/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_test-easy10.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:50:39,064 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:50:39,125 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:50:39,131 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:50:39,131 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:50:39,132 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:50:39,132 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:50:39,153 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:50:39,154 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:50:39,157 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:50:39,157 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:50:39,157 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:50:39,158 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:50:39,158 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:50:39,159 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:50:39,159 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:50:39,159 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:50:39,159 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:50:39,159 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:50:39,159 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:50:39,159 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:50:39,160 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:50:39,160 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:50:39,160 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:50:39,160 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:50:39,160 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:50:39,160 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:50:39,161 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:50:39,161 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:50:39,161 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:50:39,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:50:39,162 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:50:39,162 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:50:39,162 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:50:39,162 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:50:39,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:50:39,162 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:50:39,163 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:50:39,163 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:50:39,163 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:50:39,163 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:50:39,163 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:50:39,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:50:39,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:50:39,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:50:39,370 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:50:39,371 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:50:39,371 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy10.wvr_bound2.c [2023-08-04 09:50:40,442 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:50:40,612 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:50:40,612 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy10.wvr_bound2.c [2023-08-04 09:50:40,618 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb176e9d/8c36887338b44a5889e3b176f1387d63/FLAG70a65dfe1 [2023-08-04 09:50:40,632 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb176e9d/8c36887338b44a5889e3b176f1387d63 [2023-08-04 09:50:40,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:50:40,637 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:50:40,639 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:50:40,639 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:50:40,641 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:50:40,642 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,642 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3be59e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40, skipping insertion in model container [2023-08-04 09:50:40,642 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,668 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:50:40,791 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_test-easy10.wvr_bound2.c[4231,4244] [2023-08-04 09:50:40,792 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:50:40,799 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:50:40,822 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_test-easy10.wvr_bound2.c[4231,4244] [2023-08-04 09:50:40,823 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:50:40,828 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:50:40,828 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:50:40,836 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:50:40,839 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40 WrapperNode [2023-08-04 09:50:40,839 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:50:40,840 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:50:40,840 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:50:40,840 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:50:40,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,857 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,874 INFO L138 Inliner]: procedures = 23, calls = 84, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 256 [2023-08-04 09:50:40,875 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:50:40,875 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:50:40,875 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:50:40,875 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:50:40,881 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,881 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,885 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,885 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,890 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,892 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,893 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,894 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,896 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:50:40,899 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:50:40,899 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:50:40,899 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:50:40,899 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:50:40,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:40,932 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 09:50:40,936 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 09:50:40,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:50:40,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:50:40,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:50:40,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:50:40,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:50:40,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:50:40,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:50:40,963 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 09:50:40,963 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 09:50:40,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:50:40,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:50:40,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:50:40,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:50:40,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:50:40,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:50:40,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:50:40,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:50:40,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:50:40,965 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 09:50:41,050 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:50:41,051 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:50:41,254 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:50:41,290 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:50:41,291 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-04 09:50:41,292 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:50:41 BoogieIcfgContainer [2023-08-04 09:50:41,292 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:50:41,294 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:50:41,294 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:50:41,296 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:50:41,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:50:40" (1/3) ... [2023-08-04 09:50:41,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f02154f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:50:41, skipping insertion in model container [2023-08-04 09:50:41,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (2/3) ... [2023-08-04 09:50:41,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f02154f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:50:41, skipping insertion in model container [2023-08-04 09:50:41,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:50:41" (3/3) ... [2023-08-04 09:50:41,297 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_test-easy10.wvr_bound2.c [2023-08-04 09:50:41,302 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:50:41,308 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:50:41,308 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:50:41,308 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:50:41,374 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 09:50:41,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 203 transitions, 474 flow [2023-08-04 09:50:41,603 INFO L124 PetriNetUnfolderBase]: 239/1471 cut-off events. [2023-08-04 09:50:41,603 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:50:41,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1649 conditions, 1471 events. 239/1471 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 10494 event pairs, 0 based on Foata normal form. 0/1250 useless extension candidates. Maximal degree in co-relation 828. Up to 33 conditions per place. [2023-08-04 09:50:41,611 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 203 transitions, 474 flow [2023-08-04 09:50:41,621 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 187 transitions, 434 flow [2023-08-04 09:50:41,623 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:50:41,636 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 187 transitions, 434 flow [2023-08-04 09:50:41,640 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 187 transitions, 434 flow [2023-08-04 09:50:41,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 187 transitions, 434 flow [2023-08-04 09:50:41,742 INFO L124 PetriNetUnfolderBase]: 239/1264 cut-off events. [2023-08-04 09:50:41,742 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:50:41,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1427 conditions, 1264 events. 239/1264 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 8360 event pairs, 0 based on Foata normal form. 0/1059 useless extension candidates. Maximal degree in co-relation 718. Up to 33 conditions per place. [2023-08-04 09:50:41,762 INFO L119 LiptonReduction]: Number of co-enabled transitions 6304 [2023-08-04 09:50:45,059 INFO L134 LiptonReduction]: Checked pairs total: 39103 [2023-08-04 09:50:45,059 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-08-04 09:50:45,071 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:50:45,083 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;@17834379, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:50:45,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:50:45,093 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:50:45,093 INFO L124 PetriNetUnfolderBase]: 0/63 cut-off events. [2023-08-04 09:50:45,093 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:50:45,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:45,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:45,095 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:45,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:45,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1236431654, now seen corresponding path program 1 times [2023-08-04 09:50:45,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:45,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809873245] [2023-08-04 09:50:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:45,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:45,346 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 09:50:45,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:45,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809873245] [2023-08-04 09:50:45,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809873245] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:45,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:50:45,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:50:45,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271825396] [2023-08-04 09:50:45,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:45,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:45,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:45,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:45,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:50:45,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 332 [2023-08-04 09:50:45,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 73 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:45,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:45,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 332 [2023-08-04 09:50:45,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:46,422 INFO L124 PetriNetUnfolderBase]: 8064/12729 cut-off events. [2023-08-04 09:50:46,422 INFO L125 PetriNetUnfolderBase]: For 1024/1024 co-relation queries the response was YES. [2023-08-04 09:50:46,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25659 conditions, 12729 events. 8064/12729 cut-off events. For 1024/1024 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 99731 event pairs, 7102 based on Foata normal form. 0/11066 useless extension candidates. Maximal degree in co-relation 20013. Up to 11768 conditions per place. [2023-08-04 09:50:46,487 INFO L140 encePairwiseOnDemand]: 329/332 looper letters, 53 selfloop transitions, 2 changer transitions 1/76 dead transitions. [2023-08-04 09:50:46,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 76 transitions, 324 flow [2023-08-04 09:50:46,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:46,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:46,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2023-08-04 09:50:46,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512048192771084 [2023-08-04 09:50:46,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2023-08-04 09:50:46,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2023-08-04 09:50:46,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:46,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2023-08-04 09:50:46,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:46,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:46,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:46,519 INFO L175 Difference]: Start difference. First operand has 66 places, 73 transitions, 206 flow. Second operand 3 states and 549 transitions. [2023-08-04 09:50:46,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 76 transitions, 324 flow [2023-08-04 09:50:46,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 76 transitions, 304 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:50:46,617 INFO L231 Difference]: Finished difference. Result has 65 places, 73 transitions, 194 flow [2023-08-04 09:50:46,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=65, PETRI_TRANSITIONS=73} [2023-08-04 09:50:46,620 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2023-08-04 09:50:46,620 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 73 transitions, 194 flow [2023-08-04 09:50:46,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:46,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:46,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:46,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:50:46,624 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:46,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:46,627 INFO L85 PathProgramCache]: Analyzing trace with hash -68917479, now seen corresponding path program 1 times [2023-08-04 09:50:46,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:46,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267937257] [2023-08-04 09:50:46,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:46,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:46,705 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 09:50:46,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:46,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267937257] [2023-08-04 09:50:46,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267937257] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:46,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731626130] [2023-08-04 09:50:46,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:46,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:46,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:46,709 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 09:50:46,710 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 09:50:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:46,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:50:46,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:46,791 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 09:50:46,791 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:50:46,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731626130] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:46,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:50:46,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:50:46,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378006551] [2023-08-04 09:50:46,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:46,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:46,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:46,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:46,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:46,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 332 [2023-08-04 09:50:46,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 73 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:46,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:46,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 332 [2023-08-04 09:50:46,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:47,626 INFO L124 PetriNetUnfolderBase]: 7780/12222 cut-off events. [2023-08-04 09:50:47,626 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 09:50:47,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24636 conditions, 12222 events. 7780/12222 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 94545 event pairs, 6868 based on Foata normal form. 0/10718 useless extension candidates. Maximal degree in co-relation 10752. Up to 11299 conditions per place. [2023-08-04 09:50:47,679 INFO L140 encePairwiseOnDemand]: 329/332 looper letters, 55 selfloop transitions, 2 changer transitions 1/78 dead transitions. [2023-08-04 09:50:47,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 78 transitions, 320 flow [2023-08-04 09:50:47,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:47,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:47,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 551 transitions. [2023-08-04 09:50:47,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5532128514056225 [2023-08-04 09:50:47,681 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 551 transitions. [2023-08-04 09:50:47,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 551 transitions. [2023-08-04 09:50:47,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:47,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 551 transitions. [2023-08-04 09:50:47,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:47,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:47,684 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:47,684 INFO L175 Difference]: Start difference. First operand has 65 places, 73 transitions, 194 flow. Second operand 3 states and 551 transitions. [2023-08-04 09:50:47,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 78 transitions, 320 flow [2023-08-04 09:50:47,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 78 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:50:47,687 INFO L231 Difference]: Finished difference. Result has 66 places, 73 transitions, 198 flow [2023-08-04 09:50:47,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=66, PETRI_TRANSITIONS=73} [2023-08-04 09:50:47,687 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2023-08-04 09:50:47,687 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 73 transitions, 198 flow [2023-08-04 09:50:47,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:47,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:47,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:47,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 09:50:47,892 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 09:50:47,892 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:47,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:47,893 INFO L85 PathProgramCache]: Analyzing trace with hash 359499016, now seen corresponding path program 1 times [2023-08-04 09:50:47,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:47,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226609623] [2023-08-04 09:50:47,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:47,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:47,952 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 09:50:47,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:47,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226609623] [2023-08-04 09:50:47,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226609623] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:47,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048200475] [2023-08-04 09:50:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:47,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:47,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:47,954 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 09:50:47,956 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 09:50:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:48,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:50:48,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:48,022 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 09:50:48,022 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:50:48,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048200475] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:48,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:50:48,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:50:48,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832821549] [2023-08-04 09:50:48,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:48,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:48,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:48,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:48,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:48,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 332 [2023-08-04 09:50:48,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 73 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:48,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:48,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 332 [2023-08-04 09:50:48,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:48,767 INFO L124 PetriNetUnfolderBase]: 7576/11883 cut-off events. [2023-08-04 09:50:48,767 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 09:50:48,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24012 conditions, 11883 events. 7576/11883 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 92344 event pairs, 4176 based on Foata normal form. 0/10530 useless extension candidates. Maximal degree in co-relation 10583. Up to 10916 conditions per place. [2023-08-04 09:50:48,816 INFO L140 encePairwiseOnDemand]: 329/332 looper letters, 57 selfloop transitions, 2 changer transitions 1/80 dead transitions. [2023-08-04 09:50:48,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 80 transitions, 332 flow [2023-08-04 09:50:48,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:48,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2023-08-04 09:50:48,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5552208835341366 [2023-08-04 09:50:48,818 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2023-08-04 09:50:48,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2023-08-04 09:50:48,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:48,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2023-08-04 09:50:48,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:48,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:48,821 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:48,821 INFO L175 Difference]: Start difference. First operand has 66 places, 73 transitions, 198 flow. Second operand 3 states and 553 transitions. [2023-08-04 09:50:48,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 80 transitions, 332 flow [2023-08-04 09:50:48,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 80 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:50:48,823 INFO L231 Difference]: Finished difference. Result has 67 places, 73 transitions, 202 flow [2023-08-04 09:50:48,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=67, PETRI_TRANSITIONS=73} [2023-08-04 09:50:48,823 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2023-08-04 09:50:48,824 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 73 transitions, 202 flow [2023-08-04 09:50:48,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:48,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:48,824 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 09:50:48,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 09:50:49,028 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 09:50:49,029 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:49,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:49,029 INFO L85 PathProgramCache]: Analyzing trace with hash -920587098, now seen corresponding path program 1 times [2023-08-04 09:50:49,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:49,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679482674] [2023-08-04 09:50:49,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:49,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:49,104 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 09:50:49,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:49,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679482674] [2023-08-04 09:50:49,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679482674] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:49,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275657265] [2023-08-04 09:50:49,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:49,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:49,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:49,121 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 09:50:49,156 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 09:50:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:49,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:50:49,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:49,227 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 09:50:49,227 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:50:49,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275657265] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:49,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:50:49,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:50:49,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908337017] [2023-08-04 09:50:49,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:49,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:49,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:49,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:49,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:49,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 332 [2023-08-04 09:50:49,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 73 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:49,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:49,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 332 [2023-08-04 09:50:49,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:50,144 INFO L124 PetriNetUnfolderBase]: 7549/11862 cut-off events. [2023-08-04 09:50:50,144 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-08-04 09:50:50,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24043 conditions, 11862 events. 7549/11862 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 92470 event pairs, 4222 based on Foata normal form. 0/10620 useless extension candidates. Maximal degree in co-relation 10594. Up to 10589 conditions per place. [2023-08-04 09:50:50,192 INFO L140 encePairwiseOnDemand]: 329/332 looper letters, 59 selfloop transitions, 2 changer transitions 1/82 dead transitions. [2023-08-04 09:50:50,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 82 transitions, 344 flow [2023-08-04 09:50:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 555 transitions. [2023-08-04 09:50:50,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5572289156626506 [2023-08-04 09:50:50,194 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 555 transitions. [2023-08-04 09:50:50,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 555 transitions. [2023-08-04 09:50:50,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:50,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 555 transitions. [2023-08-04 09:50:50,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:50,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:50,197 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:50,197 INFO L175 Difference]: Start difference. First operand has 67 places, 73 transitions, 202 flow. Second operand 3 states and 555 transitions. [2023-08-04 09:50:50,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 82 transitions, 344 flow [2023-08-04 09:50:50,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 82 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:50:50,199 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 206 flow [2023-08-04 09:50:50,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2023-08-04 09:50:50,199 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 2 predicate places. [2023-08-04 09:50:50,199 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 206 flow [2023-08-04 09:50:50,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:50,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:50,200 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 09:50:50,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 09:50:50,404 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 09:50:50,404 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:50,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:50,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1669215122, now seen corresponding path program 1 times [2023-08-04 09:50:50,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:50,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581455160] [2023-08-04 09:50:50,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:50,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:50,442 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 09:50:50,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:50,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581455160] [2023-08-04 09:50:50,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581455160] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:50,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48463777] [2023-08-04 09:50:50,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:50,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:50,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:50,444 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 09:50:50,446 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 09:50:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:50,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:50:50,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:50,515 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 09:50:50,515 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:50:50,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48463777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:50,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:50:50,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:50:50,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71959709] [2023-08-04 09:50:50,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:50,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:50,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:50,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:50,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:50,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 332 [2023-08-04 09:50:50,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:50,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:50,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 332 [2023-08-04 09:50:50,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:51,121 INFO L124 PetriNetUnfolderBase]: 5065/8181 cut-off events. [2023-08-04 09:50:51,121 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-08-04 09:50:51,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16898 conditions, 8181 events. 5065/8181 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 61360 event pairs, 3614 based on Foata normal form. 0/7290 useless extension candidates. Maximal degree in co-relation 8032. Up to 6701 conditions per place. [2023-08-04 09:50:51,153 INFO L140 encePairwiseOnDemand]: 329/332 looper letters, 65 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-04 09:50:51,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 376 flow [2023-08-04 09:50:51,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:51,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-08-04 09:50:51,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5622489959839357 [2023-08-04 09:50:51,155 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-08-04 09:50:51,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-08-04 09:50:51,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:51,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-08-04 09:50:51,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:51,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:51,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:51,158 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 206 flow. Second operand 3 states and 560 transitions. [2023-08-04 09:50:51,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 376 flow [2023-08-04 09:50:51,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 372 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:50:51,161 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 214 flow [2023-08-04 09:50:51,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2023-08-04 09:50:51,162 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2023-08-04 09:50:51,162 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 214 flow [2023-08-04 09:50:51,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:51,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:51,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:51,170 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 09:50:51,367 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 09:50:51,367 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:51,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:51,368 INFO L85 PathProgramCache]: Analyzing trace with hash 74180226, now seen corresponding path program 1 times [2023-08-04 09:50:51,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:51,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738040969] [2023-08-04 09:50:51,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:51,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:51,449 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 09:50:51,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:51,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738040969] [2023-08-04 09:50:51,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738040969] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:51,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807074190] [2023-08-04 09:50:51,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:51,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:51,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:51,450 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 09:50:51,452 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 09:50:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:51,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:50:51,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:51,555 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 09:50:51,555 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:50:51,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807074190] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:51,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:50:51,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:50:51,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306070878] [2023-08-04 09:50:51,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:51,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:51,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:51,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:51,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:51,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 332 [2023-08-04 09:50:51,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:51,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:51,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 332 [2023-08-04 09:50:51,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:52,077 INFO L124 PetriNetUnfolderBase]: 3766/6259 cut-off events. [2023-08-04 09:50:52,078 INFO L125 PetriNetUnfolderBase]: For 256/256 co-relation queries the response was YES. [2023-08-04 09:50:52,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13432 conditions, 6259 events. 3766/6259 cut-off events. For 256/256 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 45546 event pairs, 2893 based on Foata normal form. 0/5867 useless extension candidates. Maximal degree in co-relation 6447. Up to 4649 conditions per place. [2023-08-04 09:50:52,103 INFO L140 encePairwiseOnDemand]: 329/332 looper letters, 66 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-04 09:50:52,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 386 flow [2023-08-04 09:50:52,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:52,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:52,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-08-04 09:50:52,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5622489959839357 [2023-08-04 09:50:52,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-08-04 09:50:52,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-08-04 09:50:52,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:52,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-08-04 09:50:52,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:52,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:52,109 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:52,109 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 214 flow. Second operand 3 states and 560 transitions. [2023-08-04 09:50:52,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 386 flow [2023-08-04 09:50:52,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 88 transitions, 384 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:50:52,115 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 224 flow [2023-08-04 09:50:52,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2023-08-04 09:50:52,115 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 5 predicate places. [2023-08-04 09:50:52,116 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 224 flow [2023-08-04 09:50:52,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:52,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:52,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:52,127 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 09:50:52,321 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 09:50:52,322 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:52,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:52,322 INFO L85 PathProgramCache]: Analyzing trace with hash 923133023, now seen corresponding path program 1 times [2023-08-04 09:50:52,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:52,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674715916] [2023-08-04 09:50:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:52,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:52,383 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 09:50:52,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:52,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674715916] [2023-08-04 09:50:52,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674715916] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:52,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336390768] [2023-08-04 09:50:52,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:52,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:52,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:52,387 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 09:50:52,414 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 09:50:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:52,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:50:52,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:50:52,477 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:50:52,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336390768] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:52,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:50:52,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:50:52,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161684688] [2023-08-04 09:50:52,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:52,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:52,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:52,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:52,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:52,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 332 [2023-08-04 09:50:52,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:52,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:52,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 332 [2023-08-04 09:50:52,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:52,825 INFO L124 PetriNetUnfolderBase]: 3513/5848 cut-off events. [2023-08-04 09:50:52,826 INFO L125 PetriNetUnfolderBase]: For 430/430 co-relation queries the response was YES. [2023-08-04 09:50:52,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12871 conditions, 5848 events. 3513/5848 cut-off events. For 430/430 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 41855 event pairs, 3202 based on Foata normal form. 0/5631 useless extension candidates. Maximal degree in co-relation 7999. Up to 5077 conditions per place. [2023-08-04 09:50:52,848 INFO L140 encePairwiseOnDemand]: 329/332 looper letters, 67 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-04 09:50:52,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 89 transitions, 398 flow [2023-08-04 09:50:52,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:52,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:52,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-08-04 09:50:52,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5622489959839357 [2023-08-04 09:50:52,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-08-04 09:50:52,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-08-04 09:50:52,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:52,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-08-04 09:50:52,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:52,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:52,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:52,853 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 224 flow. Second operand 3 states and 560 transitions. [2023-08-04 09:50:52,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 89 transitions, 398 flow [2023-08-04 09:50:52,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 89 transitions, 396 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:50:52,869 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 234 flow [2023-08-04 09:50:52,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2023-08-04 09:50:52,870 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 7 predicate places. [2023-08-04 09:50:52,870 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 234 flow [2023-08-04 09:50:52,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:52,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:52,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:52,875 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 09:50:53,074 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 09:50:53,075 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:53,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:53,075 INFO L85 PathProgramCache]: Analyzing trace with hash -912873711, now seen corresponding path program 1 times [2023-08-04 09:50:53,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:53,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696789444] [2023-08-04 09:50:53,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:53,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:50:53,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:53,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696789444] [2023-08-04 09:50:53,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696789444] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:53,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328174156] [2023-08-04 09:50:53,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:53,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:53,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:53,123 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 09:50:53,125 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 09:50:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:53,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:50:53,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:50:53,206 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:50:53,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328174156] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:53,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:50:53,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 09:50:53,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475900514] [2023-08-04 09:50:53,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:53,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:53,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:53,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:53,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:53,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 332 [2023-08-04 09:50:53,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:53,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:53,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 332 [2023-08-04 09:50:53,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:53,655 INFO L124 PetriNetUnfolderBase]: 3504/5829 cut-off events. [2023-08-04 09:50:53,655 INFO L125 PetriNetUnfolderBase]: For 336/336 co-relation queries the response was YES. [2023-08-04 09:50:53,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12874 conditions, 5829 events. 3504/5829 cut-off events. For 336/336 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 41759 event pairs, 3347 based on Foata normal form. 0/5637 useless extension candidates. Maximal degree in co-relation 11747. Up to 5354 conditions per place. [2023-08-04 09:50:53,680 INFO L140 encePairwiseOnDemand]: 329/332 looper letters, 59 selfloop transitions, 2 changer transitions 4/85 dead transitions. [2023-08-04 09:50:53,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 85 transitions, 382 flow [2023-08-04 09:50:53,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:53,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:53,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 555 transitions. [2023-08-04 09:50:53,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5572289156626506 [2023-08-04 09:50:53,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 555 transitions. [2023-08-04 09:50:53,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 555 transitions. [2023-08-04 09:50:53,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:53,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 555 transitions. [2023-08-04 09:50:53,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:53,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:53,687 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:53,688 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 234 flow. Second operand 3 states and 555 transitions. [2023-08-04 09:50:53,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 85 transitions, 382 flow [2023-08-04 09:50:53,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 85 transitions, 380 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:50:53,706 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 228 flow [2023-08-04 09:50:53,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2023-08-04 09:50:53,707 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 9 predicate places. [2023-08-04 09:50:53,707 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 228 flow [2023-08-04 09:50:53,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:53,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:53,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:50:53,713 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 09:50:53,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:53,913 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:53,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:53,914 INFO L85 PathProgramCache]: Analyzing trace with hash 368750718, now seen corresponding path program 1 times [2023-08-04 09:50:53,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:53,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954089329] [2023-08-04 09:50:53,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:53,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:50:53,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:53,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954089329] [2023-08-04 09:50:53,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954089329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:53,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460935827] [2023-08-04 09:50:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:53,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:53,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:54,013 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 09:50:54,033 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 09:50:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:54,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:50:54,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:50:54,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:50:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:50:54,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460935827] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:50:54,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:50:54,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:50:54,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934420822] [2023-08-04 09:50:54,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:50:54,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:50:54,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:54,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:50:54,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:54,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 332 [2023-08-04 09:50:54,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 172.4) internal successors, (862), 5 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:54,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:54,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 332 [2023-08-04 09:50:54,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:54,240 INFO L124 PetriNetUnfolderBase]: 4/19 cut-off events. [2023-08-04 09:50:54,240 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:50:54,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 19 events. 4/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 3/21 useless extension candidates. Maximal degree in co-relation 38. Up to 10 conditions per place. [2023-08-04 09:50:54,241 INFO L140 encePairwiseOnDemand]: 329/332 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2023-08-04 09:50:54,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 13 transitions, 48 flow [2023-08-04 09:50:54,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:50:54,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:50:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 662 transitions. [2023-08-04 09:50:54,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49849397590361444 [2023-08-04 09:50:54,243 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 662 transitions. [2023-08-04 09:50:54,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 662 transitions. [2023-08-04 09:50:54,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:54,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 662 transitions. [2023-08-04 09:50:54,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 165.5) internal successors, (662), 4 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:54,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 332.0) internal successors, (1660), 5 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:54,248 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 332.0) internal successors, (1660), 5 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:54,248 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 228 flow. Second operand 4 states and 662 transitions. [2023-08-04 09:50:54,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 13 transitions, 48 flow [2023-08-04 09:50:54,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 13 transitions, 46 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:50:54,249 INFO L231 Difference]: Finished difference. Result has 26 places, 0 transitions, 0 flow [2023-08-04 09:50:54,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=26, PETRI_TRANSITIONS=0} [2023-08-04 09:50:54,250 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -40 predicate places. [2023-08-04 09:50:54,250 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 0 transitions, 0 flow [2023-08-04 09:50:54,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 172.4) internal successors, (862), 5 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:50:54,253 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:50:54,273 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 09:50:54,476 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,SelfDestructingSolverStorable8 [2023-08-04 09:50:54,476 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:54,478 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:50:54,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 203 transitions, 474 flow [2023-08-04 09:50:54,607 INFO L124 PetriNetUnfolderBase]: 239/1471 cut-off events. [2023-08-04 09:50:54,607 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:50:54,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1649 conditions, 1471 events. 239/1471 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 10494 event pairs, 0 based on Foata normal form. 0/1250 useless extension candidates. Maximal degree in co-relation 828. Up to 33 conditions per place. [2023-08-04 09:50:54,611 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 203 transitions, 474 flow [2023-08-04 09:50:54,613 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 129 transitions, 278 flow [2023-08-04 09:50:54,613 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:50:54,613 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 129 transitions, 278 flow [2023-08-04 09:50:54,614 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 129 transitions, 278 flow [2023-08-04 09:50:54,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 129 transitions, 278 flow [2023-08-04 09:50:54,645 INFO L124 PetriNetUnfolderBase]: 15/431 cut-off events. [2023-08-04 09:50:54,646 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:50:54,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 431 events. 15/431 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2013 event pairs, 0 based on Foata normal form. 0/402 useless extension candidates. Maximal degree in co-relation 300. Up to 16 conditions per place. [2023-08-04 09:50:54,651 INFO L119 LiptonReduction]: Number of co-enabled transitions 2752 [2023-08-04 09:50:57,264 INFO L134 LiptonReduction]: Checked pairs total: 12411 [2023-08-04 09:50:57,264 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-08-04 09:50:57,265 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:50:57,265 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;@17834379, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:50:57,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 09:50:57,267 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:50:57,267 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 09:50:57,267 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:50:57,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:57,267 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 09:50:57,268 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 09:50:57,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:57,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1317967880, now seen corresponding path program 1 times [2023-08-04 09:50:57,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:57,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371439919] [2023-08-04 09:50:57,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:57,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:50:57,280 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:50:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:50:57,302 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:50:57,302 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:50:57,302 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 09:50:57,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 09:50:57,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 09:50:57,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 09:50:57,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 09:50:57,303 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:50:57,303 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:50:57,304 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:50:57,304 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:50:57,328 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 09:50:57,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 255 transitions, 654 flow [2023-08-04 09:50:59,157 INFO L124 PetriNetUnfolderBase]: 5322/20204 cut-off events. [2023-08-04 09:50:59,157 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:50:59,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24589 conditions, 20204 events. 5322/20204 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 219578 event pairs, 81 based on Foata normal form. 0/17403 useless extension candidates. Maximal degree in co-relation 12203. Up to 1024 conditions per place. [2023-08-04 09:50:59,307 INFO L82 GeneralOperation]: Start removeDead. Operand has 230 places, 255 transitions, 654 flow [2023-08-04 09:50:59,373 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 214 places, 239 transitions, 606 flow [2023-08-04 09:50:59,373 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:50:59,373 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 214 places, 239 transitions, 606 flow [2023-08-04 09:50:59,374 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 214 places, 239 transitions, 606 flow [2023-08-04 09:50:59,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 239 transitions, 606 flow [2023-08-04 09:51:01,037 INFO L124 PetriNetUnfolderBase]: 5322/17092 cut-off events. [2023-08-04 09:51:01,037 INFO L125 PetriNetUnfolderBase]: For 4136/4136 co-relation queries the response was YES. [2023-08-04 09:51:01,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21397 conditions, 17092 events. 5322/17092 cut-off events. For 4136/4136 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 170480 event pairs, 81 based on Foata normal form. 0/14547 useless extension candidates. Maximal degree in co-relation 10628. Up to 1024 conditions per place. [2023-08-04 09:51:01,428 INFO L119 LiptonReduction]: Number of co-enabled transitions 16960 [2023-08-04 09:51:04,749 INFO L134 LiptonReduction]: Checked pairs total: 123467 [2023-08-04 09:51:04,749 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-08-04 09:51:04,751 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:51:04,751 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;@17834379, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:51:04,751 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:51:04,756 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:51:04,756 INFO L124 PetriNetUnfolderBase]: 0/59 cut-off events. [2023-08-04 09:51:04,756 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:51:04,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:51:04,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:51:04,756 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:51:04,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:51:04,756 INFO L85 PathProgramCache]: Analyzing trace with hash -133592449, now seen corresponding path program 1 times [2023-08-04 09:51:04,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:51:04,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422158250] [2023-08-04 09:51:04,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:51:04,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:51:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:51:04,780 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 09:51:04,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:51:04,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422158250] [2023-08-04 09:51:04,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422158250] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:51:04,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:51:04,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:51:04,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609775033] [2023-08-04 09:51:04,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:51:04,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:51:04,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:51:04,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:51:04,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:51:04,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 387 [2023-08-04 09:51:04,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 121 transitions, 370 flow. Second operand has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:51:04,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:51:04,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 387 [2023-08-04 09:51:04,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand