/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-three-array-sum.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:49:19,813 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:49:19,859 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:49:19,862 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:49:19,863 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:49:19,863 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:49:19,863 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:49:19,885 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:49:19,886 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:49:19,886 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:49:19,887 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:49:19,887 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:49:19,887 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:49:19,888 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:49:19,888 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:49:19,888 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:49:19,889 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:49:19,889 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:49:19,889 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:49:19,890 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:49:19,890 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:49:19,893 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:49:19,893 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:49:19,893 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:49:19,894 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:49:19,894 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:49:19,894 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:49:19,894 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:49:19,895 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:49:19,895 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:49:19,895 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:49:19,895 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:49:19,896 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:49:19,896 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:49:19,896 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:49:19,896 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:49:19,897 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:49:19,897 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:49:19,897 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:49:19,897 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:49:19,898 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:49:19,901 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:49:20,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:49:20,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:49:20,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:49:20,147 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:49:20,147 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:49:20,148 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-three-array-sum.wvr_bound2.c [2023-08-04 09:49:21,328 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:49:21,534 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:49:21,534 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-three-array-sum.wvr_bound2.c [2023-08-04 09:49:21,543 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e658938d/b31fc48c0a754ce78b64b72bd8e222e1/FLAG6287b9978 [2023-08-04 09:49:21,560 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e658938d/b31fc48c0a754ce78b64b72bd8e222e1 [2023-08-04 09:49:21,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:49:21,568 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:49:21,572 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:49:21,572 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:49:21,575 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:49:21,576 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:49:21" (1/1) ... [2023-08-04 09:49:21,577 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f4653bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:21, skipping insertion in model container [2023-08-04 09:49:21,577 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:49:21" (1/1) ... [2023-08-04 09:49:21,603 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:49:21,778 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-three-array-sum.wvr_bound2.c[2934,2947] [2023-08-04 09:49:21,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:49:21,799 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:49:21,835 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-three-array-sum.wvr_bound2.c[2934,2947] [2023-08-04 09:49:21,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:49:21,848 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:49:21,849 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:49:21,855 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:49:21,856 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:21 WrapperNode [2023-08-04 09:49:21,857 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:49:21,858 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:49:21,858 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:49:21,858 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:49:21,864 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:21" (1/1) ... [2023-08-04 09:49:21,883 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:21" (1/1) ... [2023-08-04 09:49:21,912 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 8, calls inlined = 12, statements flattened = 202 [2023-08-04 09:49:21,913 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:49:21,913 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:49:21,913 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:49:21,913 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:49:21,921 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:21" (1/1) ... [2023-08-04 09:49:21,921 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:21" (1/1) ... [2023-08-04 09:49:21,935 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:21" (1/1) ... [2023-08-04 09:49:21,936 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:21" (1/1) ... [2023-08-04 09:49:21,953 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:21" (1/1) ... [2023-08-04 09:49:21,957 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:21" (1/1) ... [2023-08-04 09:49:21,959 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:21" (1/1) ... [2023-08-04 09:49:21,960 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:21" (1/1) ... [2023-08-04 09:49:21,969 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:49:21,970 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:49:21,970 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:49:21,970 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:49:21,970 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:21" (1/1) ... [2023-08-04 09:49:21,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:49:21,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:22,010 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 09:49:22,017 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 09:49:22,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:49:22,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:49:22,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:49:22,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:49:22,045 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:49:22,046 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:49:22,046 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:49:22,046 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:49:22,046 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:49:22,048 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:49:22,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:49:22,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:49:22,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:49:22,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:49:22,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:49:22,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:49:22,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:49:22,051 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 09:49:22,146 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:49:22,148 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:49:22,577 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:49:22,624 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:49:22,624 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 09:49:22,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:49:22 BoogieIcfgContainer [2023-08-04 09:49:22,627 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:49:22,629 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:49:22,630 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:49:22,633 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:49:22,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:49:21" (1/3) ... [2023-08-04 09:49:22,635 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fcbcc8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:49:22, skipping insertion in model container [2023-08-04 09:49:22,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:49:21" (2/3) ... [2023-08-04 09:49:22,636 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fcbcc8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:49:22, skipping insertion in model container [2023-08-04 09:49:22,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:49:22" (3/3) ... [2023-08-04 09:49:22,637 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-three-array-sum.wvr_bound2.c [2023-08-04 09:49:22,646 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:49:22,654 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:49:22,654 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:49:22,654 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:49:22,728 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:49:22,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 260 transitions, 562 flow [2023-08-04 09:49:22,999 INFO L124 PetriNetUnfolderBase]: 112/737 cut-off events. [2023-08-04 09:49:22,999 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:49:23,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 737 events. 112/737 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3408 event pairs, 0 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 450. Up to 16 conditions per place. [2023-08-04 09:49:23,012 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 260 transitions, 562 flow [2023-08-04 09:49:23,025 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 260 transitions, 562 flow [2023-08-04 09:49:23,028 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:49:23,044 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 232 places, 260 transitions, 562 flow [2023-08-04 09:49:23,047 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 232 places, 260 transitions, 562 flow [2023-08-04 09:49:23,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 260 transitions, 562 flow [2023-08-04 09:49:23,172 INFO L124 PetriNetUnfolderBase]: 112/737 cut-off events. [2023-08-04 09:49:23,173 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:49:23,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 737 events. 112/737 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3408 event pairs, 0 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 450. Up to 16 conditions per place. [2023-08-04 09:49:23,188 INFO L119 LiptonReduction]: Number of co-enabled transitions 6858 [2023-08-04 09:49:29,795 INFO L134 LiptonReduction]: Checked pairs total: 14005 [2023-08-04 09:49:29,795 INFO L136 LiptonReduction]: Total number of compositions: 240 [2023-08-04 09:49:29,816 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:49:29,822 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;@46f5839e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:49:29,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:49:29,828 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:49:29,828 INFO L124 PetriNetUnfolderBase]: 5/40 cut-off events. [2023-08-04 09:49:29,828 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:49:29,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:29,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:49:29,830 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:29,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:29,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1459354528, now seen corresponding path program 1 times [2023-08-04 09:49:29,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:29,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50452252] [2023-08-04 09:49:29,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:29,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:30,135 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 09:49:30,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:30,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50452252] [2023-08-04 09:49:30,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50452252] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:49:30,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:49:30,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:49:30,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802625406] [2023-08-04 09:49:30,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:49:30,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:49:30,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:30,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:49:30,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:49:30,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 500 [2023-08-04 09:49:30,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 58 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 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 09:49:30,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:30,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 500 [2023-08-04 09:49:30,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:49:30,749 INFO L124 PetriNetUnfolderBase]: 4550/6178 cut-off events. [2023-08-04 09:49:30,750 INFO L125 PetriNetUnfolderBase]: For 271/271 co-relation queries the response was YES. [2023-08-04 09:49:30,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12434 conditions, 6178 events. 4550/6178 cut-off events. For 271/271 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 29975 event pairs, 2233 based on Foata normal form. 0/3584 useless extension candidates. Maximal degree in co-relation 10766. Up to 5902 conditions per place. [2023-08-04 09:49:30,797 INFO L140 encePairwiseOnDemand]: 496/500 looper letters, 49 selfloop transitions, 2 changer transitions 4/62 dead transitions. [2023-08-04 09:49:30,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 270 flow [2023-08-04 09:49:30,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:49:30,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:49:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 720 transitions. [2023-08-04 09:49:30,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2023-08-04 09:49:30,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 720 transitions. [2023-08-04 09:49:30,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 720 transitions. [2023-08-04 09:49:30,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:49:30,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 720 transitions. [2023-08-04 09:49:30,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 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 09:49:30,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:49:30,840 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:49:30,842 INFO L175 Difference]: Start difference. First operand has 49 places, 58 transitions, 158 flow. Second operand 3 states and 720 transitions. [2023-08-04 09:49:30,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 270 flow [2023-08-04 09:49:30,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 62 transitions, 270 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:49:30,850 INFO L231 Difference]: Finished difference. Result has 51 places, 54 transitions, 152 flow [2023-08-04 09:49:30,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=51, PETRI_TRANSITIONS=54} [2023-08-04 09:49:30,855 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-08-04 09:49:30,855 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 54 transitions, 152 flow [2023-08-04 09:49:30,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 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 09:49:30,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:30,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:49:30,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:49:30,857 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:30,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:30,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1546295993, now seen corresponding path program 1 times [2023-08-04 09:49:30,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:30,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007840845] [2023-08-04 09:49:30,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:30,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:31,026 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 09:49:31,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:31,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007840845] [2023-08-04 09:49:31,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007840845] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:31,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127543934] [2023-08-04 09:49:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:31,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:31,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:31,033 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 09:49:31,061 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 09:49:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:31,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:49:31,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:31,153 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 09:49:31,154 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:49:31,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127543934] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:49:31,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:49:31,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:49:31,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149983864] [2023-08-04 09:49:31,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:49:31,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:49:31,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:31,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:49:31,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:49:31,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 500 [2023-08-04 09:49:31,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 54 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 226.33333333333334) internal successors, (679), 3 states have internal predecessors, (679), 0 states have call successors, (0), 0 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 09:49:31,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:31,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 500 [2023-08-04 09:49:31,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:49:31,601 INFO L124 PetriNetUnfolderBase]: 4320/5806 cut-off events. [2023-08-04 09:49:31,602 INFO L125 PetriNetUnfolderBase]: For 259/259 co-relation queries the response was YES. [2023-08-04 09:49:31,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11695 conditions, 5806 events. 4320/5806 cut-off events. For 259/259 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 27117 event pairs, 1818 based on Foata normal form. 0/3356 useless extension candidates. Maximal degree in co-relation 10026. Up to 5556 conditions per place. [2023-08-04 09:49:31,634 INFO L140 encePairwiseOnDemand]: 497/500 looper letters, 51 selfloop transitions, 2 changer transitions 1/61 dead transitions. [2023-08-04 09:49:31,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 274 flow [2023-08-04 09:49:31,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:49:31,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:49:31,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 721 transitions. [2023-08-04 09:49:31,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806666666666667 [2023-08-04 09:49:31,638 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 721 transitions. [2023-08-04 09:49:31,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 721 transitions. [2023-08-04 09:49:31,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:49:31,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 721 transitions. [2023-08-04 09:49:31,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 0 states have call successors, (0), 0 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 09:49:31,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:49:31,644 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:49:31,644 INFO L175 Difference]: Start difference. First operand has 51 places, 54 transitions, 152 flow. Second operand 3 states and 721 transitions. [2023-08-04 09:49:31,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 274 flow [2023-08-04 09:49:31,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 258 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:49:31,647 INFO L231 Difference]: Finished difference. Result has 46 places, 54 transitions, 144 flow [2023-08-04 09:49:31,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=46, PETRI_TRANSITIONS=54} [2023-08-04 09:49:31,648 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2023-08-04 09:49:31,648 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 54 transitions, 144 flow [2023-08-04 09:49:31,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.33333333333334) internal successors, (679), 3 states have internal predecessors, (679), 0 states have call successors, (0), 0 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 09:49:31,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:31,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:49:31,657 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 09:49:31,855 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 09:49:31,855 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:31,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:31,856 INFO L85 PathProgramCache]: Analyzing trace with hash -3102490, now seen corresponding path program 1 times [2023-08-04 09:49:31,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:31,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795104508] [2023-08-04 09:49:31,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:31,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:31,956 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 09:49:31,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:31,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795104508] [2023-08-04 09:49:31,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795104508] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:31,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503758645] [2023-08-04 09:49:31,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:31,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:31,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:31,963 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 09:49:31,982 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 09:49:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:32,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:49:32,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:32,061 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 09:49:32,061 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:49:32,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503758645] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:49:32,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:49:32,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:49:32,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700942403] [2023-08-04 09:49:32,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:49:32,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:49:32,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:32,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:49:32,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:49:32,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 500 [2023-08-04 09:49:32,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 54 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 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 09:49:32,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:32,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 500 [2023-08-04 09:49:32,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:49:32,522 INFO L124 PetriNetUnfolderBase]: 4309/5795 cut-off events. [2023-08-04 09:49:32,523 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 09:49:32,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11691 conditions, 5795 events. 4309/5795 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27327 event pairs, 1599 based on Foata normal form. 0/3373 useless extension candidates. Maximal degree in co-relation 4241. Up to 5300 conditions per place. [2023-08-04 09:49:32,554 INFO L140 encePairwiseOnDemand]: 497/500 looper letters, 55 selfloop transitions, 2 changer transitions 1/65 dead transitions. [2023-08-04 09:49:32,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 282 flow [2023-08-04 09:49:32,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:49:32,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:49:32,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 725 transitions. [2023-08-04 09:49:32,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2023-08-04 09:49:32,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 725 transitions. [2023-08-04 09:49:32,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 725 transitions. [2023-08-04 09:49:32,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:49:32,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 725 transitions. [2023-08-04 09:49:32,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 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 09:49:32,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:49:32,562 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:49:32,562 INFO L175 Difference]: Start difference. First operand has 46 places, 54 transitions, 144 flow. Second operand 3 states and 725 transitions. [2023-08-04 09:49:32,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 282 flow [2023-08-04 09:49:32,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 65 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:49:32,565 INFO L231 Difference]: Finished difference. Result has 47 places, 54 transitions, 148 flow [2023-08-04 09:49:32,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=47, PETRI_TRANSITIONS=54} [2023-08-04 09:49:32,566 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-08-04 09:49:32,566 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 54 transitions, 148 flow [2023-08-04 09:49:32,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 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 09:49:32,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:32,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:49:32,575 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 09:49:32,772 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 09:49:32,773 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:32,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:32,773 INFO L85 PathProgramCache]: Analyzing trace with hash -2081007831, now seen corresponding path program 1 times [2023-08-04 09:49:32,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:32,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791500162] [2023-08-04 09:49:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:32,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:32,853 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 09:49:32,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:32,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791500162] [2023-08-04 09:49:32,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791500162] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:32,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423471014] [2023-08-04 09:49:32,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:32,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:32,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:32,855 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 09:49:32,858 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 09:49:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:32,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:49:32,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:32,958 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 09:49:32,958 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:49:32,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423471014] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:49:32,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:49:32,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:49:32,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365903934] [2023-08-04 09:49:32,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:49:32,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:49:32,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:32,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:49:32,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:49:32,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 500 [2023-08-04 09:49:32,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 54 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 0 states have call successors, (0), 0 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 09:49:32,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:32,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 500 [2023-08-04 09:49:32,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:49:33,253 INFO L124 PetriNetUnfolderBase]: 2662/3660 cut-off events. [2023-08-04 09:49:33,253 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-08-04 09:49:33,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7571 conditions, 3660 events. 2662/3660 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16096 event pairs, 1005 based on Foata normal form. 0/2211 useless extension candidates. Maximal degree in co-relation 2622. Up to 2739 conditions per place. [2023-08-04 09:49:33,270 INFO L140 encePairwiseOnDemand]: 497/500 looper letters, 60 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-08-04 09:49:33,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 69 transitions, 308 flow [2023-08-04 09:49:33,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:49:33,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:49:33,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 729 transitions. [2023-08-04 09:49:33,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.486 [2023-08-04 09:49:33,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 729 transitions. [2023-08-04 09:49:33,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 729 transitions. [2023-08-04 09:49:33,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:49:33,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 729 transitions. [2023-08-04 09:49:33,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 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 09:49:33,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:49:33,278 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:49:33,278 INFO L175 Difference]: Start difference. First operand has 47 places, 54 transitions, 148 flow. Second operand 3 states and 729 transitions. [2023-08-04 09:49:33,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 69 transitions, 308 flow [2023-08-04 09:49:33,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 69 transitions, 304 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:49:33,281 INFO L231 Difference]: Finished difference. Result has 48 places, 55 transitions, 156 flow [2023-08-04 09:49:33,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=48, PETRI_TRANSITIONS=55} [2023-08-04 09:49:33,282 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2023-08-04 09:49:33,282 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 55 transitions, 156 flow [2023-08-04 09:49:33,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 0 states have call successors, (0), 0 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 09:49:33,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:33,283 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 09:49:33,291 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 09:49:33,489 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 09:49:33,489 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:33,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:33,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1047907832, now seen corresponding path program 1 times [2023-08-04 09:49:33,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:33,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77544738] [2023-08-04 09:49:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:33,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:33,553 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 09:49:33,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:33,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77544738] [2023-08-04 09:49:33,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77544738] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:33,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879865558] [2023-08-04 09:49:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:33,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:33,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:33,555 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 09:49:33,557 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 09:49:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:33,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:49:33,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:33,656 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 09:49:33,656 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:49:33,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879865558] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:49:33,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:49:33,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:49:33,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749567751] [2023-08-04 09:49:33,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:49:33,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:49:33,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:33,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:49:33,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:49:33,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 500 [2023-08-04 09:49:33,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 55 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 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 09:49:33,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:33,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 500 [2023-08-04 09:49:33,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:49:33,962 INFO L124 PetriNetUnfolderBase]: 2243/3104 cut-off events. [2023-08-04 09:49:33,962 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2023-08-04 09:49:33,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6617 conditions, 3104 events. 2243/3104 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13241 event pairs, 986 based on Foata normal form. 0/1993 useless extension candidates. Maximal degree in co-relation 2328. Up to 2543 conditions per place. [2023-08-04 09:49:33,973 INFO L140 encePairwiseOnDemand]: 497/500 looper letters, 61 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-04 09:49:33,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 70 transitions, 318 flow [2023-08-04 09:49:33,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:49:33,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:49:33,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 729 transitions. [2023-08-04 09:49:33,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.486 [2023-08-04 09:49:33,976 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 729 transitions. [2023-08-04 09:49:33,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 729 transitions. [2023-08-04 09:49:33,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:49:33,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 729 transitions. [2023-08-04 09:49:33,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 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 09:49:33,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:49:33,981 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:49:33,981 INFO L175 Difference]: Start difference. First operand has 48 places, 55 transitions, 156 flow. Second operand 3 states and 729 transitions. [2023-08-04 09:49:33,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 70 transitions, 318 flow [2023-08-04 09:49:33,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:49:33,986 INFO L231 Difference]: Finished difference. Result has 50 places, 56 transitions, 166 flow [2023-08-04 09:49:33,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=50, PETRI_TRANSITIONS=56} [2023-08-04 09:49:33,986 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-08-04 09:49:33,987 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 56 transitions, 166 flow [2023-08-04 09:49:33,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 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 09:49:33,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:33,987 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 09:49:33,996 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 09:49:34,193 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 09:49:34,194 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:34,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:34,194 INFO L85 PathProgramCache]: Analyzing trace with hash 65160224, now seen corresponding path program 1 times [2023-08-04 09:49:34,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:34,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469447824] [2023-08-04 09:49:34,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:34,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:34,249 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 09:49:34,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:34,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469447824] [2023-08-04 09:49:34,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469447824] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:34,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634015164] [2023-08-04 09:49:34,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:34,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:34,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:34,251 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 09:49:34,253 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 09:49:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:34,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:49:34,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:34,361 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 09:49:34,361 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:49:34,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634015164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:49:34,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:49:34,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:49:34,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138682959] [2023-08-04 09:49:34,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:49:34,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:49:34,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:34,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:49:34,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:49:34,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 500 [2023-08-04 09:49:34,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 56 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 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 09:49:34,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:34,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 500 [2023-08-04 09:49:34,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:49:34,618 INFO L124 PetriNetUnfolderBase]: 2225/3076 cut-off events. [2023-08-04 09:49:34,618 INFO L125 PetriNetUnfolderBase]: For 204/204 co-relation queries the response was YES. [2023-08-04 09:49:34,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6615 conditions, 3076 events. 2225/3076 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13041 event pairs, 1127 based on Foata normal form. 0/1998 useless extension candidates. Maximal degree in co-relation 5204. Up to 2918 conditions per place. [2023-08-04 09:49:34,629 INFO L140 encePairwiseOnDemand]: 497/500 looper letters, 55 selfloop transitions, 2 changer transitions 3/67 dead transitions. [2023-08-04 09:49:34,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 308 flow [2023-08-04 09:49:34,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:49:34,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:49:34,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 725 transitions. [2023-08-04 09:49:34,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2023-08-04 09:49:34,632 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 725 transitions. [2023-08-04 09:49:34,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 725 transitions. [2023-08-04 09:49:34,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:49:34,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 725 transitions. [2023-08-04 09:49:34,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 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 09:49:34,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:49:34,637 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:49:34,637 INFO L175 Difference]: Start difference. First operand has 50 places, 56 transitions, 166 flow. Second operand 3 states and 725 transitions. [2023-08-04 09:49:34,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 308 flow [2023-08-04 09:49:34,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:49:34,643 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 164 flow [2023-08-04 09:49:34,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2023-08-04 09:49:34,644 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-04 09:49:34,644 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 164 flow [2023-08-04 09:49:34,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 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 09:49:34,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:34,645 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 09:49:34,650 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 09:49:34,850 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 09:49:34,850 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:34,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:34,851 INFO L85 PathProgramCache]: Analyzing trace with hash 844251550, now seen corresponding path program 1 times [2023-08-04 09:49:34,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:34,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346690397] [2023-08-04 09:49:34,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:34,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:34,921 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 09:49:34,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:34,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346690397] [2023-08-04 09:49:34,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346690397] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:34,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143767195] [2023-08-04 09:49:34,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:34,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:34,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:34,926 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 09:49:34,953 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 09:49:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:35,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:49:35,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:35,080 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 09:49:35,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:49:35,097 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 09:49:35,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143767195] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:49:35,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:49:35,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:49:35,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395518480] [2023-08-04 09:49:35,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:49:35,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:49:35,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:35,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:49:35,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:49:35,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 500 [2023-08-04 09:49:35,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 228.2) internal successors, (1141), 5 states have internal predecessors, (1141), 0 states have call successors, (0), 0 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 09:49:35,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:35,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 500 [2023-08-04 09:49:35,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:49:35,149 INFO L124 PetriNetUnfolderBase]: 15/38 cut-off events. [2023-08-04 09:49:35,149 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 09:49:35,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 38 events. 15/38 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 54 event pairs, 4 based on Foata normal form. 5/36 useless extension candidates. Maximal degree in co-relation 77. Up to 21 conditions per place. [2023-08-04 09:49:35,149 INFO L140 encePairwiseOnDemand]: 497/500 looper letters, 0 selfloop transitions, 0 changer transitions 21/21 dead transitions. [2023-08-04 09:49:35,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 84 flow [2023-08-04 09:49:35,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:49:35,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:49:35,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 904 transitions. [2023-08-04 09:49:35,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452 [2023-08-04 09:49:35,152 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 904 transitions. [2023-08-04 09:49:35,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 904 transitions. [2023-08-04 09:49:35,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:49:35,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 904 transitions. [2023-08-04 09:49:35,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 226.0) internal successors, (904), 4 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 09:49:35,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 500.0) internal successors, (2500), 5 states have internal predecessors, (2500), 0 states have call successors, (0), 0 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 09:49:35,158 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 500.0) internal successors, (2500), 5 states have internal predecessors, (2500), 0 states have call successors, (0), 0 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 09:49:35,159 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 164 flow. Second operand 4 states and 904 transitions. [2023-08-04 09:49:35,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 84 flow [2023-08-04 09:49:35,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 21 transitions, 82 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:49:35,159 INFO L231 Difference]: Finished difference. Result has 25 places, 0 transitions, 0 flow [2023-08-04 09:49:35,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=25, PETRI_TRANSITIONS=0} [2023-08-04 09:49:35,160 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -24 predicate places. [2023-08-04 09:49:35,160 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 0 transitions, 0 flow [2023-08-04 09:49:35,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 228.2) internal successors, (1141), 5 states have internal predecessors, (1141), 0 states have call successors, (0), 0 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 09:49:35,163 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:49:35,176 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 09:49:35,376 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 09:49:35,377 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:49:35,379 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:49:35,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 260 transitions, 562 flow [2023-08-04 09:49:35,460 INFO L124 PetriNetUnfolderBase]: 112/737 cut-off events. [2023-08-04 09:49:35,460 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:49:35,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 737 events. 112/737 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3408 event pairs, 0 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 450. Up to 16 conditions per place. [2023-08-04 09:49:35,462 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 260 transitions, 562 flow [2023-08-04 09:49:35,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 260 transitions, 562 flow [2023-08-04 09:49:35,464 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:49:35,464 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 232 places, 260 transitions, 562 flow [2023-08-04 09:49:35,464 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 232 places, 260 transitions, 562 flow [2023-08-04 09:49:35,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 260 transitions, 562 flow [2023-08-04 09:49:35,526 INFO L124 PetriNetUnfolderBase]: 112/737 cut-off events. [2023-08-04 09:49:35,527 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:49:35,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 737 events. 112/737 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3408 event pairs, 0 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 450. Up to 16 conditions per place. [2023-08-04 09:49:35,539 INFO L119 LiptonReduction]: Number of co-enabled transitions 6858 [2023-08-04 09:49:41,332 INFO L134 LiptonReduction]: Checked pairs total: 14005 [2023-08-04 09:49:41,333 INFO L136 LiptonReduction]: Total number of compositions: 241 [2023-08-04 09:49:41,334 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:49:41,334 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;@46f5839e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:49:41,335 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:49:41,338 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:49:41,338 INFO L124 PetriNetUnfolderBase]: 5/38 cut-off events. [2023-08-04 09:49:41,338 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:49:41,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:41,338 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:49:41,338 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 09:49:41,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:41,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1556907414, now seen corresponding path program 1 times [2023-08-04 09:49:41,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:41,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756888898] [2023-08-04 09:49:41,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:41,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:49:41,368 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:49:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:49:41,399 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:49:41,399 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:49:41,400 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:49:41,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:49:41,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:49:41,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:49:41,400 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:49:41,401 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:49:41,401 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:49:41,401 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:49:41,424 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:49:41,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 310 transitions, 710 flow [2023-08-04 09:49:41,918 INFO L124 PetriNetUnfolderBase]: 916/4273 cut-off events. [2023-08-04 09:49:41,918 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:49:41,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4947 conditions, 4273 events. 916/4273 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 33845 event pairs, 11 based on Foata normal form. 0/3601 useless extension candidates. Maximal degree in co-relation 2572. Up to 192 conditions per place. [2023-08-04 09:49:41,956 INFO L82 GeneralOperation]: Start removeDead. Operand has 272 places, 310 transitions, 710 flow [2023-08-04 09:49:41,979 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 272 places, 310 transitions, 710 flow [2023-08-04 09:49:41,979 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:49:41,979 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 272 places, 310 transitions, 710 flow [2023-08-04 09:49:41,979 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 272 places, 310 transitions, 710 flow [2023-08-04 09:49:41,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 310 transitions, 710 flow [2023-08-04 09:49:42,484 INFO L124 PetriNetUnfolderBase]: 916/4273 cut-off events. [2023-08-04 09:49:42,484 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:49:42,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4947 conditions, 4273 events. 916/4273 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 33845 event pairs, 11 based on Foata normal form. 0/3601 useless extension candidates. Maximal degree in co-relation 2572. Up to 192 conditions per place. [2023-08-04 09:49:42,588 INFO L119 LiptonReduction]: Number of co-enabled transitions 18208 [2023-08-04 09:49:48,563 INFO L134 LiptonReduction]: Checked pairs total: 48044 [2023-08-04 09:49:48,564 INFO L136 LiptonReduction]: Total number of compositions: 271 [2023-08-04 09:49:48,565 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:49:48,565 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;@46f5839e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:49:48,565 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:49:48,568 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:49:48,568 INFO L124 PetriNetUnfolderBase]: 5/37 cut-off events. [2023-08-04 09:49:48,568 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:49:48,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:48,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:49:48,568 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:48,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:48,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1176716133, now seen corresponding path program 1 times [2023-08-04 09:49:48,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:48,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057788845] [2023-08-04 09:49:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:48,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:48,599 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 09:49:48,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:48,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057788845] [2023-08-04 09:49:48,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057788845] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:49:48,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:49:48,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:49:48,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877805767] [2023-08-04 09:49:48,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:49:48,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:49:48,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:48,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:49:48,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:49:48,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 581 [2023-08-04 09:49:48,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 87 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 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 09:49:48,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:48,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 581 [2023-08-04 09:49:48,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:51:07,598 INFO L124 PetriNetUnfolderBase]: 1102897/1292530 cut-off events. [2023-08-04 09:51:07,598 INFO L125 PetriNetUnfolderBase]: For 107623/107623 co-relation queries the response was YES. [2023-08-04 09:51:10,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2613952 conditions, 1292530 events. 1102897/1292530 cut-off events. For 107623/107623 co-relation queries the response was YES. Maximal size of possible extension queue 22483. Compared 6345290 event pairs, 467273 based on Foata normal form. 0/731499 useless extension candidates. Maximal degree in co-relation 807095. Up to 1260453 conditions per place. [2023-08-04 09:51:17,564 INFO L140 encePairwiseOnDemand]: 577/581 looper letters, 73 selfloop transitions, 2 changer transitions 3/92 dead transitions. [2023-08-04 09:51:17,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 92 transitions, 424 flow [2023-08-04 09:51:17,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:51:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:51:17,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 842 transitions. [2023-08-04 09:51:17,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48307515777395293 [2023-08-04 09:51:17,574 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 842 transitions. [2023-08-04 09:51:17,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 842 transitions. [2023-08-04 09:51:17,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:51:17,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 842 transitions. [2023-08-04 09:51:17,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 280.6666666666667) internal successors, (842), 3 states have internal predecessors, (842), 0 states have call successors, (0), 0 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 09:51:17,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 581.0) internal successors, (2324), 4 states have internal predecessors, (2324), 0 states have call successors, (0), 0 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 09:51:17,597 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 581.0) internal successors, (2324), 4 states have internal predecessors, (2324), 0 states have call successors, (0), 0 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 09:51:17,597 INFO L175 Difference]: Start difference. First operand has 71 places, 87 transitions, 264 flow. Second operand 3 states and 842 transitions. [2023-08-04 09:51:17,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 92 transitions, 424 flow [2023-08-04 09:51:17,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 92 transitions, 424 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:51:17,692 INFO L231 Difference]: Finished difference. Result has 73 places, 84 transitions, 256 flow [2023-08-04 09:51:17,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=73, PETRI_TRANSITIONS=84} [2023-08-04 09:51:17,695 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2023-08-04 09:51:17,695 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 84 transitions, 256 flow [2023-08-04 09:51:17,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 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 09:51:17,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:51:17,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:51:17,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:51:17,696 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:51:17,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:51:17,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1557933445, now seen corresponding path program 1 times [2023-08-04 09:51:17,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:51:17,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618787467] [2023-08-04 09:51:17,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:51:17,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:51:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:51:17,832 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 09:51:17,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:51:17,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618787467] [2023-08-04 09:51:17,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618787467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:51:17,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723286170] [2023-08-04 09:51:17,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:51:17,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:51:17,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:51:17,861 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 09:51:17,908 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 09:51:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:51:17,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:51:17,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:51:17,991 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 09:51:17,992 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:51:17,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723286170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:51:17,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:51:17,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:51:17,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127913538] [2023-08-04 09:51:17,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:51:17,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:51:17,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:51:18,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:51:18,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:51:18,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 581 [2023-08-04 09:51:18,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 84 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 259.3333333333333) internal successors, (778), 3 states have internal predecessors, (778), 0 states have call successors, (0), 0 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 09:51:18,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:51:18,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 581 [2023-08-04 09:51:18,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand