/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-simple-array-sum.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:40:57,958 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:40:58,026 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:40:58,031 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:40:58,032 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:40:58,032 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:40:58,033 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:40:58,063 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:40:58,064 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:40:58,064 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:40:58,065 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:40:58,065 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:40:58,068 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:40:58,071 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:40:58,071 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:40:58,072 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:40:58,073 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:40:58,073 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:40:58,074 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:40:58,074 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:40:58,074 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:40:58,074 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:40:58,075 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:40:58,075 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:40:58,075 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:40:58,075 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:40:58,075 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:40:58,076 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:40:58,076 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:40:58,076 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:40:58,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:40:58,077 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:40:58,078 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:40:58,078 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:40:58,078 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:40:58,078 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:40:58,078 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:40:58,078 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:40:58,078 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:40:58,079 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:40:58,079 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:40:58,079 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:40:58,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:40:58,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:40:58,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:40:58,368 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:40:58,368 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:40:58,369 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-simple-array-sum.wvr_bound2.c [2023-08-04 09:40:59,583 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:40:59,772 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:40:59,772 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-simple-array-sum.wvr_bound2.c [2023-08-04 09:40:59,779 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/386f7a67f/6a9a945c7a424b0abacacfe39337da55/FLAG48a2f2c6f [2023-08-04 09:40:59,792 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/386f7a67f/6a9a945c7a424b0abacacfe39337da55 [2023-08-04 09:40:59,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:40:59,795 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:40:59,796 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:40:59,796 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:40:59,802 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:40:59,803 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:40:59" (1/1) ... [2023-08-04 09:40:59,804 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@771fa6a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:40:59, skipping insertion in model container [2023-08-04 09:40:59,804 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:40:59" (1/1) ... [2023-08-04 09:40:59,831 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:40:59,993 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-simple-array-sum.wvr_bound2.c[2933,2946] [2023-08-04 09:41:00,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:41:00,009 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:41:00,031 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-simple-array-sum.wvr_bound2.c[2933,2946] [2023-08-04 09:41:00,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:41:00,041 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:41:00,041 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:41:00,047 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:41:00,047 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:41:00 WrapperNode [2023-08-04 09:41:00,048 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:41:00,049 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:41:00,049 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:41:00,049 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:41:00,055 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:41:00" (1/1) ... [2023-08-04 09:41:00,068 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:41:00" (1/1) ... [2023-08-04 09:41:00,089 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 172 [2023-08-04 09:41:00,089 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:41:00,090 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:41:00,090 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:41:00,090 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:41:00,096 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:41:00" (1/1) ... [2023-08-04 09:41:00,096 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:41:00" (1/1) ... [2023-08-04 09:41:00,099 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:41:00" (1/1) ... [2023-08-04 09:41:00,100 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:41:00" (1/1) ... [2023-08-04 09:41:00,106 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:41:00" (1/1) ... [2023-08-04 09:41:00,111 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:41:00" (1/1) ... [2023-08-04 09:41:00,113 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:41:00" (1/1) ... [2023-08-04 09:41:00,114 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:41:00" (1/1) ... [2023-08-04 09:41:00,117 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:41:00,117 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:41:00,118 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:41:00,118 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:41:00,119 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:41:00" (1/1) ... [2023-08-04 09:41:00,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:41:00,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:41:00,171 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 09:41:00,195 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 09:41:00,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:41:00,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:41:00,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:41:00,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:41:00,211 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:41:00,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:41:00,211 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:41:00,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:41:00,211 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:41:00,213 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:41:00,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:41:00,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:41:00,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:41:00,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:41:00,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:41:00,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:41:00,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:41:00,216 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 09:41:00,353 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:41:00,355 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:41:00,665 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:41:00,694 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:41:00,694 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-04 09:41:00,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:41:00 BoogieIcfgContainer [2023-08-04 09:41:00,697 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:41:00,699 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:41:00,699 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:41:00,702 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:41:00,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:40:59" (1/3) ... [2023-08-04 09:41:00,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c1100cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:41:00, skipping insertion in model container [2023-08-04 09:41:00,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:41:00" (2/3) ... [2023-08-04 09:41:00,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c1100cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:41:00, skipping insertion in model container [2023-08-04 09:41:00,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:41:00" (3/3) ... [2023-08-04 09:41:00,704 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-simple-array-sum.wvr_bound2.c [2023-08-04 09:41:00,710 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:41:00,717 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:41:00,717 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:41:00,717 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:41:00,793 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:41:00,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 222 transitions, 486 flow [2023-08-04 09:41:01,000 INFO L124 PetriNetUnfolderBase]: 108/700 cut-off events. [2023-08-04 09:41:01,000 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:41:01,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 700 events. 108/700 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3391 event pairs, 0 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 403. Up to 16 conditions per place. [2023-08-04 09:41:01,010 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 222 transitions, 486 flow [2023-08-04 09:41:01,017 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 222 transitions, 486 flow [2023-08-04 09:41:01,020 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:41:01,027 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 222 transitions, 486 flow [2023-08-04 09:41:01,030 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 222 transitions, 486 flow [2023-08-04 09:41:01,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 222 transitions, 486 flow [2023-08-04 09:41:01,107 INFO L124 PetriNetUnfolderBase]: 108/700 cut-off events. [2023-08-04 09:41:01,107 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:41:01,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 700 events. 108/700 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3391 event pairs, 0 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 403. Up to 16 conditions per place. [2023-08-04 09:41:01,123 INFO L119 LiptonReduction]: Number of co-enabled transitions 6378 [2023-08-04 09:41:06,309 INFO L134 LiptonReduction]: Checked pairs total: 12584 [2023-08-04 09:41:06,309 INFO L136 LiptonReduction]: Total number of compositions: 195 [2023-08-04 09:41:06,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:41:06,327 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;@5a9ad47b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:41:06,327 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:41:06,333 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:41:06,333 INFO L124 PetriNetUnfolderBase]: 5/39 cut-off events. [2023-08-04 09:41:06,334 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:41:06,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:41:06,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:41:06,335 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:41:06,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:41:06,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1495798497, now seen corresponding path program 1 times [2023-08-04 09:41:06,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:41:06,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728261519] [2023-08-04 09:41:06,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:06,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:41:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:06,631 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 09:41:06,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:41:06,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728261519] [2023-08-04 09:41:06,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728261519] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:41:06,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:41:06,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:41:06,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106790759] [2023-08-04 09:41:06,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:41:06,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:41:06,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:41:06,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:41:06,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:41:06,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 417 [2023-08-04 09:41:06,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 55 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:06,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:41:06,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 417 [2023-08-04 09:41:06,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:41:07,231 INFO L124 PetriNetUnfolderBase]: 4661/6315 cut-off events. [2023-08-04 09:41:07,232 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2023-08-04 09:41:07,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12706 conditions, 6315 events. 4661/6315 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 30136 event pairs, 2338 based on Foata normal form. 0/3683 useless extension candidates. Maximal degree in co-relation 10643. Up to 6045 conditions per place. [2023-08-04 09:41:07,269 INFO L140 encePairwiseOnDemand]: 413/417 looper letters, 46 selfloop transitions, 2 changer transitions 4/58 dead transitions. [2023-08-04 09:41:07,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 58 transitions, 256 flow [2023-08-04 09:41:07,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:41:07,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:41:07,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-08-04 09:41:07,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4892086330935252 [2023-08-04 09:41:07,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-08-04 09:41:07,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-08-04 09:41:07,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:41:07,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-08-04 09:41:07,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:07,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 417.0) internal successors, (1668), 4 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:07,312 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 417.0) internal successors, (1668), 4 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:07,313 INFO L175 Difference]: Start difference. First operand has 47 places, 55 transitions, 152 flow. Second operand 3 states and 612 transitions. [2023-08-04 09:41:07,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 58 transitions, 256 flow [2023-08-04 09:41:07,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 58 transitions, 256 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:41:07,321 INFO L231 Difference]: Finished difference. Result has 49 places, 51 transitions, 146 flow [2023-08-04 09:41:07,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=417, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, 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=146, PETRI_PLACES=49, PETRI_TRANSITIONS=51} [2023-08-04 09:41:07,326 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2023-08-04 09:41:07,326 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 51 transitions, 146 flow [2023-08-04 09:41:07,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:07,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:41:07,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:41:07,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:41:07,328 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:41:07,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:41:07,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1165500007, now seen corresponding path program 1 times [2023-08-04 09:41:07,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:41:07,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823630383] [2023-08-04 09:41:07,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:07,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:41:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:07,457 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 09:41:07,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:41:07,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823630383] [2023-08-04 09:41:07,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823630383] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:41:07,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367240562] [2023-08-04 09:41:07,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:07,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:41:07,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:41:07,463 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 09:41:07,481 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 09:41:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:07,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:41:07,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:41:07,561 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 09:41:07,561 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:41:07,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367240562] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:41:07,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:41:07,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:41:07,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742251134] [2023-08-04 09:41:07,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:41:07,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:41:07,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:41:07,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:41:07,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:41:07,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 417 [2023-08-04 09:41:07,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:07,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:41:07,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 417 [2023-08-04 09:41:07,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:41:08,088 INFO L124 PetriNetUnfolderBase]: 4491/6028 cut-off events. [2023-08-04 09:41:08,088 INFO L125 PetriNetUnfolderBase]: For 265/265 co-relation queries the response was YES. [2023-08-04 09:41:08,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12137 conditions, 6028 events. 4491/6028 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 28165 event pairs, 1740 based on Foata normal form. 0/3504 useless extension candidates. Maximal degree in co-relation 10073. Up to 5776 conditions per place. [2023-08-04 09:41:08,124 INFO L140 encePairwiseOnDemand]: 414/417 looper letters, 49 selfloop transitions, 2 changer transitions 1/58 dead transitions. [2023-08-04 09:41:08,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 58 transitions, 264 flow [2023-08-04 09:41:08,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:41:08,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:41:08,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 614 transitions. [2023-08-04 09:41:08,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4908073541167066 [2023-08-04 09:41:08,129 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 614 transitions. [2023-08-04 09:41:08,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 614 transitions. [2023-08-04 09:41:08,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:41:08,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 614 transitions. [2023-08-04 09:41:08,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:08,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 417.0) internal successors, (1668), 4 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:08,134 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 417.0) internal successors, (1668), 4 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:08,134 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 146 flow. Second operand 3 states and 614 transitions. [2023-08-04 09:41:08,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 58 transitions, 264 flow [2023-08-04 09:41:08,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 248 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:41:08,138 INFO L231 Difference]: Finished difference. Result has 44 places, 51 transitions, 138 flow [2023-08-04 09:41:08,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=417, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=44, PETRI_TRANSITIONS=51} [2023-08-04 09:41:08,138 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2023-08-04 09:41:08,139 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 51 transitions, 138 flow [2023-08-04 09:41:08,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:08,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:41:08,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:41:08,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 09:41:08,346 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 09:41:08,347 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:41:08,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:41:08,348 INFO L85 PathProgramCache]: Analyzing trace with hash -723594925, now seen corresponding path program 1 times [2023-08-04 09:41:08,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:41:08,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146347023] [2023-08-04 09:41:08,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:08,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:41:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:08,464 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 09:41:08,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:41:08,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146347023] [2023-08-04 09:41:08,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146347023] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:41:08,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374522600] [2023-08-04 09:41:08,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:08,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:41:08,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:41:08,470 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 09:41:08,473 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 09:41:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:08,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:41:08,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:41:08,564 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 09:41:08,565 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:41:08,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374522600] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:41:08,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:41:08,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:41:08,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523105888] [2023-08-04 09:41:08,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:41:08,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:41:08,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:41:08,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:41:08,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:41:08,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 417 [2023-08-04 09:41:08,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 51 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:08,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:41:08,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 417 [2023-08-04 09:41:08,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:41:09,006 INFO L124 PetriNetUnfolderBase]: 4475/6012 cut-off events. [2023-08-04 09:41:09,006 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-04 09:41:09,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12125 conditions, 6012 events. 4475/6012 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 28318 event pairs, 1700 based on Foata normal form. 0/3532 useless extension candidates. Maximal degree in co-relation 5268. Up to 5497 conditions per place. [2023-08-04 09:41:09,042 INFO L140 encePairwiseOnDemand]: 414/417 looper letters, 53 selfloop transitions, 2 changer transitions 1/62 dead transitions. [2023-08-04 09:41:09,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 62 transitions, 272 flow [2023-08-04 09:41:09,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:41:09,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:41:09,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 618 transitions. [2023-08-04 09:41:09,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4940047961630695 [2023-08-04 09:41:09,047 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 618 transitions. [2023-08-04 09:41:09,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 618 transitions. [2023-08-04 09:41:09,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:41:09,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 618 transitions. [2023-08-04 09:41:09,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:09,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 417.0) internal successors, (1668), 4 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:09,051 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 417.0) internal successors, (1668), 4 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:09,052 INFO L175 Difference]: Start difference. First operand has 44 places, 51 transitions, 138 flow. Second operand 3 states and 618 transitions. [2023-08-04 09:41:09,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 62 transitions, 272 flow [2023-08-04 09:41:09,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 62 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:41:09,054 INFO L231 Difference]: Finished difference. Result has 45 places, 51 transitions, 142 flow [2023-08-04 09:41:09,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=417, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=45, PETRI_TRANSITIONS=51} [2023-08-04 09:41:09,056 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2023-08-04 09:41:09,056 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 51 transitions, 142 flow [2023-08-04 09:41:09,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:09,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:41:09,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:41:09,064 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 09:41:09,261 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 09:41:09,262 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:41:09,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:41:09,262 INFO L85 PathProgramCache]: Analyzing trace with hash 449663950, now seen corresponding path program 1 times [2023-08-04 09:41:09,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:41:09,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876310708] [2023-08-04 09:41:09,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:09,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:41:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:09,351 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 09:41:09,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:41:09,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876310708] [2023-08-04 09:41:09,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876310708] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:41:09,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655775343] [2023-08-04 09:41:09,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:09,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:41:09,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:41:09,358 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 09:41:09,361 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 09:41:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:09,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:41:09,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:41:09,458 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 09:41:09,459 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:41:09,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655775343] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:41:09,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:41:09,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:41:09,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823029100] [2023-08-04 09:41:09,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:41:09,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:41:09,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:41:09,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:41:09,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:41:09,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 417 [2023-08-04 09:41:09,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 51 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:09,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:41:09,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 417 [2023-08-04 09:41:09,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:41:09,794 INFO L124 PetriNetUnfolderBase]: 2747/3772 cut-off events. [2023-08-04 09:41:09,797 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-08-04 09:41:09,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7806 conditions, 3772 events. 2747/3772 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16381 event pairs, 1051 based on Foata normal form. 0/2320 useless extension candidates. Maximal degree in co-relation 3206. Up to 2809 conditions per place. [2023-08-04 09:41:09,816 INFO L140 encePairwiseOnDemand]: 414/417 looper letters, 58 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-08-04 09:41:09,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 66 transitions, 298 flow [2023-08-04 09:41:09,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:41:09,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:41:09,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2023-08-04 09:41:09,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49720223820943243 [2023-08-04 09:41:09,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2023-08-04 09:41:09,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2023-08-04 09:41:09,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:41:09,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2023-08-04 09:41:09,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:09,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 417.0) internal successors, (1668), 4 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:09,826 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 417.0) internal successors, (1668), 4 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:09,826 INFO L175 Difference]: Start difference. First operand has 45 places, 51 transitions, 142 flow. Second operand 3 states and 622 transitions. [2023-08-04 09:41:09,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 66 transitions, 298 flow [2023-08-04 09:41:09,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 66 transitions, 294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:41:09,830 INFO L231 Difference]: Finished difference. Result has 46 places, 52 transitions, 150 flow [2023-08-04 09:41:09,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=417, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=46, PETRI_TRANSITIONS=52} [2023-08-04 09:41:09,832 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -1 predicate places. [2023-08-04 09:41:09,832 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 52 transitions, 150 flow [2023-08-04 09:41:09,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:09,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:41:09,833 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] [2023-08-04 09:41:09,843 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 09:41:10,039 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 09:41:10,039 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:41:10,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:41:10,040 INFO L85 PathProgramCache]: Analyzing trace with hash 646774193, now seen corresponding path program 1 times [2023-08-04 09:41:10,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:41:10,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888196245] [2023-08-04 09:41:10,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:10,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:41:10,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:10,123 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 09:41:10,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:41:10,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888196245] [2023-08-04 09:41:10,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888196245] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:41:10,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077278367] [2023-08-04 09:41:10,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:10,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:41:10,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:41:10,129 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 09:41:10,131 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 09:41:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:10,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:41:10,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:41:10,229 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 09:41:10,230 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:41:10,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077278367] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:41:10,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:41:10,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:41:10,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479349318] [2023-08-04 09:41:10,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:41:10,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:41:10,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:41:10,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:41:10,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:41:10,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 417 [2023-08-04 09:41:10,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 52 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:10,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:41:10,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 417 [2023-08-04 09:41:10,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:41:10,505 INFO L124 PetriNetUnfolderBase]: 2322/3207 cut-off events. [2023-08-04 09:41:10,505 INFO L125 PetriNetUnfolderBase]: For 221/221 co-relation queries the response was YES. [2023-08-04 09:41:10,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6837 conditions, 3207 events. 2322/3207 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13524 event pairs, 1046 based on Foata normal form. 0/2080 useless extension candidates. Maximal degree in co-relation 2866. Up to 2639 conditions per place. [2023-08-04 09:41:10,524 INFO L140 encePairwiseOnDemand]: 414/417 looper letters, 59 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-04 09:41:10,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 308 flow [2023-08-04 09:41:10,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:41:10,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:41:10,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2023-08-04 09:41:10,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49720223820943243 [2023-08-04 09:41:10,527 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2023-08-04 09:41:10,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2023-08-04 09:41:10,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:41:10,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2023-08-04 09:41:10,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:10,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 417.0) internal successors, (1668), 4 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:10,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 417.0) internal successors, (1668), 4 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:10,532 INFO L175 Difference]: Start difference. First operand has 46 places, 52 transitions, 150 flow. Second operand 3 states and 622 transitions. [2023-08-04 09:41:10,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 308 flow [2023-08-04 09:41:10,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:41:10,540 INFO L231 Difference]: Finished difference. Result has 48 places, 53 transitions, 160 flow [2023-08-04 09:41:10,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=417, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=48, PETRI_TRANSITIONS=53} [2023-08-04 09:41:10,542 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 1 predicate places. [2023-08-04 09:41:10,542 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 53 transitions, 160 flow [2023-08-04 09:41:10,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:10,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:41:10,543 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] [2023-08-04 09:41:10,551 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 09:41:10,749 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 09:41:10,749 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:41:10,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:41:10,749 INFO L85 PathProgramCache]: Analyzing trace with hash -2079070122, now seen corresponding path program 1 times [2023-08-04 09:41:10,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:41:10,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282962396] [2023-08-04 09:41:10,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:10,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:41:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:10,813 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 09:41:10,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:41:10,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282962396] [2023-08-04 09:41:10,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282962396] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:41:10,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990854153] [2023-08-04 09:41:10,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:10,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:41:10,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:41:10,816 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 09:41:10,818 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 09:41:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:10,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:41:10,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:41:10,911 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 09:41:10,911 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:41:10,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990854153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:41:10,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:41:10,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:41:10,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734572702] [2023-08-04 09:41:10,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:41:10,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:41:10,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:41:10,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:41:10,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:41:10,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 417 [2023-08-04 09:41:10,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 53 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:10,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:41:10,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 417 [2023-08-04 09:41:10,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:41:11,154 INFO L124 PetriNetUnfolderBase]: 2304/3179 cut-off events. [2023-08-04 09:41:11,155 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2023-08-04 09:41:11,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6835 conditions, 3179 events. 2304/3179 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13359 event pairs, 1191 based on Foata normal form. 0/2085 useless extension candidates. Maximal degree in co-relation 5410. Up to 3020 conditions per place. [2023-08-04 09:41:11,169 INFO L140 encePairwiseOnDemand]: 414/417 looper letters, 53 selfloop transitions, 2 changer transitions 3/64 dead transitions. [2023-08-04 09:41:11,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 298 flow [2023-08-04 09:41:11,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:41:11,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:41:11,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 618 transitions. [2023-08-04 09:41:11,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4940047961630695 [2023-08-04 09:41:11,172 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 618 transitions. [2023-08-04 09:41:11,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 618 transitions. [2023-08-04 09:41:11,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:41:11,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 618 transitions. [2023-08-04 09:41:11,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:11,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 417.0) internal successors, (1668), 4 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:11,178 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 417.0) internal successors, (1668), 4 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:11,178 INFO L175 Difference]: Start difference. First operand has 48 places, 53 transitions, 160 flow. Second operand 3 states and 618 transitions. [2023-08-04 09:41:11,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 298 flow [2023-08-04 09:41:11,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 64 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:41:11,187 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 158 flow [2023-08-04 09:41:11,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=417, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2023-08-04 09:41:11,188 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 3 predicate places. [2023-08-04 09:41:11,188 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 158 flow [2023-08-04 09:41:11,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:11,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:41:11,189 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] [2023-08-04 09:41:11,196 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 09:41:11,394 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 09:41:11,394 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:41:11,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:41:11,395 INFO L85 PathProgramCache]: Analyzing trace with hash 154061455, now seen corresponding path program 1 times [2023-08-04 09:41:11,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:41:11,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405767468] [2023-08-04 09:41:11,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:11,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:41:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:11,452 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 09:41:11,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:41:11,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405767468] [2023-08-04 09:41:11,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405767468] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:41:11,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717868614] [2023-08-04 09:41:11,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:11,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:41:11,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:41:11,454 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 09:41:11,457 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 09:41:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:11,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:41:11,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:41:11,579 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 09:41:11,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:41:11,597 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 09:41:11,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717868614] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:41:11,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:41:11,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:41:11,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223301284] [2023-08-04 09:41:11,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:41:11,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:41:11,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:41:11,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:41:11,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:41:11,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 417 [2023-08-04 09:41:11,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:11,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:41:11,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 417 [2023-08-04 09:41:11,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:41:11,635 INFO L124 PetriNetUnfolderBase]: 12/28 cut-off events. [2023-08-04 09:41:11,635 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 09:41:11,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 28 events. 12/28 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 37 event pairs, 3 based on Foata normal form. 4/26 useless extension candidates. Maximal degree in co-relation 59. Up to 17 conditions per place. [2023-08-04 09:41:11,636 INFO L140 encePairwiseOnDemand]: 414/417 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2023-08-04 09:41:11,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 66 flow [2023-08-04 09:41:11,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:41:11,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:41:11,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 760 transitions. [2023-08-04 09:41:11,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4556354916067146 [2023-08-04 09:41:11,638 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 760 transitions. [2023-08-04 09:41:11,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 760 transitions. [2023-08-04 09:41:11,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:41:11,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 760 transitions. [2023-08-04 09:41:11,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:11,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 417.0) internal successors, (2085), 5 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:11,644 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 417.0) internal successors, (2085), 5 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:11,644 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 158 flow. Second operand 4 states and 760 transitions. [2023-08-04 09:41:11,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 66 flow [2023-08-04 09:41:11,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 64 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:41:11,645 INFO L231 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2023-08-04 09:41:11,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=417, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2023-08-04 09:41:11,645 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -25 predicate places. [2023-08-04 09:41:11,646 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2023-08-04 09:41:11,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:11,648 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:41:11,656 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 09:41:11,855 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 09:41:11,856 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:41:11,857 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:41:11,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 222 transitions, 486 flow [2023-08-04 09:41:11,912 INFO L124 PetriNetUnfolderBase]: 108/700 cut-off events. [2023-08-04 09:41:11,912 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:41:11,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 700 events. 108/700 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3391 event pairs, 0 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 403. Up to 16 conditions per place. [2023-08-04 09:41:11,915 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 222 transitions, 486 flow [2023-08-04 09:41:11,918 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 222 transitions, 486 flow [2023-08-04 09:41:11,918 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:41:11,918 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 222 transitions, 486 flow [2023-08-04 09:41:11,919 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 222 transitions, 486 flow [2023-08-04 09:41:11,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 222 transitions, 486 flow [2023-08-04 09:41:11,984 INFO L124 PetriNetUnfolderBase]: 108/700 cut-off events. [2023-08-04 09:41:11,985 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:41:11,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 700 events. 108/700 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3391 event pairs, 0 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 403. Up to 16 conditions per place. [2023-08-04 09:41:11,995 INFO L119 LiptonReduction]: Number of co-enabled transitions 6378 [2023-08-04 09:41:16,771 INFO L134 LiptonReduction]: Checked pairs total: 12621 [2023-08-04 09:41:16,771 INFO L136 LiptonReduction]: Total number of compositions: 200 [2023-08-04 09:41:16,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:41:16,774 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;@5a9ad47b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:41:16,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:41:16,779 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:41:16,779 INFO L124 PetriNetUnfolderBase]: 5/37 cut-off events. [2023-08-04 09:41:16,779 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:41:16,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:41:16,779 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:41:16,780 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 09:41:16,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:41:16,780 INFO L85 PathProgramCache]: Analyzing trace with hash 538581894, now seen corresponding path program 1 times [2023-08-04 09:41:16,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:41:16,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064810470] [2023-08-04 09:41:16,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:16,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:41:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:41:16,818 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:41:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:41:16,856 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:41:16,856 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:41:16,856 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:41:16,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:41:16,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:41:16,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:41:16,857 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:41:16,858 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:41:16,858 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:41:16,858 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:41:16,892 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:41:16,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 270 transitions, 630 flow [2023-08-04 09:41:17,356 INFO L124 PetriNetUnfolderBase]: 912/4237 cut-off events. [2023-08-04 09:41:17,356 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:41:17,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4911 conditions, 4237 events. 912/4237 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 33981 event pairs, 22 based on Foata normal form. 0/3569 useless extension candidates. Maximal degree in co-relation 2533. Up to 192 conditions per place. [2023-08-04 09:41:17,403 INFO L82 GeneralOperation]: Start removeDead. Operand has 236 places, 270 transitions, 630 flow [2023-08-04 09:41:17,424 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 236 places, 270 transitions, 630 flow [2023-08-04 09:41:17,424 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:41:17,424 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 236 places, 270 transitions, 630 flow [2023-08-04 09:41:17,425 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 236 places, 270 transitions, 630 flow [2023-08-04 09:41:17,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 270 transitions, 630 flow [2023-08-04 09:41:17,854 INFO L124 PetriNetUnfolderBase]: 912/4237 cut-off events. [2023-08-04 09:41:17,854 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:41:17,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4911 conditions, 4237 events. 912/4237 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 33981 event pairs, 22 based on Foata normal form. 0/3569 useless extension candidates. Maximal degree in co-relation 2533. Up to 192 conditions per place. [2023-08-04 09:41:17,984 INFO L119 LiptonReduction]: Number of co-enabled transitions 16856 [2023-08-04 09:41:22,818 INFO L134 LiptonReduction]: Checked pairs total: 41863 [2023-08-04 09:41:22,818 INFO L136 LiptonReduction]: Total number of compositions: 219 [2023-08-04 09:41:22,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:41:22,819 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;@5a9ad47b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:41:22,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:41:22,822 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:41:22,822 INFO L124 PetriNetUnfolderBase]: 5/36 cut-off events. [2023-08-04 09:41:22,822 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:41:22,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:41:22,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:41:22,822 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:41:22,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:41:22,823 INFO L85 PathProgramCache]: Analyzing trace with hash 211953487, now seen corresponding path program 1 times [2023-08-04 09:41:22,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:41:22,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161735418] [2023-08-04 09:41:22,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:22,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:41:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:22,854 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 09:41:22,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:41:22,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161735418] [2023-08-04 09:41:22,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161735418] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:41:22,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:41:22,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:41:22,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297787453] [2023-08-04 09:41:22,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:41:22,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:41:22,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:41:22,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:41:22,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:41:22,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 489 [2023-08-04 09:41:22,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 83 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:22,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:41:22,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 489 [2023-08-04 09:41:22,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:42:48,204 INFO L124 PetriNetUnfolderBase]: 1192534/1394738 cut-off events. [2023-08-04 09:42:48,204 INFO L125 PetriNetUnfolderBase]: For 122383/122383 co-relation queries the response was YES. [2023-08-04 09:42:52,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2821708 conditions, 1394738 events. 1192534/1394738 cut-off events. For 122383/122383 co-relation queries the response was YES. Maximal size of possible extension queue 25566. Compared 6889068 event pairs, 534271 based on Foata normal form. 0/798455 useless extension candidates. Maximal degree in co-relation 1015378. Up to 1362927 conditions per place. [2023-08-04 09:42:59,608 INFO L140 encePairwiseOnDemand]: 485/489 looper letters, 70 selfloop transitions, 2 changer transitions 3/87 dead transitions. [2023-08-04 09:42:59,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 408 flow [2023-08-04 09:42:59,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:42:59,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:42:59,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 728 transitions. [2023-08-04 09:42:59,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49625085207907293 [2023-08-04 09:42:59,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 728 transitions. [2023-08-04 09:42:59,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 728 transitions. [2023-08-04 09:42:59,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:42:59,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 728 transitions. [2023-08-04 09:42:59,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:59,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:59,651 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:59,651 INFO L175 Difference]: Start difference. First operand has 68 places, 83 transitions, 256 flow. Second operand 3 states and 728 transitions. [2023-08-04 09:42:59,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 408 flow [2023-08-04 09:42:59,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 87 transitions, 408 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:42:59,806 INFO L231 Difference]: Finished difference. Result has 70 places, 80 transitions, 248 flow [2023-08-04 09:42:59,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=70, PETRI_TRANSITIONS=80} [2023-08-04 09:42:59,809 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-04 09:42:59,809 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 80 transitions, 248 flow [2023-08-04 09:42:59,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:59,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:42:59,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:42:59,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:42:59,820 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:42:59,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:42:59,820 INFO L85 PathProgramCache]: Analyzing trace with hash -215897655, now seen corresponding path program 1 times [2023-08-04 09:42:59,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:42:59,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956489416] [2023-08-04 09:42:59,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:42:59,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:42:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:42:59,913 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 09:42:59,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:42:59,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956489416] [2023-08-04 09:42:59,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956489416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:42:59,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972949194] [2023-08-04 09:42:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:42:59,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:42:59,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:42:59,945 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 09:42:59,997 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 09:43:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:43:00,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:43:00,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:43:00,119 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 09:43:00,119 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:43:00,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972949194] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:43:00,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:43:00,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:43:00,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059204556] [2023-08-04 09:43:00,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:43:00,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:43:00,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:43:00,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:43:00,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:43:00,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 489 [2023-08-04 09:43:00,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 80 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:43:00,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:43:00,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 489 [2023-08-04 09:43:00,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:44:29,550 INFO L124 PetriNetUnfolderBase]: 1177174/1375572 cut-off events. [2023-08-04 09:44:29,551 INFO L125 PetriNetUnfolderBase]: For 115797/115797 co-relation queries the response was YES. [2023-08-04 09:44:34,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2783160 conditions, 1375572 events. 1177174/1375572 cut-off events. For 115797/115797 co-relation queries the response was YES. Maximal size of possible extension queue 25683. Compared 6733386 event pairs, 528586 based on Foata normal form. 0/787421 useless extension candidates. Maximal degree in co-relation 2783114. Up to 1345051 conditions per place. [2023-08-04 09:44:41,217 INFO L140 encePairwiseOnDemand]: 486/489 looper letters, 77 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-08-04 09:44:41,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 91 transitions, 428 flow [2023-08-04 09:44:41,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:44:41,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:44:41,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 733 transitions. [2023-08-04 09:44:41,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4996591683708248 [2023-08-04 09:44:41,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 733 transitions. [2023-08-04 09:44:41,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 733 transitions. [2023-08-04 09:44:41,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:44:41,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 733 transitions. [2023-08-04 09:44:41,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:44:41,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:44:41,228 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:44:41,228 INFO L175 Difference]: Start difference. First operand has 70 places, 80 transitions, 248 flow. Second operand 3 states and 733 transitions. [2023-08-04 09:44:41,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 91 transitions, 428 flow [2023-08-04 09:44:41,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 414 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:44:41,785 INFO L231 Difference]: Finished difference. Result has 66 places, 81 transitions, 246 flow [2023-08-04 09:44:41,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=66, PETRI_TRANSITIONS=81} [2023-08-04 09:44:41,786 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2023-08-04 09:44:41,786 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 81 transitions, 246 flow [2023-08-04 09:44:41,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:44:41,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:44:41,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:44:41,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 09:44:42,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:44:42,003 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:44:42,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:44:42,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1121603854, now seen corresponding path program 1 times [2023-08-04 09:44:42,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:44:42,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540374975] [2023-08-04 09:44:42,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:44:42,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:44:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:44:42,118 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 09:44:42,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:44:42,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540374975] [2023-08-04 09:44:42,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540374975] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:44:42,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971268573] [2023-08-04 09:44:42,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:44:42,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:44:42,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:44:42,149 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:44:42,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 09:44:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:44:42,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:44:42,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:44:42,292 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 09:44:42,292 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:44:42,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971268573] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:44:42,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:44:42,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:44:42,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535703371] [2023-08-04 09:44:42,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:44:42,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:44:42,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:44:42,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:44:42,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:44:42,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 489 [2023-08-04 09:44:42,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 81 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:44:42,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:44:42,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 489 [2023-08-04 09:44:42,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:46:07,198 INFO L124 PetriNetUnfolderBase]: 1174900/1381646 cut-off events. [2023-08-04 09:46:07,198 INFO L125 PetriNetUnfolderBase]: For 49745/49745 co-relation queries the response was YES. [2023-08-04 09:46:11,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2785830 conditions, 1381646 events. 1174900/1381646 cut-off events. For 49745/49745 co-relation queries the response was YES. Maximal size of possible extension queue 27255. Compared 7152439 event pairs, 524340 based on Foata normal form. 0/795247 useless extension candidates. Maximal degree in co-relation 814825. Up to 1331074 conditions per place. [2023-08-04 09:46:19,622 INFO L140 encePairwiseOnDemand]: 486/489 looper letters, 85 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-04 09:46:19,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 99 transitions, 456 flow [2023-08-04 09:46:19,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:46:19,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:46:19,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 740 transitions. [2023-08-04 09:46:19,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044308111792775 [2023-08-04 09:46:19,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 740 transitions. [2023-08-04 09:46:19,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 740 transitions. [2023-08-04 09:46:19,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:46:19,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 740 transitions. [2023-08-04 09:46:19,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:19,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:19,657 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:19,658 INFO L175 Difference]: Start difference. First operand has 66 places, 81 transitions, 246 flow. Second operand 3 states and 740 transitions. [2023-08-04 09:46:19,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 99 transitions, 456 flow [2023-08-04 09:46:19,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 99 transitions, 454 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:46:19,693 INFO L231 Difference]: Finished difference. Result has 68 places, 82 transitions, 256 flow [2023-08-04 09:46:19,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=68, PETRI_TRANSITIONS=82} [2023-08-04 09:46:19,694 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2023-08-04 09:46:19,695 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 82 transitions, 256 flow [2023-08-04 09:46:19,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:19,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:46:19,696 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] [2023-08-04 09:46:19,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 09:46:19,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 09:46:19,901 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:46:19,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:46:19,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1916601424, now seen corresponding path program 1 times [2023-08-04 09:46:19,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:46:19,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507348795] [2023-08-04 09:46:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:46:19,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:46:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:46:20,009 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 09:46:20,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:46:20,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507348795] [2023-08-04 09:46:20,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507348795] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:46:20,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043057387] [2023-08-04 09:46:20,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:46:20,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:46:20,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:46:20,021 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:46:20,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 09:46:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:46:20,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:46:20,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:46:20,177 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 09:46:20,178 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:46:20,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043057387] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:46:20,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:46:20,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:46:20,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947861817] [2023-08-04 09:46:20,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:46:20,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:46:20,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:46:20,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:46:20,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:46:20,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 489 [2023-08-04 09:46:20,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 82 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:20,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:46:20,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 489 [2023-08-04 09:46:20,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:47:30,287 INFO L124 PetriNetUnfolderBase]: 977076/1153854 cut-off events. [2023-08-04 09:47:30,288 INFO L125 PetriNetUnfolderBase]: For 44687/44687 co-relation queries the response was YES. [2023-08-04 09:47:33,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2347631 conditions, 1153854 events. 977076/1153854 cut-off events. For 44687/44687 co-relation queries the response was YES. Maximal size of possible extension queue 21445. Compared 5978988 event pairs, 397551 based on Foata normal form. 0/675359 useless extension candidates. Maximal degree in co-relation 743266. Up to 911106 conditions per place. [2023-08-04 09:47:37,643 INFO L140 encePairwiseOnDemand]: 486/489 looper letters, 96 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2023-08-04 09:47:37,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 110 transitions, 523 flow [2023-08-04 09:47:37,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:47:37,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:47:37,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 750 transitions. [2023-08-04 09:47:37,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5112474437627812 [2023-08-04 09:47:37,645 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 750 transitions. [2023-08-04 09:47:37,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 750 transitions. [2023-08-04 09:47:37,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:47:37,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 750 transitions. [2023-08-04 09:47:37,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:47:37,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:47:37,650 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:47:37,650 INFO L175 Difference]: Start difference. First operand has 68 places, 82 transitions, 256 flow. Second operand 3 states and 750 transitions. [2023-08-04 09:47:37,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 110 transitions, 523 flow [2023-08-04 09:47:37,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 110 transitions, 521 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:47:37,678 INFO L231 Difference]: Finished difference. Result has 70 places, 83 transitions, 266 flow [2023-08-04 09:47:37,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=70, PETRI_TRANSITIONS=83} [2023-08-04 09:47:37,679 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-04 09:47:37,679 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 83 transitions, 266 flow [2023-08-04 09:47:37,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:47:37,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:47:37,679 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] [2023-08-04 09:47:37,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 09:47:37,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:47:37,880 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:47:37,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:47:37,881 INFO L85 PathProgramCache]: Analyzing trace with hash 166213774, now seen corresponding path program 1 times [2023-08-04 09:47:37,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:47:37,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321473316] [2023-08-04 09:47:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:37,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:47:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:37,940 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 09:47:37,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:47:37,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321473316] [2023-08-04 09:47:37,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321473316] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:47:37,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350287379] [2023-08-04 09:47:37,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:37,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:47:37,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:47:37,942 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:47:37,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 09:47:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:38,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:47:38,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:47:38,049 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 09:47:38,049 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:47:38,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350287379] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:47:38,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:47:38,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:47:38,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439426674] [2023-08-04 09:47:38,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:47:38,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:47:38,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:47:38,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:47:38,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:47:38,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 489 [2023-08-04 09:47:38,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 83 transitions, 266 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 09:47:38,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:47:38,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 489 [2023-08-04 09:47:38,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:48:40,214 INFO L124 PetriNetUnfolderBase]: 878599/1043125 cut-off events. [2023-08-04 09:48:40,215 INFO L125 PetriNetUnfolderBase]: For 99655/99655 co-relation queries the response was YES. [2023-08-04 09:48:43,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2168997 conditions, 1043125 events. 878599/1043125 cut-off events. For 99655/99655 co-relation queries the response was YES. Maximal size of possible extension queue 17249. Compared 5417863 event pairs, 363264 based on Foata normal form. 0/630959 useless extension candidates. Maximal degree in co-relation 720610. Up to 809210 conditions per place. [2023-08-04 09:48:47,296 INFO L140 encePairwiseOnDemand]: 486/489 looper letters, 97 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-08-04 09:48:47,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 111 transitions, 535 flow [2023-08-04 09:48:47,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:48:47,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:48:47,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 750 transitions. [2023-08-04 09:48:47,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5112474437627812 [2023-08-04 09:48:47,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 750 transitions. [2023-08-04 09:48:47,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 750 transitions. [2023-08-04 09:48:47,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:48:47,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 750 transitions. [2023-08-04 09:48:47,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:48:47,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:48:47,303 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:48:47,303 INFO L175 Difference]: Start difference. First operand has 70 places, 83 transitions, 266 flow. Second operand 3 states and 750 transitions. [2023-08-04 09:48:47,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 111 transitions, 535 flow [2023-08-04 09:49:00,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 111 transitions, 533 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:49:00,468 INFO L231 Difference]: Finished difference. Result has 72 places, 84 transitions, 276 flow [2023-08-04 09:49:00,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=72, PETRI_TRANSITIONS=84} [2023-08-04 09:49:00,468 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2023-08-04 09:49:00,469 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 84 transitions, 276 flow [2023-08-04 09:49:00,469 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 09:49:00,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:00,469 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] [2023-08-04 09:49:00,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 09:49:00,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 09:49:00,670 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:00,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:00,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1018442336, now seen corresponding path program 1 times [2023-08-04 09:49:00,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:00,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456640868] [2023-08-04 09:49:00,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:00,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:00,718 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 09:49:00,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:00,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456640868] [2023-08-04 09:49:00,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456640868] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:00,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413870613] [2023-08-04 09:49:00,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:00,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:00,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:00,720 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:49:00,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 09:49:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:00,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:49:00,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:00,828 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 09:49:00,828 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:49:00,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413870613] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:49:00,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:49:00,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:49:00,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213593464] [2023-08-04 09:49:00,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:49:00,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:49:00,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:00,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:49:00,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:49:00,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 489 [2023-08-04 09:49:00,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 84 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:49:00,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:00,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 489 [2023-08-04 09:49:00,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:04,388 INFO L124 PetriNetUnfolderBase]: 869402/1033708 cut-off events. [2023-08-04 09:50:04,388 INFO L125 PetriNetUnfolderBase]: For 98177/98177 co-relation queries the response was YES. [2023-08-04 09:50:07,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2170310 conditions, 1033708 events. 869402/1033708 cut-off events. For 98177/98177 co-relation queries the response was YES. Maximal size of possible extension queue 16918. Compared 5378596 event pairs, 417783 based on Foata normal form. 0/634879 useless extension candidates. Maximal degree in co-relation 1320236. Up to 928296 conditions per place. [2023-08-04 09:50:11,555 INFO L140 encePairwiseOnDemand]: 486/489 looper letters, 98 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2023-08-04 09:50:11,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 112 transitions, 547 flow [2023-08-04 09:50:11,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:11,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:11,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 750 transitions. [2023-08-04 09:50:11,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5112474437627812 [2023-08-04 09:50:11,557 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 750 transitions. [2023-08-04 09:50:11,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 750 transitions. [2023-08-04 09:50:11,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:11,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 750 transitions. [2023-08-04 09:50:11,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:11,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:11,562 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:11,562 INFO L175 Difference]: Start difference. First operand has 72 places, 84 transitions, 276 flow. Second operand 3 states and 750 transitions. [2023-08-04 09:50:11,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 112 transitions, 547 flow Received shutdown request... [2023-08-04 09:50:23,609 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 09:50:23,609 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 09:50:24,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 09:50:24,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown