), 0 states have call successors, (0), 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 09:30:44,094 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 116 flow. Second operand 5 states and 920 transitions. [2023-08-04 09:30:44,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 58 transitions, 256 flow [2023-08-04 09:30:44,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 58 transitions, 249 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:30:44,095 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 128 flow [2023-08-04 09:30:44,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2023-08-04 09:30:44,096 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -10 predicate places. [2023-08-04 09:30:44,096 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 128 flow [2023-08-04 09:30:44,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 0 states have call successors, (0), 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 09:30:44,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:30:44,096 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:30:44,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-04 09:30:44,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:30:44,298 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:30:44,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:30:44,298 INFO L85 PathProgramCache]: Analyzing trace with hash 2117558590, now seen corresponding path program 1 times [2023-08-04 09:30:44,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:30:44,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701602086] [2023-08-04 09:30:44,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:44,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:30:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 09:30:44,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:30:44,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701602086] [2023-08-04 09:30:44,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701602086] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:30:44,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:30:44,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:30:44,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271765134] [2023-08-04 09:30:44,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:30:44,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:30:44,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:30:44,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:30:44,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:30:44,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 404 [2023-08-04 09:30:44,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 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 09:30:44,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:30:44,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 404 [2023-08-04 09:30:44,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:30:45,153 INFO L124 PetriNetUnfolderBase]: 13097/16128 cut-off events. [2023-08-04 09:30:45,153 INFO L125 PetriNetUnfolderBase]: For 742/742 co-relation queries the response was YES. [2023-08-04 09:30:45,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33079 conditions, 16128 events. 13097/16128 cut-off events. For 742/742 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 65596 event pairs, 6325 based on Foata normal form. 9/10088 useless extension candidates. Maximal degree in co-relation 14062. Up to 15368 conditions per place. [2023-08-04 09:30:45,211 INFO L140 encePairwiseOnDemand]: 401/404 looper letters, 35 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-04 09:30:45,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 213 flow [2023-08-04 09:30:45,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:30:45,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:30:45,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-08-04 09:30:45,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628712871287129 [2023-08-04 09:30:45,213 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-08-04 09:30:45,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-08-04 09:30:45,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:30:45,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-08-04 09:30:45,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 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 09:30:45,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 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 09:30:45,215 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 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 09:30:45,215 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 128 flow. Second operand 3 states and 561 transitions. [2023-08-04 09:30:45,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 213 flow [2023-08-04 09:30:45,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 45 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:30:45,216 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 126 flow [2023-08-04 09:30:45,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2023-08-04 09:30:45,217 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -9 predicate places. [2023-08-04 09:30:45,217 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 126 flow [2023-08-04 09:30:45,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 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 09:30:45,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:30:45,217 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:30:45,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-04 09:30:45,218 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:30:45,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:30:45,218 INFO L85 PathProgramCache]: Analyzing trace with hash -390149673, now seen corresponding path program 1 times [2023-08-04 09:30:45,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:30:45,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737507143] [2023-08-04 09:30:45,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:45,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:30:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 09:30:45,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:30:45,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737507143] [2023-08-04 09:30:45,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737507143] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:30:45,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360860448] [2023-08-04 09:30:45,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:45,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:30:45,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:30:45,259 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:30:45,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-04 09:30:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:45,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:30:45,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:30:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 09:30:45,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:30:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 09:30:45,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360860448] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:30:45,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:30:45,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:30:45,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248698242] [2023-08-04 09:30:45,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:30:45,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:30:45,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:30:45,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:30:45,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:30:45,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 404 [2023-08-04 09:30:45,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 177.8) internal successors, (889), 5 states have internal predecessors, (889), 0 states have call successors, (0), 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 09:30:45,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:30:45,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 404 [2023-08-04 09:30:45,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:30:46,204 INFO L124 PetriNetUnfolderBase]: 10613/12969 cut-off events. [2023-08-04 09:30:46,204 INFO L125 PetriNetUnfolderBase]: For 643/643 co-relation queries the response was YES. [2023-08-04 09:30:46,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26626 conditions, 12969 events. 10613/12969 cut-off events. For 643/643 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 50795 event pairs, 3823 based on Foata normal form. 27/8054 useless extension candidates. Maximal degree in co-relation 11713. Up to 11786 conditions per place. [2023-08-04 09:30:46,239 INFO L140 encePairwiseOnDemand]: 401/404 looper letters, 41 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-04 09:30:46,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 241 flow [2023-08-04 09:30:46,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:30:46,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:30:46,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 740 transitions. [2023-08-04 09:30:46,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45792079207920794 [2023-08-04 09:30:46,240 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 740 transitions. [2023-08-04 09:30:46,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 740 transitions. [2023-08-04 09:30:46,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:30:46,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 740 transitions. [2023-08-04 09:30:46,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 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 09:30:46,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 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 09:30:46,242 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 404.0) internal successors, (2020), 5 states have internal predecessors, (2020), 0 states have call successors, (0), 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 09:30:46,242 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 126 flow. Second operand 4 states and 740 transitions. [2023-08-04 09:30:46,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 241 flow [2023-08-04 09:30:46,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 237 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:30:46,244 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 123 flow [2023-08-04 09:30:46,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2023-08-04 09:30:46,244 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -8 predicate places. [2023-08-04 09:30:46,244 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 123 flow [2023-08-04 09:30:46,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 177.8) internal successors, (889), 5 states have internal predecessors, (889), 0 states have call successors, (0), 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 09:30:46,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:30:46,244 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:30:46,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-04 09:30:46,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-04 09:30:46,445 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:30:46,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:30:46,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1536952207, now seen corresponding path program 1 times [2023-08-04 09:30:46,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:30:46,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622066132] [2023-08-04 09:30:46,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:46,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:30:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 09:30:46,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:30:46,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622066132] [2023-08-04 09:30:46,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622066132] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:30:46,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412121834] [2023-08-04 09:30:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:46,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:30:46,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:30:46,487 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:30:46,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-04 09:30:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:46,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 09:30:46,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:30:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 09:30:46,653 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:30:46,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412121834] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:30:46,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:30:46,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 09:30:46,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010554823] [2023-08-04 09:30:46,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:30:46,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:30:46,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:30:46,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:30:46,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 09:30:46,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 404 [2023-08-04 09:30:46,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 177.8) internal successors, (889), 5 states have internal predecessors, (889), 0 states have call successors, (0), 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 09:30:46,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:30:46,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 404 [2023-08-04 09:30:46,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:30:47,185 INFO L124 PetriNetUnfolderBase]: 8561/10431 cut-off events. [2023-08-04 09:30:47,185 INFO L125 PetriNetUnfolderBase]: For 652/652 co-relation queries the response was YES. [2023-08-04 09:30:47,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21604 conditions, 10431 events. 8561/10431 cut-off events. For 652/652 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 37362 event pairs, 460 based on Foata normal form. 324/6677 useless extension candidates. Maximal degree in co-relation 11767. Up to 4428 conditions per place. [2023-08-04 09:30:47,201 INFO L140 encePairwiseOnDemand]: 401/404 looper letters, 0 selfloop transitions, 0 changer transitions 65/65 dead transitions. [2023-08-04 09:30:47,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 65 transitions, 293 flow [2023-08-04 09:30:47,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:30:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:30:47,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 927 transitions. [2023-08-04 09:30:47,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45891089108910893 [2023-08-04 09:30:47,202 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 927 transitions. [2023-08-04 09:30:47,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 927 transitions. [2023-08-04 09:30:47,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:30:47,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 927 transitions. [2023-08-04 09:30:47,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.4) internal successors, (927), 5 states have internal predecessors, (927), 0 states have call successors, (0), 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 09:30:47,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 404.0) internal successors, (2424), 6 states have internal predecessors, (2424), 0 states have call successors, (0), 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 09:30:47,204 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 404.0) internal successors, (2424), 6 states have internal predecessors, (2424), 0 states have call successors, (0), 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 09:30:47,204 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 123 flow. Second operand 5 states and 927 transitions. [2023-08-04 09:30:47,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 65 transitions, 293 flow [2023-08-04 09:30:47,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 286 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:30:47,211 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2023-08-04 09:30:47,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=50, PETRI_TRANSITIONS=0} [2023-08-04 09:30:47,211 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -9 predicate places. [2023-08-04 09:30:47,211 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2023-08-04 09:30:47,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 177.8) internal successors, (889), 5 states have internal predecessors, (889), 0 states have call successors, (0), 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 09:30:47,212 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:30:47,212 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:30:47,212 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:30:47,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-04 09:30:47,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-04 09:30:47,412 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:30:47,413 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (2/2) [2023-08-04 09:30:47,413 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 09:30:47,413 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 09:30:47,417 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 09:30:47 BasicIcfg [2023-08-04 09:30:47,417 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 09:30:47,418 INFO L158 Benchmark]: Toolchain (without parser) took 219979.45ms. Allocated memory was 373.3MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 325.3MB in the beginning and 14.1GB in the end (delta: -13.7GB). Peak memory consumption was 1.9GB. Max. memory is 16.0GB. [2023-08-04 09:30:47,418 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 373.3MB. Free memory is still 326.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 09:30:47,418 INFO L158 Benchmark]: CACSL2BoogieTranslator took 240.27ms. Allocated memory is still 373.3MB. Free memory was 325.0MB in the beginning and 313.1MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-04 09:30:47,418 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.51ms. Allocated memory is still 373.3MB. Free memory was 313.1MB in the beginning and 311.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 09:30:47,418 INFO L158 Benchmark]: Boogie Preprocessor took 26.36ms. Allocated memory is still 373.3MB. Free memory was 311.3MB in the beginning and 309.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 09:30:47,418 INFO L158 Benchmark]: RCFGBuilder took 516.83ms. Allocated memory is still 373.3MB. Free memory was 309.2MB in the beginning and 288.3MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-04 09:30:47,419 INFO L158 Benchmark]: TraceAbstraction took 219153.42ms. Allocated memory was 373.3MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 287.6MB in the beginning and 14.1GB in the end (delta: -13.8GB). Peak memory consumption was 1.9GB. Max. memory is 16.0GB. [2023-08-04 09:30:47,420 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 373.3MB. Free memory is still 326.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 240.27ms. Allocated memory is still 373.3MB. Free memory was 325.0MB in the beginning and 313.1MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 34.51ms. Allocated memory is still 373.3MB. Free memory was 313.1MB in the beginning and 311.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 26.36ms. Allocated memory is still 373.3MB. Free memory was 311.3MB in the beginning and 309.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 516.83ms. Allocated memory is still 373.3MB. Free memory was 309.2MB in the beginning and 288.3MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 219153.42ms. Allocated memory was 373.3MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 287.6MB in the beginning and 14.1GB in the end (delta: -13.8GB). Peak memory consumption was 1.9GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.9s, 170 PlacesBefore, 42 PlacesAfterwards, 188 TransitionsBefore, 47 TransitionsAfterwards, 4058 CoEnabledTransitionPairs, 6 FixpointIterations, 63 TrivialSequentialCompositions, 61 ConcurrentSequentialCompositions, 10 TrivialYvCompositions, 17 ConcurrentYvCompositions, 13 ChoiceCompositions, 164 TotalNumberOfCompositions, 6670 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5842, independent: 5778, independent conditional: 0, independent unconditional: 5778, dependent: 64, dependent conditional: 0, dependent unconditional: 64, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2092, independent: 2073, independent conditional: 0, independent unconditional: 2073, dependent: 19, dependent conditional: 0, dependent unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5842, independent: 3705, independent conditional: 0, independent unconditional: 3705, dependent: 45, dependent conditional: 0, dependent unconditional: 45, unknown: 2092, unknown conditional: 0, unknown unconditional: 2092] , Statistics on independence cache: Total cache size (in pairs): 139, Positive cache size: 135, Positive conditional cache size: 0, Positive unconditional cache size: 135, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.4s, 170 PlacesBefore, 42 PlacesAfterwards, 188 TransitionsBefore, 47 TransitionsAfterwards, 4058 CoEnabledTransitionPairs, 7 FixpointIterations, 64 TrivialSequentialCompositions, 61 ConcurrentSequentialCompositions, 10 TrivialYvCompositions, 17 ConcurrentYvCompositions, 13 ChoiceCompositions, 165 TotalNumberOfCompositions, 7144 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6377, independent: 6304, independent conditional: 0, independent unconditional: 6304, dependent: 73, dependent conditional: 0, dependent unconditional: 73, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2112, independent: 2092, independent conditional: 0, independent unconditional: 2092, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6377, independent: 4212, independent conditional: 0, independent unconditional: 4212, dependent: 53, dependent conditional: 0, dependent unconditional: 53, unknown: 2112, unknown conditional: 0, unknown unconditional: 2112] , Statistics on independence cache: Total cache size (in pairs): 145, Positive cache size: 141, Positive conditional cache size: 0, Positive unconditional cache size: 141, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.1s, 198 PlacesBefore, 59 PlacesAfterwards, 223 TransitionsBefore, 69 TransitionsAfterwards, 10168 CoEnabledTransitionPairs, 7 FixpointIterations, 64 TrivialSequentialCompositions, 70 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 21 ConcurrentYvCompositions, 15 ChoiceCompositions, 181 TotalNumberOfCompositions, 22447 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 19570, independent: 19450, independent conditional: 0, independent unconditional: 19450, dependent: 120, dependent conditional: 0, dependent unconditional: 120, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5326, independent: 5298, independent conditional: 0, independent unconditional: 5298, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 19570, independent: 14152, independent conditional: 0, independent unconditional: 14152, dependent: 92, dependent conditional: 0, dependent unconditional: 92, unknown: 5326, unknown conditional: 0, unknown unconditional: 5326] , Statistics on independence cache: Total cache size (in pairs): 476, Positive cache size: 470, Positive conditional cache size: 0, Positive unconditional cache size: 470, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.9s, 198 PlacesBefore, 59 PlacesAfterwards, 223 TransitionsBefore, 69 TransitionsAfterwards, 10168 CoEnabledTransitionPairs, 7 FixpointIterations, 65 TrivialSequentialCompositions, 70 ConcurrentSequentialCompositions, 10 TrivialYvCompositions, 21 ConcurrentYvCompositions, 15 ChoiceCompositions, 181 TotalNumberOfCompositions, 22191 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 19568, independent: 19452, independent conditional: 0, independent unconditional: 19452, dependent: 116, dependent conditional: 0, dependent unconditional: 116, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5343, independent: 5318, independent conditional: 0, independent unconditional: 5318, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 19568, independent: 14134, independent conditional: 0, independent unconditional: 14134, dependent: 91, dependent conditional: 0, dependent unconditional: 91, unknown: 5343, unknown conditional: 0, unknown unconditional: 5343] , Statistics on independence cache: Total cache size (in pairs): 467, Positive cache size: 462, Positive conditional cache size: 0, Positive unconditional cache size: 462, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 98]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 186 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 9.2s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 144 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 80 mSDsluCounter, 12 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 549 IncrementalHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 12 mSDtfsCounter, 549 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 180 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=144occurred in iteration=5, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 260 NumberOfCodeBlocks, 260 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 280 ConstructedInterpolants, 0 QuantifiedInterpolants, 372 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1098 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 40/48 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 10 procedures, 208 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 182.2s, OverallIterations: 18, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 164.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.5s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 2471 SdHoareTripleChecker+Valid, 3.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2177 mSDsluCounter, 492 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 387 IncrementalHoareTripleChecker+Unchecked, 372 mSDsCounter, 117 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4905 IncrementalHoareTripleChecker+Invalid, 5415 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 117 mSolverCounterUnsat, 120 mSDtfsCounter, 4905 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1323 GetRequests, 1181 SyntacticMatches, 29 SemanticMatches, 113 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=372occurred in iteration=17, InterpolantAutomatonStates: 89, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 6.9s InterpolantComputationTime, 1475 NumberOfCodeBlocks, 1475 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1995 ConstructedInterpolants, 22 QuantifiedInterpolants, 6761 SizeOfPredicates, 28 NumberOfNonLiveVariables, 3741 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 43 InterpolantComputations, 10 PerfectInterpolantSequences, 792/859 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 186 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.9s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 41 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 107 IncrementalHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 1 mSDtfsCounter, 107 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=136occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 12 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 10 procedures, 208 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 22.7s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 15.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 273 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 212 mSDsluCounter, 9 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 23 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 686 IncrementalHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 23 mSolverCounterUnsat, 9 mSDtfsCounter, 686 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 171 GetRequests, 147 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=228occurred in iteration=0, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 247 NumberOfCodeBlocks, 247 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 276 ConstructedInterpolants, 0 QuantifiedInterpolants, 448 SizeOfPredicates, 0 NumberOfNonLiveVariables, 923 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 157/178 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 09:30:47,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...